LIBRARY 

OF  THE 

UNIVERSITY  OF  CALIFORNIA. 

GIF'T  OF* 


Acc&sion  No.   7  3  %%'2  .    Class  No. 


Collection?! 

1032 


SMITHSONIAN 


METEOROLOGICAL  TABLES 


[BASED  ON  GUYOT'S  METEOROLOGICAL  AND  PHYSICAL  TABLES] 


(SECOND  REVISED  EDITION} 
CORRECTED  TO  OCTOBER,  1897 


CITY   OF  WASHINGTON 

PUBLISHED   BY   THE   SMITHSONIAN   INSTITUTION 

*  1897 


ADVERTISEMENT  TO   SECOND   REVISED   EDITION. 


THE  edition  of  the  Smithsonian  Meteorological  Tables  issued  in  1893  having 
become  exhausted,  a  careful  examination  of  the  work  was  made,  at  my  request, 
by  Mr.  Alexander  McAdie,  of  the  United  States  Weather  Bureau,  and  a  revised 
edition  was  published  in  1896  with  corrections  upon  the  plates,  and  a  few  slight 
changes.  The  International  Meteorological  Symbols  and  an  Index  were  also 
added. 

The  demand  for  the  work  has  been  so  great  that  it  becomes  necessary  to  print 
a  new  edition  of  the  revised  work,  which  is  here  presented  with  corrections  to 

date. 

S.  P.  LANGLEY, 

Secretary. 

SMITHSONIAN  INSTITUTION, 
WASHINGTON  CITY,  October 30, 189? . 


OP; 


PREFACED 


In  connection  with  the  system  of  meteorological  observations  estab- 
lished by  the  Smithsonian  Institution  about  1850,  a  collection  of 
meteorological  tables  was  compiled  by  Dr.  ARNOLD  GUYOT,  at  the 
request  of  Secretary  HENRY,  and  published  in  1852  as  a  volume  of  the 
Miscellaneous  Collections. 

Five  years  later,  in  1857,  a  second  edition  was  published  after 
careful  revision  by  the  author,  and  the  various  series  of  tables  were 
so  enlarged  as  to  extend  the  work  from  212  to  over  600  pages. 

In    1859   a  third  edition  was  published,  with  further  amendments. 

Although  designed  primarily  for  the  meteorological  observers  report- 
ing to  the  Smithsonian  Institution,  the  tables  obtained  a  much  wider 
circulation,  and  were  extensively  used  by  meteorologists  and  physicists 
in  Europe  and  in  the  United  States. 

After  twenty-five  years  of  valuable  service,  the  work  was  again 
revised  by  the  author;  and  the  fourth  edition,  containing  over  700 
pages,  was  published  in  1884.  Before  finishing  the  last  few  tables, 
Dr.  GUYOT  died,  and  the  completion  of  the  work  was  intrusted  to  his 
assistant,  Prof.  WM.  I/IBBEY,  JR.,  who  executed  the  duties  of  final  editor. 

In  a  few  years  the  demand  for  the  tables  exhausted  the  edition, 
and  thereupon  it  appeared  desirable  to  recast  entirely  the  work.  After 
very  careful  consideration,  I  decided  to  publish  the  new  tables  in 
three  parts:  METEOROLOGICAL  TABLES,  GEOGRAPHICAL  TABLES,  and 
PHYSICAL  TABLES,  each  representative  of  the  latest  knowledge  in  its 
field,  and  independent  of  the  others ;  but  the  three  forming  a  homo- 
geneous series. 

Although  thus  historically  related  to  Dr.  Guy  of  s  Tables,  the  present 
work  is  so  substantially  changed  with  respect  to  material,  arrange- 
ment, and  presentation  that  it  is  not  a  fifth  edition  of  the  older  tables, 
but  essentially  a  new  publication. 


Vi  PREFACE. 

In  its  preparation  the  advantage  of  conformity  with  the  recently 
issued  International  Meteorological  Tables  has  been  kept  steadily  in  view, 
and  so  far  as  consistent  with  other  decisions,  the  constants  and  methods 
there  employed  have  been  followed.  The  most  important  difference  in 
constants  is  the  relation  of  the  yard  to  the  metre.  The  value  provi- 
sionally adopted  by  the  Bureau  of  Weights  and  Measures  of  the  United 
States  Coast  and  Geodetic  Survey, 

i   metre  =  39.3700  inches, 

has  been  used  here  in  the  conversion-tables  of  metric  and  English 
linear  measures,  and  in  the  transformation  of  all  formulae  involving 
sush  conversions. 

A  large  number  of  tables  have  been  newly  computed;  those  taken 
from  the  International  Meteorological  Tables  and  other  official  sources 
are  credited  in  the  introduction. 

To  Prof.  WM.  LIBBEY,  JR.,  especial  acknowledgments  are  due  for 
a  large  amount  of  attention  given  to  the  present  work.  Prof.  I/TBBEY 
had  already  completed  a  revision,  involving  considerable  recomputation, 
of  the  meteorological  tables  contained  in  the  last  edition  of  Guyot's 
Tables,  when  it  was  determined  to  adopt  new  values  for  many  of  the 
constants,  and  to  have  the  present  volume  set  with  new  type.  This 
involved  a  large  amount  of  new  computation,  which  was  placed  under 
*he  direction  of  Mr.  GEORGE  E.  CURTIS,  who  has  also  written  the 
text,  aiid  has  carefully  prepared  the  whole  manuscript  and  carried  it 
^hrough  the  press.  To  Mr.  Curtis' s  interest,  and  to  his  special  experi- 
ence as  a  meteorologist,  the  present  volume  is  therefore  largely  due. 

Prof.  LJBBEY  has  contributed  Tables  38,  39,  55,  56,  61,  74,  77,  89, 
and  90,  and  has  also  read  the  proof-sheets  of  the  entire  work. 

I  desire  to  express  my  acknowledgments  to  Prof.  CI,EVEI,AND  ABBE, 
for  the  manuscript  of  Tables  32,  81,  82,  83,  84,  85,  86;  to  Mr.  H.  A. 
HAZEN,  for  Tables  49,  50,  94,  95,  96,  which  have  been  taken  from  his 
Hand-book  of  Meteorological  Tables;  and  also  to  the  Superintendent  of 
the  United  States  Coast  and  Geodetic  Survey,  the  Chief  Signal  Officer 
of  the  Army,  and  the  Chief  of  the  Weather  Bureau,  for  much  valuable 
counsel  during  the  progress  of  the  work. 

S.  P.  LANGLEY, 
/  f  tf  5  Secretary. 


TABLE  OF  CONTENTS. 


INTRODUCTION. 

PAGB 

Description  and  use  of  the  Tables xi  to  lix 

THERMOMETRICAL   TABLES. 

PAGB 

Conversion  of  thermometric  scales — 

1  Reaumur  scale  to  Fahrenheit  and  Centigrade     ......  2 

2  Fahrenheit  scale  to  Centigrade 3 

3  Centigrade  scale  to  Fahrenheit 7 

4  Centigrade  scale  to  Fahrenheit,  near  the  boiling  point  of 

water 9 

5  Differences  Fahrenheit  to  differences  Centigrade     ....  9 

6  Differences  Centigrade  to  differences  Fahrenheit      ....  9 

7  Reduction  of  temperature  to  sea  level — English  measures       .     .  10 

8  Reduction  of  temperature  to  sea  level — Metric  measures    ...  n 

9  Correction  for  the  temperature  of  the  mercury  in  the  thermometer 

stem.     For  Fahrenheit  and  Centigrade  thermometers    .  12 

BAROMETRICAL   TABLES. 

Reduction  of  the  barometer  to  standard  temperature  — 

10  English  measures 14 

1 1  Metric  measures 34 

Reduction  of  the  barometer  to  standard  gravity  at  latitude  45° — 

1 2  English  measures 58 

13  Metric  measures 59 

Reduction  of  the  barometer  to  sea  level  —  English  measures. 

1 4  Values  of  2000  m 60 

1 5  Correction  of  2000  m  for  latitude 69 

16  B.-B=B(iom  —  -L) 70 

Reduction  of  the  barometer  to  sea  level  —  Metric  measures. 

1 7  Values  of  2000  m 78 

1 8  Correction  of  2000  m  for  latitude 90 

19  B0  —  B  =  B(iom  —  i) 91 


Viii  TABLE    OF    CONTENTS. 

BAROMETRICAL   TABLES.— Continued. 
TABLE  PAGE 

Determination  of  heights  by  the  barometer  —  English  measures. 

20  Values  of  60368  [i  +  0.0010195  x  36]  log  29'9°  .  100 

£> 

21  Term  for  temperature        104 

22  Correction  for  latitude  and  weight  of  mercury 106 

23  Correction  .for  an  average  degree  of  humidity 108 

24  Correction  for  the  variation  of  gravity  with  altitude    .     .     .  109 
Determination  of  heights  by  the  barometer  —  Metric  measures. 

25  Values  of  18400  log  '—=- no 

JD 

26  Term  for  temperature    .     .     i in 

27  Correction  for  humidity      ..." 112 

28  Correction  for  latitude  and  weight  of  mercury 114 

29  Correction  for  the  variation  of  gravity  with  altitude    .     .     .  115 

30  Difference  of  height  corresponding  to  a  change  of  o.  i  inch  in  the 

barometer  —  English  measures 116 

3 1  Difference  of  height  corresponding  to  a  change  of  i  millimetre  in 

the  barometer — Metric  measures 117 

Determination  of  heights  by  the  barometer. 

32  Formula  of  Babinet 118 

Barometric  pressures  corresponding  to  the  temperature  of  the 

boiling  point  of  water  — 

33  English  measures 119 

34  Metric  measures 119 


HYGROMETRICAL    TABLES. 

Pressure  of  aqueous  vapor  (Brock)  — 

35  English  measures 122 

36  1  f  128 
43            Metric  measures 


} 


37  Pressure  of  aqueous  vapor  at  low  temperatures  (C.  F.  Marvin} — 

English  and  Metric  measures 13° 

38  Weight  of  aqueous  vapor  in  a  cubic  foot  of  saturated  air — 

English  measures *32 

39  Weight  of  aqueous  vapor  in  a  cubic  metre  of  saturated  air — 

Metric  measures X33 

Reduction  of  psychrometric  observations — English  measures. 

40  Pressure  of  aqueous  vapor J34 

41  Values  of  0.000367  B (*—*,)  (i  -f-  — -) *36 

42  Relative  humidity — Temperature  Fahrenheit I38 


OF    CONTENTS.  IX 

HYGROMETRICAL   TABLES.— Continued. 

TABLE  PAGB 

Reduction  of  psychrometric  observations  —  Metric  measures. 

43  Pressure  of  aqueous  vapor 142 

44  Values  of  0.000660  B(t—t^  ( i  +  —-*) J43 

\         873  / 

45  Relative  humidity — Temperature  Centigrade 144 

Reduction  of  snowfall  measurements. 

46  Depth  of  water  corresponding  to  the  weight  of  snow  (or  rain) 

collected  in  an  8 -inch  gage 146 

47  Rate  of  decrease  of  vapor  pressure  with  altitude 146 

WIND    TABLES. 

Mean  direction  of  the  wind  by  I/ambert's  formula — 

48  Multiples  of  cos  45° ;  form  and  example  of  computation  .     .  148 

49  Values  of  the  mean  direction  (a)  or  its  complement  (90  — a)  149 

50  Synoptic  conversion  of  velocities 154 

51  Miles  per  hour  into  feet  per  second 155 

52  Feet  per  second  into  miles  per  hour 155 

53  Metres  per  second  into  miles  per  hour 156 

54  Miles  per  hour  into  metres  per  second 157 

55  Metres  per  second  into  kilometres  per  hour 158 

56  Kilometres  per  hour  into  metres  per  second ,     .  159 

57  Beaufort  wind  scale  and  its  conversion  into  velocity 160 

GEODETICAL    TABLES. 

58  Relative  acceleration  of  gravity  at  different  latitudes     ....  162 

59  length  of  one  degree  of  the  meridian  at  different  latitudes     .     .  164 

60  Length  of  one  degree  of  the  parallel  at  different  latitudes  .     .     .  165 

61  Duration  of  sunshine  at  different  latitudes 166 

62  Declination  of  the  sun  for  the  year  1894 177 

63  Relative  intensity  of  solar  radiation  at  different  latitudes    .     .     .  178 

CONVERSION   OF   LINEAR    MEASURES. 

64  Inches  into  millimetres 180 

65  Millimetres  into  inches 187 

66  Feet  into  metres     .     .          200 

67  Metres  into  feet 202 

68  Miles  into  kilometres 204 

69  Kilometres  into  miles 206 

70  Interconversion  of  nautical  and  statute  miles  ...'...  208 

71  Continental  measures  of  length  with  their  metric  and  English 

equivalents 208 


X  TABLE    OF    CONTENTS. 

CONVERSION   OF   MEASURES    OF   TIME   AND    ANGLE. 

TABLE  PAGE 

72  Arc  into  time    .................  210 

73  Time  into  arc    .................  211 

74  Days  into  decimals  of  a  year  and  angle  .........  212 

75  Hours,  minutes  and  seconds  into  decimals  of  a  day  .....  216 

76  Decimals  of  a  day  into  hours,  minutes  and  seconds  .....  216 

77  Minutes  and  seconds  into  decimals  of  an  hour      ......  217 

78  Mean  time  at  apparent  noon      .........     ,     .     .  217 

79  Sidereal  time  into  mean  solar  time     ..........  218 

80  Mean  solar  time  into  sidereal  time      ..........  218 

MISCELLANEOUS   TABLES. 

81  Density  of  air  at  different  temperatures  Fahrenheit      «     .     .     .  220 
Density  of  air  at  different  humidities  and  pressures  —  English 

measures. 

82  Term  for  humidity:  auxiliary  to  Table  83  ......  221 

*-°-378* 


83  Values  of 

29.921  29.921 

84  Density  of  air  at  different  temperatures  Centigrade  .     .     .     .     .  224 
Density  of  air  at  different  humidities  and    pressures  —  Metric 

measures. 

85  Term  for  humidity  :   auxiliary  to  Table  86      .....  225 

86  Values  of  A  =  *~°'378g  226 

760  760 

87  Conversion  of  avoirdupois  pounds  and  ounces  into  kilogrammes    .  226 

88  Conversion  of  kilogrammes  into  avoirdupois  pounds  and  ounces  230 

89  Conversion  of  grains  into  grammes   ..........  230 

90  Conversion  of  grammes  into  grains  ..........  231 

91  Conversion  of  units  of  magnetic  intensity.     .......  231 

92  Quantity  of  water  corresponding  to  given  depths  of  rainfall  .     .  232 

93  Dates  of  Dove's  pentades     .............  232 

94  Division  by  28  of  numbers  from  28  to  867  972  ......  233 

95  Division  by  29  of  numbers  from  29  to  898971   ......  234 

96  Division  by  31  of  numbers  from  31  to  960969   ......  235 

97  Natural  sines  and  cosines    .............  236 

98  Natural  tangents  and  cotangents  ...........  238 

99  Logarithms  of  numbers    ..............  240 

100      LIST  OF  METEOROLOGICAL  STATIONS     .........  243 

APPENDIX. 

Constants     ....................  258 

Synoptic  conversion  of  English  and  metric  units      .......  260 

Dimensions  of  physical  quantities     ............  262 

International  Meteorological  Symbols    ......     .....  263 


INTRODUCTION. 

DESCRIPTION   AND    USE   OF  THE  TABLES. 


THERMOMETRICAI,   TABLES. 

COMPARISON    OP    THERMOMETRIC    SCALES. 

Conversion  of  readings  of  the  Reaumur  thermometer  to  readings 
of  the  Fahrenheit  and  Centigrade  thermometers. 

The  argument  is  given  for  every  Reaumur  degree  from  +  80°  to  —  40° 
Reaumur,  and  the  corresponding  readings  Fahrenheit  and  Centigrade  are 
given  to  hundredths  of  a  degree,  permitting  the  exact  values  to  be 
expressed.  A  column  of  proportional  parts  gives  the  values  corresponding 
to  tenths  of  a  Reaumur  degree.  By  the  help  of  the  column  of  proportional 
parts,  the  table  is  also  conveniently  used  for  converting  Fahrenheit  to 
Centigrade  and  Reaumur,  and  Centigrade  to  Fahrenheit  and  Reaumur 
throughout  the  thermometric  scale  from  the  boiling  point  of  water  to 
-60°  F.  or  —51°  C. 

The  formulae  expressing  the  relation  between  the  different  scales  are 
given  at  the  bottom  of  the  table,  where 

F°  =  Temperature  Fahrenheit. 
C°  —  Temperature  Centigrade. 

R°  =  Temperature  Reaumur. 
Examples  : 

To  convert  i8.°3  Reaumur  to  Fahrenheit  and  Centigrade. 

From  the  table,  i8.°o  R.  =       72.°5O   F.  =       22.°5o    C. 

From  column  Prop.  Parts,       0.3         =         0.675       =         °-375 

18:3   R.  =       73:2     F.  =  22:9      C. 
To  convert  147^7  Fahrenheit  to  Centigrade  and  Reaumur. 

From  the  table,  i46.°75   F.  =       6^7  $  C.    =  s 

From  column  Prop.  Parts,     0.95        =         0.53         =         0.4 


i47.°7   F.=       64?3    C.    = 
To  convert  i6.°9  Centigrade  to  Fahrenheit  and  Reaumur. 

From  the  table,  i6.°25  C.  —       61!  '2  $F.    =       i 

From  column  Prop.  Parts,       0.65       =         1.17        =        0.5 

16^9    C.  =       62.°4   F.    =       I3.°5<£. 
xi 


Xii  INTRODUCTION. 

TABLE  2.      Conversion  of  readings  of  the  Fahrenheit  thermometer  to  readings 
Centigrade. 

The  conversion  of  Fahrenheit  temperatures  to  Centigrade  temperatures 
is  given  for  every  tenth  of  a  degree  from  +  i^gF.  to  —  jotgF.  The 
side  argument  is  the  whole  number  of  degrees  Fahrenheit,  and  the  top 
argument,  tenths  of  a  degree  Fahrenheit  ;  interpolation  to  hundredths  of  a 
degree,  when  desired,  is  readily  effected  mentally.  The  tabular  values  are 
given  to  hundredths  of  a  degree  Centigrade. 

The  formula  for  conversion  is 


where  F°  is  a  given  temperature   Fahrenheit,  and  C9  the  corresponding 
temperature  Centigrade. 

Example  : 

To  convert  79^7  Fahrenheit  to  Centigrade. 
The  table  gives  directly  26f5o  C. 

For  conversions  of  temperatures  above  131°-^,  use  Table  i. 

TABLE  3.     Conversion  of  readings  of  the  Centigrade  thermometer  to  readings 
Fahrenheit. 

The  conversion  of  Centigrade  temperatures  to  Fahrenheit  temperatures 
is  given  for  every  tenth  of  a  degree  Centigrade  from  +  50°^  to  —  5o.°9  C. 
The  tabular  values  are  expressed  in  hundredths  of  a  degree  Fahrenheit. 

The  formula  for  conversion  is 


where  C"  is  a  given  temperature  Centigrade,  and  F°  the  corresponding 
temperature  Fahrenheit. 

For  conversions  of  temperatures  above  the  upper  limit  of  the  table, 
use  Tables  i  and  4. 

TABLE  4.      Conversion  of  readings  of  the  Centigrade  thermometer  near  the 
boiling  point  to  readings  Fahrenheit. 

This  is  an  extension  of  Table  3  from  9O.°o  to  ioo.°9  Centigrade. 
Example  : 

To  convert  95*74  Centigrade  to  Fahrenheit. 

From  the  table,  95°?o  C.  =  20^26  F. 

By  interpolation,  0.04        =       0.07 

95:74  C.  =  204^33  F. 


THERMOMETRICAI,  TABLES.  xiii 

Conversion  of  differences  Fahrenheit  to  differences  Centigrade.         TABLE  5. 

The  table  gives  for  every  tenth  of  a  degree  from  o°  to   2o°9  F.  the 
corresponding  lengths  of  the  Centigrade  scale. 

Conversion  of  differences  Centigrade  to  differences  Fahrenheit.  TABLE  6. 

The  table  gives  for  every  tenth  of  a  degree  from  o°  to  9^9  C.  the  corre- 
sponding lengths  of  the  Fahrenheit  scale. 

Example : 

To  find  the  equivalent  difference  in  Fahrenheit  degrees  for  a 

of  4^72  Centigrade. 

From  the  table,  4°yo  C.  =  8. "46 

From  the  table  by  moving  the  decimal  point  for  o.  2,      0.02       =0.04 


4.°72  C.  =  8.°50  F. 


REDUCTION    OF    TEMPERATURE    TO    SEA 

English  Measures.  TABLE  7. 

Metric  Measures.  TABLE  8. 

These  tables  give  for  different  altitudes  and  for  different  uniform  rates 
of  decrease  of  temperature  with  altitude,  the  amount  in  hundredths  of  a 
degree  Fahrenheit  and  Centigrade,  which  must  be  added  to  observed  tem- 
peratures in  order  to  reduce  them  to  sea  level. 

The  rate  of  decrease  of  temperature  with  altitude  varies  from  one 
region  to  another,  and  in  the  same  region  varies  according  to  the  season 
and  the  meteorological  conditions  ;  being  in  general  greater  in  warm  lati- 
tudes than  in  cold  ones,  greater  in  summer  than  in  winter,  and  greater 
in  cyclones  than  in  anti-cyclones.  For  continental  plateau  regions,  the 
reduction  often  becomes  fictitious  or  illusory.  The  use  of  the  tables  there- 
fore requires  experience  and  judgment  in  selecting  the  rate  of  decrease 
of  temperature  to  be  used. 

The  tables  are  given  in  order  to  facilitate  the  reduction  of  temperature 
either  upwards  or  downwards  in  special  investigations,  but  the  reduction  is 
not  ordinarily  applied  to  meteorological  observations. 

The  tables,  7  and  8,  are  computed  for  rates  of  temperature  change 
ranging  from  i°  Fahrenheit  in  200  feet  to  i°  Fahrenheit  in  900  feet,  and 
from  i°  Centigrade  in  100  metres  to  i°  Centigrade  in  500  metres;  and 
for  altitudes  up  to  5,000  feet  and  3,000  metres  respectively. 

Example,  Table  7  : 

Observed  temperature  at  an  elevation  of  2,  500  feet, 
Reduction  to  sea  level  for  an  assumed  decrease  in  tem- 
perature of  i°F.  for  every  300  feet, 

Temperature  reduced  to  sea  level, 


OF  THE 

UNIVERSITY 


INTRODUCTION. 


Example,  Table  8  : 

Observed  temperature  at  an  elevation  of  500  metres,  i2.°5  C. 

Reduction  to  sea  level  for  an  assumed  decrease  in  tempera- 

ture of  i°  C.  for  every  200  metres,  +2^5 


Temperature  reduced  to  sea  level,  i5.°o  C. 

CORRECTION    FOR    THE    TEMPERATURE  OP  THE    MERCURY    IN   THE  THER- 
MOMETER   STEM. 

TABLES.       Fahrenheit  thermometers  ;  Centigrade  thermometers. 

When  the  temperature  of  the  thermometer  stem  is  materially  differ- 
ent from  that  of  the  bulb,  a  correction  needs  to  be  applied  to  the  observed 
reading  in  order  to  correct  it  for  the  difference  in  the  length  of  the  mer- 
cury column  caused  by  this  difference  in  its  temperature.  This  correction 
frequently  becomes  necessary  in  physical  experiments  where  the  bulb  only 
is  immersed  in  a  bath  whose  temperature  is  to  be  determined,  and  in 
meteorological  observations  it  may  become  appreciable  in  wet-bulb,  dew 
point,  and  solar  radiation  thermometers,  when  the  temperature  of  the  bulb 
is  considerably  above  or  below  the  air  temperature. 

If  f  be  the  average  temperature  of  the  mercury  column,  t  the  observed 
reading  of  the  thermometer,  n  the  length  of  mercury  in  the  stem  in  scale 
degrees,  and  a  the  apparent  expansion  of  mercury  in  glass  for  i°,  the 
correction  is  given  by  the  expression 

_  an  (f  _  /) 

in  which,  for  Centigrade  temperatures,  a  =  0.000154  or  0.000155. 

The  average  temperature  of  the  mercury  column  can  not  be  directly 
observed  and  is  difficult  to  determine,  for  it  differs  from  the  temperature 
of  the  glass  stem  by  an  amount  depending  on  the  conduction  of  heat 
between  the  bulb  and  the  mercury  column.  Practically  however  it  is 
possible  to  use  the  actually  observed  temperature  of  the  glass  stem  as  the 
value  of  f  by  making  a  small  compensating  change  in  the  value  of  a, 
and  this  appears  to  be  the  simplest  method  that  has  been  proposed.  Mr. 
T.  B.  Thorpe  {Journal  of  the  Chemical  Society,  vol.  37,  1880,  p.  160)  has 
determined  by  a  series  of  experiments  that  the  proper  thermometric  cor- 
rections will  be  obtained  by  this  method  if  0.000143  be  used  as  a  coefficient 
(for  Centigrade  temperatures)  instead  of  the  value  of  a  given  above,  and 
this  value  has  been  adopted  in  the  present  tables. 

The  correction  formulae  are,  then, 

T=  t  —  0.0000795  n  (f  —  /)  Temperature  Fahrenheit. 
T=  t—  0.000143   n  (f  —  t)  Temperature  Centigrade, 
in  which  T=  Corrected  temperature. 
/  =  Observed  temperature. 
f  =  Mean  temperature  of  the  glass  stem. 
n  =  Length  of  mercury  in  the  stem  in  scale  degrees. 


BAROMETRICAL    TABLES.  XV 

When  f  is  than  /,  the  numerical  correction  is  to  be 


Example  : 

The  observed  temperature  of  a  black  bulb  thermometer  is  120°  4  F.,  the 
temperature  of  the  glass  stem  is  55^2  F.  and  the  length  of  mercury 
in  the  stem  is  130°  F.  To  find  the  corrected  temperature. 

With  n  =  130°  F.  and  —  /'  t  =  [—  ]  65°  F.,  as  arguments,  the  table  gives 
the  correction  ofy  F.  ,  which  by  the  above  rule  is  to  be  added  to  the 
observed  temperature.  The  corrected  temperature  is  therefore  1  2  1  f  i  F. 


BAROMETRICAL  TABLES. 

REDUCTION    TO     A     STANDARD     TEMPERATURE    OF     OBSERVATIONS    MADE 
'     WITH    BAROMETERS    HAVING    BRASS    SCALES. 

The  indicated  height  of  the  mercurial  column  in  a  barometer  varies  not 
only  with  changes  of  atmospheric  pressure,  but  also  with  variations  of  the 
temperature  of  the  mercury  and  of  the  scale.  It  is  evident  therefore  that 
if  the  height  of  the  barometric  column  is  to  be  a  true  relative  measure  of 
atmospheric  pressure,  the  observed  readings  must  be  reduced  to  the  values 
they  would  have  if  the  mercury  and  scale  were  maintained  at  a  constant 
standard  temperature. 

This  reduction  is  known  as  the  reduction  for  temperature,  and  combines 
both  the  correction  for  the  expansion  of  the  mercury  and  that  for  the  expan- 
sion of  the  scale,  on  the  assumption  that  the  attached  thermometer  gives  the 
temperature  both  of  the  mercury  and  of  the  scale. 

The  freezing  point  is  universally  adopted  as  the  standard  temperature 
of  the  mercury,  to  which  all  readings  are  to  be  reduced.  The  temperature 
to  which  the  scale  is  reduced  is  the  normal  or  standard  temperature  of  the 
adopted  standard  of  length.  For  English  scales,  which  depend  upon  the 
English  yard,  this  is  62°  Fahrenheit.  For  metric  scales,  which  depend 
upon  the  metre,  it  is  o°  Centigrade. 

As  thus  reduced,  observations  made  with  English  and  metric  barometers 
become  perfectly  comparable  when  converted  by  the  ordinary  tables  of  linear 
conversion,  viz.:  millimetres  to  inches  and  inches  to  millimetres  (see  Tables 
64,  65),  for  these  conversions  refer  to  the  metre  at  o°  Centigrade  and  the 
English  yard  at  62°  Fahrenheit. 

The  general  formula  for  reducing  barometric  readings  to  a  standard  tem- 
perature is 

Dm(f-T)-l(t-9) 


Xvi  INTRODUCTION. 

in  which  C—  Correction  for  temperature. 

B  =  Observed  height  of  the  barometric  column. 

t  =  Temperature  of  the  attached  thermometer. 
T—  Standard  temperature  of  the  mercury. 
m  =  Coefficient  of  expansion  of  mercury. 

/  =  Coefficient  of  linear  expansion  of  brass. 

0  =  Standard  temperature  of  the  scale. 

The  accepted  determination  of  the  coefficient  of  expansion  of  mercury 
is  that  given  by  Broch's  reduction  of  Regnault's  experiments,  viz  : 

m(for  i°C)  =  10-9(181792  +  0. 175 /  +  0.035116^). 
As  a  sufficiently  accurate  approximation,  the  intermediate  value 

m  =  0.0001818 

has  been  adopted  uniformly  for  all  temperatures  in  conformity  with  the  usage 
of  the  International  Meteorological  Tables. 

Various  specimens  of  brass  scales  made  of  alloys  of  different  com- 
position show  differences  in  their  coefficients  of  expansion  amounting  to 
eight  and  sometimes  ten  per  cent,  of  the  total  amount.  The  Smithsonian 
Tables  prepared  by  Prof.  Guyot  were  computed  with  the  average  value 
/(for  i °  C)  =  0.0000188  ;  for  the  sake  of  uniformity  with  the  International 
Meteorological  Tables,  the  value 

1=  0.0000184 

has  been  used  in  the  present  volume.     For  any  individual  scale,  either  value 
may  easily  be  in  error  by  four  per  cent. 

A  small  portion  of  the  tables  has  been  independently  computed,  but  the 
larger  part  of  the  values  have  been  copied  from  the  International  Meteoro- 
logical Tables,  one  inaccuracy  having  been  found  and  corrected. 

TABLE  10.     Reduction  of  the  barometer  to  standard  temperature — English 
measures. 

For  the  English  barometer  the  formula  for  reducing  observed  readings 
to  a  standard  temperature  becomes 

c=       gm(t-32°)-l  (t-62°) 
i+m(t—  32°) 

in  which  B  =  Observed  height  of  the  barometer  in  English  inches. 

/  =  Temperature  of  attached  thermometer  in  degrees  Fahrenheit 

m  —  0.0001818  X  §  =  o.oooioi 
/  =  0.0000184  X  |  =  0.0000102 

The  combined  reduction  of  the  mercury  to  the  freezing  point  and  of  the 
scale  to  62°  Fahrenheit  brings  the  point  of  no  correction  to  approximately 


BAROMETRIC AI<    TABLES .  xvii 

28.°5  Fahrenheit,  and  this  is  therefore  the  standard  temperature  to  which 
all  readings  are  reduced.  For  temperatures  above  28.°5  Fahrenheit,  the 
correction  is  subtractive,  and  for  temperatures  below  28°.  5  Fahrenheit,  the 
correction  is  additive,  as  indicated  by  the  signs  (  +  )  and  (  —  )  inserted 
throughout  the  table. 

The  table  gives  the  corrections  for  every  half  degree  Fahrenheit  from 
o°  to  ioo.°  The  limits  of  pressure  are  19  and  31.6  inches,  the  corrections 
being  computed  for  every  half  inch  from  19  to  24  inches,  and  for  every 
two- tenths  of  an  inch  from  24  to  31.6  inches. 

Example  : 

Observed  height  of  barometer 
Attached  thermometer,  54°5  F. 
Reduction  for  temperature 

Barometric  reading  corrected  for  temperature  =      29.075 


TABLE    11. 

TABLE  11.      Reduction  of  the    barometer   to    standard    temperature  —  Metric 
measures. 

For  the  metric  barometer  the  formula  for  reducing  observed  readings  to 
the  standard  temperature,  o°  C.,  becomes 


i  +  mt 

in  which  C   and  B  are  expressed   in   millimetres    and  t    in   Centigrade 
degrees. 

m  =  0.0001818  ;     /  —  0.0000184. 

In  the  tables,  the  limits  adopted  for  the  pressure  are  440  and  795  mil- 
limetres, the  intervals  being  10  millimetres  between  440  and  600  milli- 
metres, and  5  millimetres  between  600  and  795  millimetres. 

The  limits  adopted  for  the  temperature  are  o°  +  and  +  35°8,  the 
intervals  being  0^5  and  i  To  from  440  to  560  millimetres,  and  o°2  from  560 
to  795  millimetres. 

For  temperatures  above  o°  Centigrade  the  correction  is  negative,  and 
hence  is  to  be  subtracted  from  the  observed  readings. 

For  temperatures  below  o°  Centigrade  the  correction  is  positive,  and 
from  o°  C.  down  to  —  20°  C.  the  numerical  values  thereof,  for  ordinary  baro- 
metric work,  do  not  materially  differ  from  the  values  for  the  corresponding 
temperatures  above  o°  C.  Thus  the  correction  for  —  9°  C.  is  numerically 
the  same  as  for  +  9°  C.  and  is  taken  from  the  table.  In  physical  work  of 
extreme  precision,  the  numerical  values  given  for  positive  temperatures  may 
be  ^tised  for  temperatures  below  o°  C.  by  applying  to  them  the  following 
corrections  : 


XV111 


INTRODUCTION. 


Corrections  to  be  applied  to  the  tab2ilar  values  of  Table  11  in  order  to  use  them 
when  the  temperature  of  the  attached  thermometer  is  below  o°  Centigrade. 


Temper- 
ature. 

PRESSURE  IN  MILLIMETRES. 

450 

500 

550 

600 

650 

700         750 

800 

C. 

mm. 

mm. 

mm.             mm. 

mm. 

mm. 

mm. 

mm. 

-   i° 

0.00 

0.00 

0.00 

0.00 

0.00 

0.00 

o.oo 

0.00 

'  -  9 

.OO 

.00 

.00 

.00 

.00 

.00 

.00 

.00 

—  10 

0.00 

0.00 

0.00 

0.00 

0.00 

+  O.OI 

+  0.01 

+  0.01 

ii 

.00 

.00 

.00 

.00 

+  0.01 

.01 

.01 

.01 

12 

.00 

.00 

.00 

+  0.01 

.01 

.01 

.01 

.01 

13 

.00 

.00 

+  0.01 

.01 

.01 

.01 

.01 

.01 

-14 

.00 

+  0.01 

.01 

.01 

.01 

.01 

.01 

.01 

-15 

+  0.01 

+  0.01 

+  0.01 

+  0.01 

+  0.01 

+  0.01 

+  0.01 

+  0.01 

16 

.01 

.01 

.01 

.01 

.01 

.01 

.01 

.01 

17 

.01 

.01 

.01 

.01 

.01 

.01 

.01 

.02 

18 

.01 

.01 

.01 

.01 

.01 

.01 

.01 

.02 

-19 

.01 

.01 

.01 

.01 

.01 

.01 

.02 

.02 

—  20 

+  0.01 

+  0.01 

+  0.01 

+  0.01 

+  0.01 

+  0.02 

+  0.02 

+  0.02 

21 

.01 

.01 

.01 

.02 

.02 

.02 

.02 

.02 

22* 

.01 

.01 

.02 

.02 

.02 

.02 

.02 

.02 

23 

.01 

.02 

.02 

.02 

.02 

.02 

.02 

.02 

-24 

.01 

.02 

.02 

.02 

.02 

.02 

.02 

•03 

Example : 

Observed    height    of    barometer,    763.  \^mm-\     Temperature   of    the 

attached  thermometer,  — 12°  C. 

Numerical  value  of  the  reduction  for  +  12°  C  1.50 

Correction  for  temperature  below  o°  C.  =+     o.oi 

Reduction  for  —  12°  C. 
Observed  height  of  barometer 

Barometer  corrected  for  temperature 


=     764.68 


REDUCTION     OF     THE     BAROMETER     TO     STANDARD     GRAVITY 
AT    LATITUDE    45° 

The  atmospheric  pressure  is  measured  by  the  weight  of  the  mer- 
curial column  of  the  barometer,  but  by  common  usage  the  pressures  are 
expressed  in  terms  of  the  height  of  the  barometric  column  instead  of  by 
its  weight.  The  observed  height  however  is  not  a  true  measure  of  the 
pressure,  because  it  changes  with  the  temperature  of  the  mercury  and 
with  the  variations  in  the  value  of  gravity.  Therefore  to  obtain  a  height 
that  shall  be  a  true  relative  measure  of  the  atmospheric  pressure,  the  ob- 
served height  of  the  mercurial  column  must  be  reduced  to  that  which 
would  be  measured  at  a  standard  temperature  and  under  a  uniform  stand- 
ard value  of  gravity. 


BAROMETRICAL    TABLES.  xix 

The  standard  value  of  gravity  adopted  is  that  prevailing  at  latitude 
45°  and  sea  level.  The  reduction,  accordingly,  consists  of  two  parts  —  a 
correction  for  altitude  and  a  correction  for  latitude.  The  gravity  correc- 
tion for  altitude  is  usually  combined  with  the  reduction  of  the  barometer 
to  sea  level  ;  the  gravity  correction  for  latitude,  which  is  here  given,  is 
commonly  called  simply  the  "  gravity  correction,"  or  the  "  reduction  to 
standard  gravity." 

If  B$  and  B^  represent  the  barometric  heights  (corrected  for  tem- 
perature) at  latitudes  <£  and  45°,  and  g^  g^  the  acceleration  of  gravity 
at  these  latitudes,  we  have 


and  the  correction  to  the  observed  height  will  be 


If  the  earth  be  an  ellipsoid  of  revolution  composed  of  homogeneous 
homofocal  layers  arranged  according  to  any  law  of  density, 


in  which  k  is  a  constant  depending  on  the  ellipticity  of  the  earth  ;   and 
the  correction  becomes 

C  —  —  k  cos  2  <j>  BJ>. 

The  value  of  k  adopted  here  is  that  determined  by  Prof.  Harkness,* 

k  =  0.002662. 

The  correction  is  the  same  numerically  for  <£  =  45°  +  a  and  <j>  =  45°  —  a. 
It  is  negative  for  latitudes  below  45°  and  positive  for  latitudes  above  45.° 

TABLES    12,13. 

TABLE  12  (English  measures}  gives  the  correction  in  thousandths  oi 
an  inch  for  every  degree  of  latitude  and  for  each  inch  of  barometric  pres- 
sure from  19  to  30  inches. 

TABLE  13   (Metric  measures}   gives  the  correction  in  hundredths  of  a 
millimetre  for  each  20  millimetres  barometric  pressure  from  520  to  770  mil- 
limetres. 
Example  : 

Barometric  reading  (corrected  for  temperature)  at  Dodge 

City,  latitude  37°  45',  =     27.434 

Gravity  correction  for  latitude  from  Table  12,  =—  0.018 

Barometer  reduced  to  latitude  45°,  =    27.416 

*WM.  HARKNESS:  The  solar  parallax  and  Us  related  constants.  Washington, 
1891,  4°,  pp.  169. 


XX  INTRODUCTION. 

REDUCTION  OP  THE    BAROMETER    TO   SEA  I,EVEI<. 

The  fundamental  formula  for  reducing  the  barometer  to  sea  level  and 
for  determining  heights  by  the  barometer  is  the  original  formula  of  I^aplace, 
amplified  into  the  following  form  — 


in  which  h  •=  Height  of  the  upper  station. 
h0  =  Height  of  the  lower  station. 
Z=k-h0. 

p  =  Atmospheric  pressure  at  the  upper  station. 
p0  =  Atmospheric  pressure  at  the  lower  station, 
R  =  Mean  radius  of  the  earth. 

6  —  Mean  temperature  of  the  air  column  between  the  altitudes 
h  and  h0. 

e  —  Mean  pressure  of  aqueous  vapor  in  the  air  column. 

b  =  Mean  barometric  pressure  of  the  air  column. 

<#>  =  latitude  of  the  stations. 
K=  Barometric  constant. 

a  =  Coefficient  of  the  expansion  of  air. 

k  —  Constant  depending  on  the  figure  of  the  earth. 

The  pressures  p0  and  /  are  computed  from  the  height  of  the  column  of 

T) 

mercury  at  the  two  stations  ;  the  ratio  -^  of  the  barometric  heights  may  be 

JL> 

substituted  for  the  ratio  ^7,  if  B0  and  B  are  reduced  to  the  values  that  would 

P 

be  measured  at  the  same  temperature  and  under  the  same  relative  value  of 
gravity. 

The  correction  of  the  observed  barometric  heights  for  instrumental  tem- 
perature is  always  separately  made,  but  the  correction  for  the  variation  of 
gravity  with  altitude  is  generally  introduced  into  the  formula  itself. 

If  B0,  B  represent  the  barometric  heights  corrected  for  temperature  only, 
we  have  the  equation 

Z 


being  a  constant  depending  on  the  variation  of  gravity  with  altitude. 


Since  -=?-  is  a  very  small  fraction,  we  may  write 


M  being  the  modulus  of  common  logarithms. 


BAROMETRICAL    TABLES.  xxi 

D 

By  substituting  for  Z  its  approximate  value  Z=K  log  -=?,  we  have 

Jo 


With  these  substitutions  the  barometric  formula  becomes 
Z-AT(x  +^(^= 


o  +< 


As  a  further  simplification  we  shall  put 

c 

ft  =  0.378  —>   y  =  k  cos  2<£  and  17  =  £=-  ^/, 
0  K 


and  write  the  formula  — 


+A)(I  +  ,)iog§. 

j\.    /  jj 


Values  of  the  constants. — The  barometric  constant  K  is  a  complex 
quantity  defined  by  the  equation 


Bn  is  the  normal  barometric  height  of  L,aplace,  760  mm. 

A  is  the  density  of  mercury  at  the  temperature  of  melting  ice.  M. 
Marek  ( Travaux  et  Memoires  du  Bureau  international  des  Poids  et  Mesures, 
t.  II,  p.  D  55)  gives  the  value,  A  =  13.5956,  and  finds  that  different 
specimens  of  mercury  purified  by  different  processes  differ  from  this  by 
several  units  in  the  fourth  decimal.  The  International  Meteorological 
Committee  have  taken  the  value 

A  =  13.5958, 
and  for  the  sake  of  uniformity  this  value  is  here  adopted. 

8  is  the  density  of  dry  air  at  o°  C.  and  under  the  pressure  of  a  column 
of  mercury  Bn  at  the  sea  level  and  at  latitude  45.°  The  value  adopted 
by  the  International  Bureau  of  Weights  and  Measures  (  Travaux  et  Mtmoires, 
t.  i,  p.  A  54)  is 

8  =  0.001293052. 

M  (the  modulus  of  common  logarithms)  =  0.4342945. 
These  numbers  give  for  the  value  of  the  barometric  constant 
K=  1 840x5  metres. 


INTRODUCTION. 

For  the  remaining  constants,  the  following  values  have  been  used : 

0  =  0.00367  for  i°  Centigrade.     (International  Bureau  of  Weights  and 

Measures  :     Travaux  et  Memoires,  t.  I,  p.  A  54.) 
y  =  k  cos  2  <j>  —  0.002662  cos  2  <#>.     (Harkness  :   The  solar  parallax,  etc.t 

see  p.  xix.) 
R  =  6367324  metres.     (A.  R.  Clarke  :    Geodesy,  8°,  Oxford,  1880.) 

17=  **          =0.002396.     (Ferrel:     Report  Chief  Signal  Officer,    1885, 

Pt.  2,  p.  393-) 
In  reducing  the  barometer  to  sea-level,  h0=o,  and  the  factor  fi  +  °\ 

rp 

becomes  (i  +  -=  I.      Taking  the  product  of   this  factor  and    K  (i  -f  aft) 
(i  +  #),  and  neglecting  the  term  in  OZ,  the  formula  becomes 
in  metric  measures 

Z  (metres)  =  (18444  +  67-53  #  c'  +  0.003  Z)  |^-^)  (i  +  r)  log  ~° , 
and  in  English  measures 

Z  (feet)  =  (56573  +123.1  V  F-  +  0.003  Z)  (7^3)  (i  +  7)  log  -jj  • 

The  form  adopted  for  the  tables  is  that  of  M.  Angot* 

Taking  the  formula  in  English  measures,  let 


56573  +  123-10  +  0.003  Z    i  +  ft 

n 

Then  disregarding  the  small  correction  for  gravity,  m  =  log  -  °  gives  an 

approximate  value  of  B0,  and  the  correction  to  be  added  to  the  observed 
pressure  to  obtain  the  sea-level  pressure  is 

If  m^  be  the  value  of  m  corrected  for  gravity,  we  have 

m 
m^  =  — —  or,  approximately,  —m  —  my. 

The  correction  for  gravity  is  therefore  made  by  applying  to  the  approxi- 
mate value  m  the  small  correction  my.  With  this  corrected  value  of  m,  the 
reduction  to  sea-level  is  given  by  the  expression 

B(iQm—  i). 

The  above  fraction  designated  m  contains  the  altitude  Z>  the  mean 
temperature  0,  and  the  humidity  factor  —  Tr^-t     ^n  t^ie  Smithsonian  tables, 

*A.  ANGOT  :  Annales  du  Bureau  Central  Meteor ologique.    Annde  1878,  t.  I,  p.  C.  13. 

fin  the  humidity  factor,  when  the  temperature  is  below  7S°F,  i  —  ft  = — J— - .    At 

1  +  P 
higher  temperatures,  the  substitution  is  incorrect,  and  the  more  general  form  m  = 

56573  +  i2*7/+«3Z   is  therefore  used  on  PaSes  6°-68'  78-89- 


BAROMETRICAL   TABLES. 


XX111 


meteorological  and  physical,  by  Dr.  A.  Guyot,  the  distinguished  author 
in  treating  of  this  humidity  factor  in  connection  with  hypsometric  tables 
took  the  following  position  : 

"  To  introduce  a  separate  correction  for  the  expansion  of  aqueous  vapor 
is,  in  the  writer's  view,  a  doubtful  improvement.  The  laws  of  the  distri- 
bution and  transmission  of  moisture  through  the  atmosphere  are  too  little 
known,  and  its  amount,  especially  in  mountain  regions,  is  too  variable,  and 
depends  too  much  upon  local  winds  and  local  condensation,  to  allow  a 
reasonable  hope  of  obtaining  the  mean  humidity  of  the  layer  of  air  between 
the  two  stations  by  means  of  hygrometrical  observations  made  at  each  of 
them.  These  doubts  are  confirmed  by  the  experience  of  the  author  and 
of  many  other  observers,  which  shows  that,  on  an  average,  L/aplace's 
method  works  not  only  as  well  as  the  other,  but  more  uniformly  well.  At 
any  rate  the  gain,  if  there  be  any,  is  not  clear  enough  to  compensate  for 
the  undesirable  complication  of  the  formula. ' ' 

Since  this  position  was  taken  by  Dr.  Guyot  forty  years  ago,  there  has 
been  no  such  advance  in  our  knowledge  as  to  impair  the  practical  conclusion 
in  conformity  with  which  he  constructed  his  hypsometric  table.  Accord- 
ingly in  treating  this  portion  of  the  formula  in  the  construction  of  the 
present  tables  for  the  reduction  of  the  barometer  to  sea  level,  it  has  been 
deemed  advantageous  to  retain  the  method  adopted  by  Guyot,  and  to 
incorporate  the  humidity  factor  in  the  temperature  term,  thereby  assum- 
ing the  air  to  contain  the  average  degree  of  humidity  corresponding  to  the 
actually  prevailing  condition  of  temperature. 

In  evaluating  the  humidity  factor  as  a  function  of  the  air  temperature, 
the  tables  given  by  Prof.  Ferrel  have  been  adopted  {Meteorological  researches. 
Part  iii. — Barometric  hypsometry  and  reduction  of  the  barometer  to  sea  level. 
Report,  U.  S.  Coast  Survey,  1881.  Appendix  10.)  These  tables  by  inter- 
polation, and  by  extrapolation  below  o°  /**.,  give  the  following  values  for  /9: 

For  Fahrenheit  temperatures, 


0 

ft 

e 

ft 

0 

ft 

$ 

ft 

F. 

F. 

F. 

F. 

-20° 

0.00008 

10° 

0.00104 

36° 

0.00267 

62° 

0.00724 

-16 

.00020 

12 

.00111 

38 

.00293 

64 

.00762 

—  12 

.00032 

14 

.00118 

40 

.00322 

66 

.00801 

-  8 

.00044 

16 

.00126 

42 

•00353 

68 

.00839 

18 

.00134 

44 

.00386 

70 

.00877 

-  6 

0.00050 

20 

.00143 

46 

.00421 

72 

.00914 

-  4 

.00056 

22 

.00153 

48 

.00458 

—  2 
0 

.OOO62 
.00068 

li 

.00163 
.00174 

50 
52 

.00496 
•00534 

S 

0.00990 
.01065 

+  2 

.00075 

28 

.00187 

54 

.00572 

84 

.01141 

4 

.00082 

30 

.00203 

56 

.00610 

88 

.01217 

6 

.00089 

32 

.00222 

58 

.00648 

92 

.01293 

8 

0.00096 

34 

0.0243 

60 

.00686 

96 

.01369 

INTRODUCTION. 

For  Centigrade  temperatures, 


0 

ft 

e 

0 

0 

8 

c. 

c. 

c. 

-18° 

O.OOO7 

0° 

0.0022 

18° 

0.0077 

-16 

.0008 

+  2 

.0026 

20 

.0084 

-14 

.0009 

4 

.0031 

22 

.0091 

—  12 

.0010  + 

6 

.0037 

24 

.0097  + 

—  10 

.0012 

8 

.0043 

26 

.0104 

-  8 

.0013 

10 

.0050 

28 

.0111 

-  6 

.0015 

12 

.0056 

30 

.0118 

-  4 

.0017 

14 

.0063 

32 

.0125 

—  2 

.0019 

16 

.0070 

34 

.0132 

36 

.0139 

The  practical  tables  consist  essentially  of  two  mutually  dependent 
parts :  —  the  first  gives  values  of  2000  m  in  a  table  of  double  entry  of 
which  the  altitude  of  the  station  and  the  mean  temperature  of  the  air 
between  the  station  and  sea  level  are  the  arguments ;  the  second  gives  the 
reduction  to  sea  level  in  a  table  of  double  entry  of  which  the  arguments 
are  2000  m  and  the  observed  barometric  height  corrected  for  temperature. 
In  addition,  a  subsidiary  table  gives  the  small  correction  for  latitude  to 
be  applied  to  the  values  of  2000  m.  This  correction,  while  of  theoretical 
interest,  seldom  becomes  of  practical  importance,  since  its  effect  is  in 
general  overshadowed  by  the  relatively  large  uncertainties  incident  to  the 
determination  of  the  true  mean  temperature. 

The  mean  temperature  of  the  air  column  is  to  be  obtained  from  the 
observed  temperature  at  the  station  by  employing  some  assumption  as  to 
the  rate  of  change  of  temperature  with  altitude.  In  the  discussion  of 
barometric  observations  made  in  the  mountain  and  plateau  regions  of  the 
United  States,  it  has  been  found  that  this  rate  of  change  is  a  climatic  factor 
which  needs  to  be  determined  for  every  station  for  different  seasons  of  the 
year,  and  for  different  atmospheric  conditions.  When  the  results  of  such 
investigations  are  embodied  in  tables  for  reduction  to  sea  level,  the  tables  and 
the  method  of  their  use  may  be  simplified  and  the  labor  of  obtaining  the 
reduction  greatly  abridged ;  but  in  the  nature  of  the  case,  these  special 
methods  can  not  be  utilized  in  the  construction  of  general  tables  which 
are  to  be  applicable  to  all  phases  of  topography  and  climate. 

Whatever  method  be  used  for  obtaining  the  mean  temperature  of  the 
air  column  (0)  from  the  observed  temperature  at  the  station,  the  former 
and  hence  the  latter  is  subject  to  the  important  condition  that  it  shall  not 
contain  the  diurnal  fluctuation.  Hence  in  reducing  to  sea  level  any  indi- 
vidual observation  of  the  barometer,  the  simultaneous  observation  of  air 
temperature  used  in  obtaining  0  should  be  reduced  to  the  daily  mean  by 
a  correction,  or,  better,  the  actual  mean  temperature  of  the  preceding  twenty- 
four  hours  should  be  taken. 


BAROMETRICAL    TABLES.  XXV 

TABLES  14,  15,  16. 

TABLES  14,  15,  16.      Reduction    of   the    barometer  to    sea    level — English 

measures* 

Table  14  gives  values  of  2000  x  m. 

4  Z  i 


56573  +  123- 1  0  +  0.003  Z    i  +  ft 

The  temperature  0  varies  by  intervals  of  2°  from  —20°  F.  to  96"  F.t 
except  near  the  extremities  of  the  table  where  the  interval  is  4!  The  alti- 
tude Z  varies  by  intervals  of  100  feet  from  100  to  9000  feet.  The  values 
of  2000  m  are  given  to  one  decimal. 

In  order  to  facilitate  interpolations  for  *r actions  of  a  100  feet  in 
altitude,  the  tabular  differences  for  100  feet  have  been  added  on  each  line. 

Table  15  gives  a  small  correction  to  2000  m  for  latitude,  computed 
from  the  expression 

2OOom  x  0.002662  cos  2  <f>. 

The  arguments  are  2000  m,  which  varies  by  tens  from  10  to  350,  and 
the  latitude,  which  varies  by  5°  from  o°  to  90?  The  correction  is  to  be 
subtracted  for  latitudes  below  45°  and  added  for  latitudes  above  45.°  The 
tabular  values  are  given  to  one  decimal. 

Table  16,  with  the  value  of  2000  m  thus  corrected,  gives  the  correction 
which  must  be  applied  to  the  barometric  reading  B  (corrected  for  tem- 
perature) to  reduce  it  to  sea  level.  The  arguments  are  B,  which  varies  by 
0.5  inch  from  31.00  inches  to  19.5  inches,  and  values  of  2000  m,  which  are 
given  for  every  unit  from  i  to  334. 

The  reduction  values  B0  —  B  are  given  to  o.oi  inch. 

Example  : 

I^et  #  =  26.24  inches  be  the  barometric  reading  (corrected  for  temper- 
ature) observed  at  a  station  whose  altitude  is  3572  feet,  and  latitude 
32.°  Suppose  the  mean  temperature  of  the  air  column  0  =  63*0  F. 

Table  14  gives  (p.  63)  with  Z=  3, 500  feet  and  6  =  62.°8  F. ,  2000  m  =  108.0 
The  difference  for  72  feet  is  2.2 

The  approximate  value  of  2000  ra  is  110.2 

Table  15,  with  2000  m  —  no  and  latitude  =  32°,  gives  the  subtractive 
correction  o.i.  Hence  the  corrected  value  of  2000  m  is  no.i. 

With  2000^  =  110.1  and  #  =  26.24,  Table  16  (p.  72)  gives  the  reduc- 
tion to  sea  level,  3.55  inches.  Accordingly  the  barometric  pressure  reduced 
to  sea  level  is 

#0  =  26.24  +  3-55  =  29-79  inches. 


XXvi  INTRODUCTION. 

TABLES  17,  18,  19.     Reduction  of  the  barometer  to  sea  level — Metric  measures. 

For  reducing  to  sea  level  readings  of  the  metric  barometer,  the  baro- 
metric formula  in  metric  measures  derived  on  page  xxii  is  treated  in  the 
same  manner  as  the  formula  in  English  measures  just  described  in  detail, 
and  the  method  of  construction  of  the  tables  is  the  same. 

Table  17  gives  values  of  2000  m. 

Z  i 


m  = 


18444  4-  67.53  0  +  0.003  z 


The  temperature  0  varies  by  intervals  of  2°  from  — 16°  C.  to  +  36°  C. 
except  near  the  extremities  of  the  table  where  the  interval  is  4.°  The  alti- 
tude Z  varies  by  10  metres  from  10  to  3000  metres.  The  values  of  2000  m 
are  given  to  one  decimal. 

Table  18  gives  the  small  correction  to  2000  m  for  latitude.  The  argu- 
ments are  2000  m,  which  varies  by  tens  from  10  to  350,  and  the  latitude 
which  varies  by  5°  from  o°  to  90?  The  correction  is  to  be  subtracted  for 
latitudes  below  45°  and  added  for  latitudes  above  45.°  The  tabular  values 
are  given  to  one  decimal.  The  value  of  2000  m  thus  corrected  is  then  used 
in  entering  Table  19. 

Table  19  gives  the  correction  which  must  be  applied  to  the  barometric 
reading  B  (corrected  for  temperature)  to  reduce  it  to  sea  level.  The  argu- 
ments are  B,  which  varies  by  lomm.  from  790  mm.  to  480 mm.,  and  values 
of  2000  m  which  vary  by  units  from  i  to  345.  The  tabular  values  B0  —  B 
are  given  to  o.  i  mm. 

Example  : 

lyet  B=  648.7mm.  be  the  barometric  reading  observed  and  corrected 
for  temperature  at  a  station  whose  altitude  is  1353  metres  and  latitude 
32.°  Suppose  the  mean  temperature  of  the  air  column  0  =  i4?3  C. 

Table  17  gives  (p.  83)  for  0  ==  14°  and  Z=-- 1353,      2000  m  =  138.6 
The  proportional  part  for  o.°3  is  .15 

Hence  the  approximate  value  of  2000  m  is  *  3^.45 

Table  18,  with  2000  m=  138  and  latitude  32°,  gives  the  subtractive 
correction  0.15.  Hence  the  corrected  value  of  2000 m  is  138.3.  With  this 
value  and  B  =  649  mm.  as  arguments,  Table  19  gives  B0  —  B  =  112.0  mm. 

Accordingly  the  barometric  reading  reduced  to  sea  level  is 

^  =  648.7+  1 12. 0  =  760. 7  mm. 

THE    DETERMINATION    OF    HEIGHTS    BY    THE    BAROMETER. 

TABLES  2O,  21,  22,  23,  24.    English  Measures. 

The  barometric  formula  developed  in  the  preceding  section  (see  p.  xxi) 
is  arranged  in  the  following  form  for  determining  heights  by  the  barometer. 


BAROMETRICAL    TABLES. 


XXV11 


(x+ffi 

l  +k  C 


R 


in  which  A^(log  #0  —  log  B)  is  an  approximate  value  of  Z  and  the  factors 
iu  the  brackets  are  correction  factors  depending  respectively  on  the  air 
temperature,  the  humidity,  the  variation  of  gravity  with  latitude,  the  varia- 
tion of  gravity  with  altitude  in  its  effect  on  the  weight  of  mercury  in  the 
barometer,  and  the  variation  of  gravity  with  altitude  in  its  effect  on  the 
weight  of  the  air.  With  the  constants  already  given,  the  formula  becomes 
in  English  measures : 


Z  (feet)  =  60368  (log  B.  -  log  B) 


[i  +  0.002039  (0  —  32°)] 
(i.+  fl 

(l  +  0.002662  COS  2<£)  (l  +  0.00239) 


In  order  to  make  the  temperature  correction  as  small  as  possible  for 
average  air  temperatures,  50°  F.  will  be  taken  as  the  temperature  at  which 
the  correction  factor  is  zero.  This  is  accomplished  by  the  following  trans- 
formation : 

i  +  0.002039  (0  —  32°)  =  C1  +  0.002039  (0  —  50°)]  [i  +  0.0010195  x  36°]. 

The  second  factor  of  this  expresssion  combines  with  the  constant,  and 
gives  60368  (i  +0.0010195  x  36°)  =  62583.6. 

The  first  approximate  value  of  Z  is  therefore 

62583.6  (log  B0- log  B). 

In  order  further  to  increase  the  utility  of  the  tables,  we  shall  make  a 
further  substitution  for  log  B0  —  log  B,  and  write 

62583.6  (log  B0  -  log  B)  =  62583.6  log  (^  -  log  ^ 
Table  20  contains  values  of  the  expression 

62583.6  log  ?|2 

for  values  of  B  varying  by  intervals  of  o.oi  inch  from  12.00  inches  to  30.90 
inches. 

The  first  approximate  value  of  Z  is  then  obtained  by  subtracting  the 
tabular  value  corresponding  to  B0  from  the  tabular  value  corresponding  to 
B  (B  and  B0  being  the  barometric  readings  observed  and  corrected  for 
temperature  at  the  upper  and  lower  stations  respectively). 


XXViii  INTRODUCTION. 

Table  21  gives  the  temperature  correction 

ZY.  0.002039  (0  —  50°). 

The  side  argument  is  the  mean  temperature  of  the  air  column  (0)  given 
for  intervals  of  i°  from  o°  to  100°  F.  The  top  argument  is  the  approximate 
difference  of  altitude  Z  obtained  from  Table  20. 

For  temperatures  above  50°  F. ,  the  correction  is  to  be  added,  and  for 
temperatures  below  50°  F.,  the  correction  is  to  be  subtracted.  It  will  be 
observed  that  the  correction  is  a  linear  function  of  Z,  and  hence,  for  example, 
the  value  for  Z—  1740  is  the  sum  of  the  corrections  in  the  columns  headed 
1000,  700,  and  40. 

In  general,  accurate  altitudes  can  not  be  obtained  unless  the  temperature 
used  is  freed  from  diurnal  variation. 

Table  22  gives  the  correction  for  latitude,  and  for  the  variation  of  gravity 
with  altitude  in  its  effect  on  the  weight  of  the  mercury.  When  altitudes 
are  determined  with  aneroid  barometers  the  second  factor  does  not  enter  the 
formula.  In  this  case  the  effect  of  the  latitude  factor  can  be  obtained 
by  taking  the  difference  between  the  tabular  value  for  the  given  latitude  and 
the  tabular  value  for  latitude  45!  The  side  argument  is  the  latitude  of  the 
station  given  for  intervals  of  2.°  The  top  argument  is  the  approximate 
difference  of  height  Z. 

Table  23  gives  the  correction  for  the  average  humidity  of  the  air  at 
different  tern  peratures ;  the  values  of  the  factor  (i  +  ft)  adopted  by  Prof. 
Ferrel  and  given  on  page  xxiii  have  been  used.  This  correction  could  have 
been  incorporated  with  the  temperature  factor  in  Table  21,  but  it  is  given 
separately  in  order  that  the  magnitude  of  the  correction  may  be  apparent, 
and  in  order  that,  when  the  actual  humidity  is  observed,  the  correction  may 
be  computed  if  desired,  by  the  expression 


Z  (0.378  I 


where  e  is  the  mean  pressure  of  vapor  in  the  air  column,  and  b  the  mean 
barometric  pressure. 

The  side  argument  is  the  mean  temperature  of  the  air  column,  varying 
by  intervals  of  2°  from  —  20°  F.  to  96°  F.,  except  near  the  extremities  of  the 
table  where  the  interval  is  4?  The  top  argument  is  the  approximate 
difference  of  altitude  Z. 

Table  24  gives  the  correction  for  the  variation  of  gravity  with  altitude 
in  its  effect  on  the  weight  of  the  air.  The  side  argument  is  the  approximate 
difference  of  altitude  Z,  and  the  top  argument  is  the  elevation  of  the  lower 
station  h0. 

The  corrections  given  by  Tables  22,  23  and  24  are  all  additive. 


BAROMETRICAL    TABI^S.  XXIX 

Example  : 


the  barometric  pressure  observed,  and  corrected  for  temperature, 
at  the  upper  and  lower  stations  be,  respectively,  B  =  23.61  and 
B0  =  29.97.  I^et  the  mean  temperature  of  the  air  column  be  35°  F., 
and  the  latitude  44°  16'.  To  determine  the  difference  of  height. 

Feet. 

Table  20,  argument  23.61,  gives  6420 

Table  20,         "          29.97,     "  —     64 

Approximate  difference  of  height  (Z)  =  6484 

Table  21,  with  Z=  6484  and  6  =  35°  F.,  gives  —    198 

Table  22,  with  Z=  6300  and  <#>  =  44°,  gives  +      16 

Table  23,  with  Z—  6300  and  0  =  35.°  F.,  gives  +      17 

Table  24,  with  Z=  6300  and  k0  —  o,  gives  -f       2 

Final  difference  of  height  (Z)  =  6321 

If  in  this  example  the  barometric  readings  be  observed  with  aneroid 
barometers,  the  correction  to  be  obtained  from  Table  22  will  be  simply  the 
portion  due  to  the  latitude  factor,  and  this  will  be  obtained  by  subtracting 
the  tabular  value  for  45°  from  that  for  44°,  the  top  argument  being  Z=  6300. 
This  gives  16—15  =  1. 

TABLES  25,  26,  27,  28,  29.     Metric  Measures. 

The  barometric  formula  developed  on  page  xxi  is,  in  metric  units, 


Z  (metres)  =  18400  (log  B0  —  log  B) 


(i  +  0.00367  e  c.) 

(1+0.378!) 

(l  +  O.00266 COS  2</>)  (l  +  O.OO239) 


1  + 


6  367  323 


The  approximate  value  of  Z  (the  difference  of  height  of  the  upper  and 
lower  station)  is  given  by  the  factor  18400  (log  B0  —  log  B}.  This  expression 
is  computed  by  means  of  two  entries  of  a  table  whose  argument  is  the 
barometric  pressure.  In  order  that  the  two  entries  may  result  at  once  in  an 
approximate  value  of  the  elevation  of  the  upper  and  lower  stations,  a 
transformation  is  made,  which  gives  the  following  identity: 

18400  (log  B0  -  log  B)  =  18400  (log  ^  -  log  ^?)  • 

TA«*LE    25 

Table  25  gives  values  of  the  expression  18400  log^  for  values  of  B 

£> 

varying  by  intervals  of  i  mm.  from  300  mm.  to  779  mm.  The  first  approxi- 
mate value  of  Zis  then  obtained  by  subtracting  the  tabular  value  corresponding 
to  B0  from  the  tabular  value  corresponding  to  B  (B  and  B0  being  the 
barometric  readings  observed  and  reduced  to  o°  C.  at  the  upper  and  lower 


XXX  INTRODUCTION. 

stations  respectively).  The  first  entry  of  Table  25  with  the  argument  B 
gives  an  approximate  value  of  the  elevation  of  the  upper  station  above 
sea  level,  and  the  second  entry  with  the  argument  B0  gives  an  approximate 
value  of  the  elevation  of  the  lower  station. 

Table   26  gives  the  temperature  correction  :  0.00367  &  C.  x  Z. 

The  side  argument  is  the  approximate  difference  of  elevation  Z  and  the 
top  argument  is  the  mean  temperature  of  the  air  column.  The  values  of  Z 
vary  by  intervals  of  100  m.  from  100  to  4000  metres  and  the  temperature 
varies  by  intervals  of  i°  from  i°  C.  to  10°  C.  with  additional  columns  for  20°, 
30°,  and  40°  C.  Attention  is  called  to  the  fact  that  the  formula  is  linear 
with  respect  to  0,  and  hence  that  the  correction,  for  example,  for  27°  equals 
the  correction  for  20°  plus  the  correction  for  7.°  When  the  table  is  used  for 
temperatures  below  o°  C.,  the  tabular  correction  must  be  subtracted  from, 
instead  of  added  to,  the  approximate  value  of  Z. 

Table  27  (pp.  1 12  and  1 1 3)  gives  the  correction  for  humidity  resulting 

from  the  factor  0.378  -=•  x  Z=  ft  Z. 

Page  112  gives  the  value  of  0.378  -  multiplied  by  10000.     The  side 

argument  is  the  mean  pressure  of  aqueous  vapor,  <?,  which  serves  to  repre- 
sent the  mean  state  of  humidity  of  the  air  between  the  two  stations. 
e=%  (/+/o)  0/and/0  being  the  vapor  pressures  observed  at  the  two  stations) 
has  been  written  at  the  head  of  the  table,  but  the  value  to  be  assigned  to  e 
is  in  reality  left  to  the  observer,  independently  of  all  hypothesis.  The  top 
argument  is  the  mean  barometric  pressure  -j-  (B  +  j£0). 

The  vapor  pressure  varies  by  millimetres  from  i  to  40,  and  the  mean 
barometric  pressure  varies  by  intervals  of  20  mm.  from  500  mm.  to  760  mm. 

The  tabular  values  represent  the  humidity  factor  ft  or  0.378-^,  multiplied  by 

IOOOO. 

Page  113  gives  the  correction  for  humidity,  with  Z  and  10000  x  0.378  T 

(derived  from  page  112)  as  arguments. 

The  approximate  difference  of  altitude  is  given  by  intervals  of  100 
metres  from  100  to  4000  metres,  and  the  values  of  looooft  vary  by  intervals 
of  25  from  25  to  300.  The  tabular  values  are  given  in  tenths  of  metres  to 
facilitate  and  increase  the  accuracy  of  interpolation. 

Table  28  gives  the  correction  for  latitude,  and  for  the  variation  of 
gravity  with  altitude  in  its  effect  on  the  weight  of  the  mercurial  column. 
When  altitudes  are  determined  with  aneroid  barometers,  the  latter  factor 
does  not  enter  the  formula.  In  this  case  the  effect  of  the  latitude  factor 
can  be  obtained  by  subtracting  the  tabular  value  for  latitude  45°  from  the 
tabular  value  for  the  latitude  in  question. 

The  side  argument  is  the  approximate  difference  of  elevation  Z,  varying 
by  intervals  of  100  metres  from  100  to  4000.  The  top  argument  is  the 
latitude  varying  by  intervals  of  5°  from  o°  to  75° 


>^V-'°         "  V'^^ 

f-         "     OF  THE 

I  UNIVERSITY 


BAROMETRIC  AI, 


TABLE     29. 

Table  29  gives  the  correction  for  the  variation  of  gravity  with  altitude 
in  its  effect  on  the  weight  of  the  air. 

The  side  argument  is  the  same  as  in  Table  28  ;  the  top  argument  is 
the  height  of  the  lower  station  varying  by  intervals  of  200  metres  from  o  to 
2000,  with  additional  columns  for  2500,  3000  and  4000  metres. 

Example : 

Let  the  barometric  reading  (reduced  to  o°  C. )  at  the  upper  station 
be  655.7mm.;  at  the  lower  station,  772.4mm.  L,et  the  mean 
temperature  of  the  air  column  be  0  =  i2.°3  C.,  the  mean  vapor 
pressure  e  =  g  mm.  and  the  latitude  <f>  =  32!* 

Table  25,  with  argument  655.7,  gives  1179  metres. 

Table  25,     '•  "        772.4,      "  -    129 

Approximate  value  of  Z  =  1308 

Table  26,  with  Z=  1300  and  0  =  i2.°3  C,  gives  59 

Table  27,  with  e  =  gmm.  and  Z=  1370,  gives  7 

Table  28,  with  Z—  1370  and  <£  =  32°,  gives  5 

Table  29,  with  Z=  1370  and  h0  =  o,  gives  o 

Corrected  value  of  Z  =  1379  metres. 

TABLE     3O. 

TABLE  30.     Difference  of  height  corresponding  to  a  change  of  Q.I    inch   in 
the  barometer — English   measures. 

If  we  differentiate  the  barometric  formula,  page  xxvii,  we  shall  obtain, 
neglecting  insensible  quantities, 

dZ-—  —  26281  -H-  (i  +0.002039(0  —  32°))  (!+/?)• 

in  which  B  represents  the  mean  pressure  of  the  air  column  dZ. 
Putting  dB  =  0.1  inch, 


The  second  member,  taken  positively,  expresses  the  height  of  a  column 
of  air  in  feet  corresponding  to  a  tenth  of  an  inch  in  the  barometer  on  the 
parallel  of  45°  latitude.  Since  the  last  factor  (i  +  ft),  as  given  on  page  xxiii, 
is  a  function  of  the  temperature,  the  function  has  only  two  variables  and 
admits  of  convenient  tabulation. 

Table  30,  containing  values  of  d Z  for  short  intervals  of  the  arguments 
B  and  0,  has  been  taken  from  the  Report  of  the  U.  S.  Coast  Survey,  1881, 
Appendix  10,  — Barometric  hypsometry  and  reduction  of  the  barometer  to  sea 
level,  by  Wm.  Ferrel.* 

*  Due  to  the  use  of  a  slightly  different  value  for  the  coefficient  of  expansion,  Prof. 
Ferrel' s  formula,  upon  which  the  table  is  computed,  is 

dZ  =  -  *£*  (i  +  0.002034  (0  -  32°))  (i  +  0)  • 


XXX11  INTRODUCTION. 

Th~  temperature  argument  is  given  for  every  5°  from  30°  F.  to  85°  F.r 
and  the  pressure  argument  for  every  0.2  inch  from  22.0  to  30.8  inches. 

This  table  may  be  used  in  computing  small  differences  of  altitude,  and, 
up  to  a  thousand  feet  or  more,  very  approximate  results  may  be  obtained. 

Example  : 

Mean  pressure  at  Augusta,  October,  1891,  29.94  J  temperature,      6o.°8  F. 
Mean  pressure  at  Atlanta,  October,  1891,  28.97  ;  temperature,      59°  4 
Mean  pressure  of  air  column,  B  =  29.455  \  ®  —  60?  i 

Entering  the  table  with  29.455  an(i  6o.°i  as  arguments,  we  take  out  94.95 
as  the  difference  of  elevation  corresponding  to  a  tenth  of  an  inch  difference 
of  pressure.  Multiplying  this  value  by  the  number  of  tenths  of  inches 
difference  in  the  observed  pressures,  viz.  97,  we  obtain  the  difference  of 
elevation  921  feet. 

TABLE  31.     Difference   of  height  of  air  corresponding  to    a   change  of    i 
millimetre  in   the  barometer  —  Metric  measures. 

This  table  has  been  computed  by  converting  Table  18  into  metric  units. 
The  temperature  argument  is  given  for  every  2°  from  —  2°  C.  to  +  36°  C.  ;  the 
pressure  argument  is  given  for  every  millimetre  from  760  to  560  mm. 

TABLE   32.     Babine?  s  formula  for  determining  heights  by  the  barometer. 

Babinet's  formula  for  computing  differences  of  altitude*  represents  the 
formula  of  I^aplace  quite  accurately  for  differences  of  altitude  up  to  1000 
metres,  and  within  one  per  cent  for  much  greater  altitudes.  As  it  has  been 
quite  widely  disseminated  among  travellers  and  engineers,  and  is  of  con- 
venient application,  the  formula  is  here  given  in  English  and  metric  measures. 
It  might  seem  desirable  to  alter  the  figures  given  by  Babinet  so  as  to  con- 
form to  the  newer  values  of  the  barometrical  constants  now  adopted  ;  but 
this  change  would  increase  the  resulting  altitudes  by  less  than  one-half  of 
one  per  cent  without  enhancing  their  reliability  to  a  corresponding  degree, 
on  account  of  the  outstanding  uncertainty  of  the  assumed  mean  temperature 
of  the  air. 

The  formula  is,  in  English  measures, 


and  in  metric  measures, 

^(metres)  =  lfaoo  [ 

in  which  Zis  the  difference  of  elevation  between  a  lower  and  upper  station 
at  which  the  barometric  pressures  corrected  for  all  sources  of  instrumental 
error  are  B0  and  By  and  the  observed  air  temperatures  are  /0  and  t,  respectively. 

*Comptes  Rcndus,  Paris,  1850,  vol.  xxv.,  page  309. 


BAROMETRICAL    TABLES.  XXXlti 

For  ready  computation  the  formula  is  written 


and  the  factor  C,  computed  both  in  English  and  metric  measures,  has  been 
kindly  furnished  by  Prof.  Cleveland  Abbe.  The  argument  is  -J  (/0  +  1) 
given  for  every  5°  Fahrenheit  between  10°  and  100°  F.>  and  for  every  2° 
Centigrade  between  10°  and  40°  Centigrade. 

In  using  the  table,  it  should  be  borne  in  mind  that  on  account  of  the 
uncertainty  in  the  assumed  temperature,  the  last  two  figures  in  the  value  of 
C  are  uncertain,  and  are  here  given  only  for  the  sake  of  convenience  of 
interpolation.  Consequently  one  should  not  attach  to  the  resulting  altitudes 
a  greater  degree  of  confidence  than  is  warranted  by  the  accuracy  of  the 
temperatures  and  the  formula.  The  table  shows  that  the  numerical  factor 
changes  by  about  one  per  cent  of  its  value  for  every  change  of  five  degrees 
Fahrenheit  in  the  mean  temperature  of  the  stratum  of  air  between  the 
upper  and  lower  stations  ;  therefore  the  computed  difference  of  altitude  will 
have  an  uncertainty  of  one  per  cent  if  the  assumed  temperature  of  the  air 
is  in  doubt  by  5°  F.  With  these  precautions  the  observer  may  properly 
estimate  the  reliability  of  his  altitudes  whether  computed  by  Babinet's 
formula  or  by  more  elaborate  tables. 

Example  : 

lyet  the  barometric  pressure  observed  and  corrected  for  temperature  at 
the  upper  and  lower  stations  be,  respectively,  B  —  635  mm.  and 
B0  =  730  mm.  I/et  the  temperatures  be,  respectively,  /=i5°  C., 
/0  —  20°  C.  To  find  the  approximate  difference  of  height. 

With  |  (/0  +  /)  =  -  —5-  =  17^5  C,  the  table  in  metric  measures  gives 
C=I7I20  metres. 


The  approximate  difference  of  height  =  17120  x  -~-  =1191.5  metres. 

THERMOMETRICAI,  MEASUREMENT  OF  HEIGHTS   BY  OBSERVATION    OP  THE 
TEMPERATURE  OF  THE  BOIUNG  POINT  OF  WATER. 

When  water  is  heated  in  the  open  air,  the  elastic  force  of  its  vapor 
gradually  increases,  until  it  becomes  equal  to  the  incumbent  weight  of  the 
atmosphere.  Then,  the  pressure  of  the  atmosphere  being  overcome,  the 
steam  escapes  rapidly  in  large  bubbles  and  the  water  boils.  The  tem- 
perature at  which  water  boils  in  the  open  air  thus  depends  upon  the 
weight  of  the  atmospheric  column  above  it,  and  under  a  less  barometric 
pressure  the  water  will  boil  at  a  lower  temperature  than  under  a  greater 
pressure.  Now,  as  the  weight  of  the  atmosphere  decreases  with  the 
elevation,  it  is  obvious  that,  in  ascending  a  mountain,  the  higher  the 


XXXIV  INTRODUCTION. 

station  where  an  observation  is  made,  the  lower  will  be  the  temperature  of 
the  boiling  point. 

The  difference  of  elevation  between  two  places  therefore  can  be  deduced 
from  the  temperature  of  boiling  water  observed  at  each  station.  It  is 
only  necessary  to  find  the  barometric  pressures  which  correspond  to  those 
temperatures,  and,  the  atmospheric  pressures  at  both  places  being  known, 
to  compute  the  difference  of  height  by  the  tables  given  herein  for  com- 
puting heights  from  barometric  observations. 

From  the  above,  it  may  be  seen  that  the  heights  determined  by 
means  of  the  temperature  of  boiling  water  are  less  reliable  than  those 
deduced  from  barometric  observations.  Both  derive  the  difference  of  alti- 
tude from  the  difference  of  atmospheric  pressure.  But  the  temperature  of 
boiling  water  gives  only  indirectly  the  atmospheric  pressure,  which  is 
given  directly  by  the  barometer.  This  method  is  thus  liable  to  all  the 
chances  of  error  which  may  affect  the  measurements  by  means  of  the 
barometer,  besides  adding  to  them  new  ones  peculiar  to  itself,  the  prin- 
cipal of  which  is  the  difficulty  of  ascertaining  with  the  necessary  accuracy 
the  true  temperature  of  boiling  water.  In  the  present  state  of  ther- 
mometry  it  would  hardly  be  safe,  indeed,  to  rely,  in  the  most  favorable 
circumstances,  upon  quantities  so  small  as  hundredths  of  a  degree,  even 
when  the  thermometer  has  been  constructed  with  the  utmost  care ;  more- 
over, the  quality  of  the  glass  of  the  instrument,  the  form  and  substance 
of  the  vessel  containing  the  water,  the  purity  of  the  water  itself,  the  position 
at  which  the  bulb  of  the  thermometer  is  placed,  whether  in  the  current  of 
the  steam  or  in  the  water,  —  all  these  circumstances  cause  no  inconsiderable 
variations  to  take  place  in  the  indications  of  thermometers  observed  under 
the  same  atmospheric  pressure.  Owing  to  these  various  causes,  an  obser- 
vation of  the  boiling  point,  differing  by  one-tenth  of  a  degree  from  the  true 
temperature,  ought  to  be  still  admitted  as  a  good  one.  Now,  as  the  tables 
show,  an  error  of  one-tenth  of  a  degree  Centigrade  in  the  temperature  of 
boiling  water  would  cause  an  error  of  2  millimetres  in  the  barometric 
pressure,  or  of  from  70  to  80  feet  in  the  final  result,  while  with  a  good 
barometer  the  error  of  pressure  will  hardly  ever  exceed  one-tenth  of  a 
millimetre,  making  a  difference  of  3  feet  in  altitude. 

Notwithstanding  these  imperfections,  the  hypsometric  thermometer  is 
of  the  greatest  utility  to  travellers  and  explorers  in  rough  countries,  on 
account  of  its  being  more  conveniently  transported  and  much  less  liable 
to  accidents  than  the  mercurial  barometer.  A  suitable  form  for  it,  designed 
by  Regnault  (Annales  de  Chimie  et  de  Physique,  Tome  xiv,  p.  202),  consists 
of  an  accurate  thermometer  with  long  degrees,  subdivided  into  tenths. 
For  observation  the  bulb  is  placed,  about  2  or  3  centimetres  above  the 
surface  of  the  water,  in  the  steam  arising  from  distilled  water  in  a  cylin- 
drical vessel,  the  water  being  made  to  boil  by  a  spirit-lamp. 


HYGROMETRICAI,    tfABI<ES.  XXXV 

TABLES    33,    34. 

Barometric  pressures  corresponding  to  the  temperature  of  boiling  water. 

TABLE  33.  English  Measures. 

TABLE   34.  Metric  Measures. 

Table  33  is  a  conversion  into  Knglish  measures  of  Table  34.  The 
argument  is  trie  temperature  of  boiling  water  for  every  tenth  of  a  degree 
from  1 85^0  to  2i2.°9  Fahrenheit.  The  tabular  values  are  given  to  the 
nearest  o.oi  inch. 

Table  34  is  Regnault's  table  of  barometric  pressures  corresponding  to 
temperatures  of  boiling  water,  revised  by  A.  Moritz  (Acad.  Sci.  Bull.,  St. 
Petersburg,  xiii.,  1855,  col.  41-44).  To  the  degree  of  precision  here  desired, 
these  values  do  not  differ  from  the  more  recent  reduction  by  Broch.  The 
argument  is  given  for  every  tenth  of  a  degree  from  8o°o  to  ioo.°9  C.  The 
tabular  values  are  given  to  the  nearest  o.  i  mm. 


HYGROMETRICAI,    TABLES. 

PRESSURE   OP  AQUEOUS   VAPOR   IN   SATURATED   AIR. 

Tables  35,  36,  and  43,  giving  the  pressure  of  aqueous  vapor  in  saturated 
air,  are  based  upon  Dr.  Broch'  s  reduction  of  the  observations  of  Regnault 
(Travaux  et  M£moires  du  Bureau  international  des  Poids  et  Mesures,  t.  I, 
p.  A  19-39).  This  reduction  assumes  that  the  observations  may  be  repre- 
sented by  the  empirical  formula 


I  +a.t 

in  which  F  is  the  pressure  of  aqueous  vapor  .expressed  in  millimetres  of 
standard  mercury,  that  is  at  o°  C.  and  at  latitude  45°  and  sea 
level,  its  density  being  15.59593- 

t,  the  temperature  expressed  in  normal  Centigrade  degrees. 
a  =  0.003667458 

By  using  the  simultaneous  values  of  F  and  /  given  by  Regnault's 
observations,  Dr.  Broch  obtained  a  series  of  observation  equations  whose 
solution  by  the  method  of  least  squares  gave  the  following  values  for  the 

coefficients  : 

A  =       4.5686859 
b=      io-2  x  3.  134  366  174 

C  =  —  IO"5    XI.  416  1  12  423 
J=        io-7    X  1.935338308 

<?  =  —  io-9  x  2.  646  535  103 
/=     io-«x  1.139377158 

From  this  formula  Broch'  s  tables  of  vapor  pressure  were  computed. 


XXXVI  INTRODUCTION. 

TABLE  35.     Pressure  of  aqueous  vapor — English  measures. 

This  table  is  a  conversion  into  English  measures  of  Table  36.  It  gives 
the  vapor  pressure  in  saturated  air  for  temperatures  varying  by  o.°2  from 
—  2ofo  to  214^0  Fahrenheit. 

The  tabular  values  are  given  in  inches  to  four  decimals. 

A  column  of  differences  for  o?i  is  added  for  convenience  in  interpolating. 

TABLES   36,  43.     Pressure  of  aqueous  vapor. — Metric  measures. 

These  tables,  taken  from  Broch,  give  the  pressure  of  aqueous  vapor  to 
hundredths  of  a  millimetre  for  temperatures  varying  by  o.°i  C.  from  —  29.°o 
to  ioo.°9  Centigrade.  The  values  for  temperatures  between  o°  C.  and  45°  C. 
are  given  in  Table  43,  the  remainder  in  Table  36. 

TABLE   37.     Pressure  of  aqueous  vapor  at  low  temperature. — (C.  F.  Marvin.} 

Broch' s  vapor  pressures  at  temperatures  below  o°  C.  (32°  F.}  as  given  in 
Tables  35  and  36,  when  compared  with  the  actual  observed  values  of  Reg- 
nault  are  found  to  be  systematically  too  large.  This  discrepancy  signifies 
that  the  empirical  formula  adopted  by  Broch  fails  to  represent  accurately 
the  law  of  variation  of  vapor  pressure  for  temperatures  both  above  and 
below  the  freezing  point.  Moreover,  the  failure  in  the  application  of  the 
formula  might  be  inferred  from  the  laws  of  diffusion  following  from  the 
kinetic  theory  of  gases,  for  these  give  no  reason  to  suppose  that  the  function 
expressing  the  relation  between  vapor  pressure  and  temperature  is  continuous 
between  the  two  states  of  water  and  ice. 

Under  proper  conditions  water  can  be  cooled  far  below  o°  C.  (32°  F.) 
before  solidifying,  so  that  at  the  same  temperature  we  may  have  it  either 
in  the  liquid  or  the  solid  state,  and  experiments  confirm  the  theory  of 
diffusion  in  showing  that  the  pressure  of  the  vapor  is  different  according  as 
it  is  in  contact  with  its  liquid  or  its  solid  at  the  same  temperature.  The 
method  hitherto  employed  of  combining  vapor  pressures  above  and  below 
freezing,  and  attempting  to  represent  them  by  a  single  continuous  function, 
must  therefore  be  considered  as  radically  erroneous. 

Recognizing  the  systematic  errors  of  the  vapor  pressures  given  by 
Broch' s  formula  for  temperature  below  freezing,  the  Chief  Signal  Officer 
lately  authorized  a  new  determination  by  direct  observation.  This  experi- 
mental investigation  has  been  carried  out  by  Prof.  C.  F.  Marvin,  from  the 
results  of  which  (Annual  Report  Chief  Signal  Officer,  1891;  Appendix  No. 
10,)  Table  37  is  reproduced.  The  interpolation  between  the  observed  press- 
ures which  were  noted  at  intervals  of  about  5°  F.t  was  effected  graphically 
and  not  by  mathematical  formula. 

The  vapor  pressures  were  determined  for  the  case  of  the  vapor  in  con- 
tact with  ice  and  not  a  water  surface.  For  the  temperature  of  melting  ice 
(o°  C.  or  32°^.)  all  values  agree.  Below  this  temperature  Marvin's  vapor 
pressures  are  slightly  smaller  than  Regnault's,  but  differ  from  the  latter  less 
than  any  other  tabular  values. 


HYGROMETRICAI,    TABLES.  XXXvii 

The  argument  of  the  table  is  given  for  every  two-tenths  of  a  degree 
Fahrenheit  from  —  6o.°o  to  32.°o  Fahrenheit.  The  tabular  values  are  given 
in  millimetres  and  inches  to  three  and  four  decimals  respectively. 

TABLES     38,    39. 

TABLE  38.     Weight  of  aqueous  vapor  in   a  cubic  foot  of  saturated  air  — 
English   measures. 

TABLE  39.     Weight  of  aqueous  vapor  in  a  cubic  metre  of  saturated  air  — 
Metric  measures. 

The  weight  of  aqueous  vapor  in  a  cubic  metre  of  saturated  air  is  given 
by  the  expression 

iv    aS     F 

W  =  -  -   .   —  T—  . 

I  -f-  a  t      760 

a  is  the  weight  of  a  cubic  metre  of  dry  air  (free  from  carbonic  acid) 
at  temperature  o°  C.,  and  pressure  of  760  millimetres  of  standard 
mercury  at  45°  latitude  and  sea-level:  a  =  1.29278  kg.  (Bureau 
International  des  Poids  et  Mesures  :  Travaux  et  Memoires,  t.  I,  p. 

A  540  _ 

8  is  the  density  of  aqueous  vapor  :  8  =  0.6221 
F  is  the  pressure  of  aqueous  vapor  in  saturated  air  whose  temperature 

is  t  ;  Broch's  values  are  adopted,  expressed  in  millimetres. 
a  is  the  coefficient  of  expansion  of  air  for  i°  C.  :  a  =  0.003667 
/  is  the  temperature  in  Centigrade  degrees. 
Whence  we  have 

F 

W  (grammes)  =  1.05821  x  -  TZ~*  ' 

i  +0.003667* 

Table  39  is  computed  from  this  formula  and  gives  the  weight  of  vapoi 
in  grammes  in  a  cubic  metre  of  saturated  air  for  dew-points  from  —  29°  to 
40°  C,  the  intervals  from  6°  to  40°  C  being  ofi  C.  The  tabular  values  are 
given  to  three  decimals. 

The  weight  W'  of  aqueous  vapor  in  a  cubic  foot  of  saturated  air  is 
obtained  by  converting  the  foregoing  constants  into  English  measures. 

The  weight  of  a  cubic  foot  of  dry  air  at  temperature  32°  F.  and  at  a 
pressure  of  760  mm.  or  29.921  inches  is 


,  ,  .  . 

.'  (grams)  =---  =  564.94. 

We  have  therefore, 

w  (grains)  = 


I  +  0.002037  (f  —  32°) 

The  temperature    t'  is  expressed   in    degrees   Fahrenheit;   the  vapot 
pressure  F ,  expressed  in  inches,  is  obtained  from  Table  35. 


XXXV111  INTRODUCTION. 

Table  38*  gives  the  weight  of  aqueous  vapor  in  grains  in  a  cubic  foot  of 
saturated  air  for  dew-points  given  to  every  o.°5  from  —  19^5  to  115°  F.>  the 
values  being  computed  to  the  thousandth  of  a  grain. 

The  computation  of  Tables  38  and  39  has  been  furnished  by  Prof.  Wm. 
L,ibbey,  jr. 

REDUCTION    OF    OBSERVATIONS    WITH    THE    PSYCHROMETER    AND 
DETERMINATION  OF  RELATIVE   HUMIDITY. 

The  psychrometric  formula  derived  by  Maxwell,  Stefan,  August, 
Regnault  and  others  is,  in  its  simplest  form, 

f=ft-A  B  (/-./,), 
in  which  /  =  Air  temperature. 

^  =  Temperature  of  the  wet-bulb  thermometer. 
f=  Pressure  of  aqueous  vapor  in  the  air. 

yj  =  Pressure  of  aqueous  vapor  in  saturated  air  at  temperature  tr 
B  =  Barometric  pressure. 

A  =  A  quantity  which,  for  the  same  instrument  and  for  certain 
conditions,  is  a  constant,  or  a  function  depending  in  a 
small  measure  on  ^ . 

The  important  advance  made  since  the  time  of  Regnault  consists  in 
recognizing  that  the  value  of  A  differs  materially  according  to  whether  the 
wet-bulb  is  in  quiet  or  moving  air.  This  was  experimentally  demonstrated 
by  the  distinguished  Italian  physicist,  Belli,  in  1830,  and  was  well  known 
to  Espy,  who  always  used  a  whirled  psychrometer.  The  latter  describes 
his  practice  as  follows :  ' '  When  experimenting  to  ascertain  the  dew-point 
by  means  of  the  wet-bulb,  I  always  swung  both  thermometers  moderately 
in  the  air,  having  first  ascertained  that  a  moderate  movement  produced 
the  same  depression  as  a  rapid  one." 

The  principles  and  methods  of  these  two  pioneers  in  accurate  psychrom- 
etry  have  now  come  to  be  adopted  in  the  standard  practice  of  meteor- 
ologists, and  psychrometric  tables  are  adapted  to  the  use  of  a  whirled  or 
ventilated  instrument. 

The  factor  A  depends  in  theory  upon  the  size  and  shape  of  the  ther- 
mometer bulb,  largeness  of  stem  and  velocity  of  ventilation,  and  different 
formulae  and  tables  would  accordingly  be  required  for  different  instruments. 
But  by  using  a  ventilating  velocity  of  three  metres  or  more  per  second,  the 
differences  in  the  results  given  by  different  instruments  vanish,  and  the  same 
tables  can  be  adapted  to  any  kind  of  a  thermometer  and  to  all  changes  of 
velocity  above  that  which  gives  sensibly  the  greatest  depression  of  the  wet- 
bulb  temperature;  and  with  this  arrangement  there  is  no  necessity  to 
measure  or  estimate  the  velocity  in  each  case  further  than  to  be  certain  that 
it  does  not  fall  below  the  assigned  limit. 

*The  table  has  been  computed  with  the  factor  11.7449,  which  results  from  Clarke's 
value  for  the  conversion  of  the  metre,  instead  of  with  the  value  11.7459  above  derived. 


HYGROMETRICAI,    TABLES.  XXXIX 

The  formula  and  tables  here  given  for  obtaining  the  vapor  pressure  and 
dew-point  from  observations  of  the  whirled  or  ventilated  psychrometer  are 
those  deduced  by  Prof.  Wm.  Ferrel  {Annual  Report  Chief  Signal  Officer, 
1886,  Appendix  24)  from  a  discussion  of  a  large  number  of  observations. 

Taking  the  psychrometric  formula  in  metric  units,  pressures  being 
expressed  in  millimetres  and  temperatures  in  Centigrade  degrees,  Prof. 
Ferrel  derived  for  A  the  value 

A  —  0.000656  (i  +  0.0019  ^) 

In  this  expression  for  A,  the  factor  depending  on  /,  arises  from  a  similar 
term  in  the  expression  for  the  latent  heat  of  water,  and  the  theoretical  value 
of  the  coefficient  of  /,  is  0.00115.  Since  it  would  require  a  very  small 
change  in  the  method  of  observing  to  cause  the  difference  between  the 
theoretical  value  and  that  obtained  from  the  experiments,  Prof.  Ferrel 
adopted  the  theoretical  coefficient  0.00115  an(i  then  recomputed  the  obser- 
vations, obtaining  therefrom  the  final  value 

A  =  0.000660  (i  +  o.ooi  is/,). 

With  this  value  the  psychrometric  formula  in  metric  measures  becomes 
/==/,—  o.ooo 660  B  (/  —  /,)  (i  +0.00115/0 

In  order  to  adapt  the  formula  to  convenient  tabulation,  Prof.  Ferrel 
substituted  t  —  /,  for  /,  in  the  last  factor,  a  modification  which  produces 
appreciable  error  only  in  extreme  cases.  The  error  in  the  computed  vapor 
pressure  will  be 

£"  =  0.00000076  #(/-/,)  (*— 2*,)- 

Expressed  in  English  measures,  the  formula  is 

/=/i—  0.000367  #  (/— O  [i  +0.00064  Ci— 32°)] 

and  with  the  same  modification  in  order  to  render  the  formula  more  con- 
venient for  tabulation,  we  have 

/=/  -0.000367  #(/-/,)  (i  +  0.00064  (*-/,)), 

»n  which  f=  Vapor  pressure  in  inches. 

/,  =  Vapor  pressure  in  saturated  air  at  temperature  /, . 
/  —  Temperature  of  the  air  in  Fahrenheit  degrees. 
t,  =•  Temperature  of  the  wet-bulb  thermometer  in  Fahrenheit  degrees. 
B  —  Barometric  pressure  in  inches. 

TABLES  40,  41. 

Reduction  of  Psychrometric  Observations — English  measures. 
TABLE  4O.     Pressure  of  aqueous  vapor. 
TABLE  41.      Values  of  0.000367  B(t—t^(i  +  -   ~—^\ 

These  two  tables  provide  for  computing  the  vapor  pressure  and  dew- 
point  from  observations  of  ventilated  wet-  and  dry-bulb  Fahrenheit  ther- 
mometers. 


xl  INTRODUCTION. 

Table  40,  with  the  wet-bulb  temperature  ^  as  an  argument,  gives  the 
value  of  /  ,  the  first  term  of  the  formula  for  the  vapor  pressure  ft  given 
above.  It  is  simply  an  abbreviation  of  Table  35  for  temperatures  above 
32°  F.,  and  of  Table  37  for  temperatures  below  32°  F.,  reprinted  for 
convenience. 

Table  41,  with  t—t^  and  B  as  arguments,  gives  the  value  of  the  second 
term  of  the  formula,  viz  : 

0.000  367  B  (t- 


The  top  argument  is  given  for  every  half  inch  from  30.5  to  18.5  inches; 
the  side  argument,  t  —  /,,  is  given  for  every  whole  degree  up  to  40°  F. 
Tabular  values  are  given  to  thousandths  of  inches. 

With  the  two  tables  we  then  have, 

f  (vapor  pressure)  =  Table  40  —  Table  41  . 

The  value  of  t  in  Table  40,  corresponding  to  the  vapor  pressure  thus 
obtained,  is  the  dew-point. 
Examples  : 

1.  Given  /  =  84^3;  ^  =  66.°7,  and  B  =  30.00  inches,  to  find  the  vapor 

pressure  and  dew-point. 

Table  40,  with  /,  =  66°y,  gives  /  =  0.654  inches. 
Table  41,  with   t—t^—  84^3  —  66.0y  =  17^6   and  B  =  30.00  inches 

as  arguments,   gives   0.196  inch   as   the  value   of    the  last   term 

of   the  expression  above.     Hence  we  have  the   vapor  pressure 
/=  0.654  —  0.196  =  0.458  inch.      The    temperature    (Table    40) 

corresponding  to  this  value  of/  is  the  dew-point,  d  =  56^6  F. 

2.  Given  /  =  34.°5;    /t  —  29^4,  and  #^-22.3  inches,  to  find  the  vapor 

pressure  and  dew-point. 

Table  40,  with  /,  =  29^4,  gives/  =  0.162  inch. 

Table  41,  with  /  —  /,  =  34^5  —  29.°4  =  5.°!  and  £=22.5  inches  (the 
nearest  value  in  the  table  to  22.3  inches)  as  arguments,  gives  0.042 
inch  as  the  value  of  the  second  term  of  the  expression  for/.  Hence 
we  have  the  vat>or  pressure/  =  o.  162  —  0.042  =  o.  120  inch. 

The  temperature  M  Table  40,  corresponding  to  this  value  of/  is  the 
dew-point,  d=22°o. 


using  Tabte  40,  the  proportional  part  for  tenths  of  the  argument,  t—t^ 
may  be  easily  obtained  by  taking  one-tenth  of  the  tabular  value  belonging  to  the  same 
number  of  degrees  ;  for  instance,  in  the  first  example,  the  tabular  value  for  17°  is  0.189, 
and  the  proportional  part  for  o?6  is  one-tenth  the  tabular  value  for  6?o,  viz.,  one-tenth 
of  .066,  or  .007.  Hence  we  get  o.  189  -f-  0.007  =  o.  196. 

TABLE  42.     Relative  humidity  —  Temperature  Fahrenheit. 

Table  42  gives  the  relative  humidity  of  the  air  in  hundredths,  having 
given  the  air  temperature  t  and  the  dew-point  d  in  Fahrenheit  degrees. 


HYGROMKTRICAIy    TABLES.  xll 

It  is  computed  by  the  formula 

Relative  humidity  =  ^~. 

f  and  F  are  the  maximum  pressures  of  vapor  corresponding  respectively  to 
the  temperatures  d  and  t  as  given  in  Table  35  for  temperatures  above  32°  F. 
and  in  Table  37  for  temperatures  below  32°  F. 

The  top  argument  is  t  —  d,  extending  by  half  degree  intervals  from  o°  to 
15°  F.,  and  by  increasing  intervals  from  15°  to  75° F. 

The  side  argument  is  the  air  temperature  t,  given  for  intervals  of  four 
degrees  from  —32°  to  120°  F. 

Example : 

Let  the  air  temperature  be  62°^.  and  the  dew-point  51° F.,  to  find  the 
relative  humidity. 

With  /  —  d=  1 1°  for  the  top  argument,  and  t  =  62°  for  the  side  argument, 
the  table  gives  67.5  per  cent  as  the  relative  humidity. 

TABLES     43,     44. 

Reduction  of  Psychrometric  Observations — Metric  measures. 
TABLE  43.     Pressure  of  aqueous  vapor. 

TABLE  44.      Values  of  0.000660  B  (/  —  /,)  (  i  +  -  — ~)  - 

\         873  / 

These  two  tables  provide  for  computing  the  vapor  pressure  and  dew- 
point  from  observations  of  ventilated  wet  and  dry-bulb  thermometers 
Centigrade. 

Table  43,  with  the  wet-bulb  temperature  /,  as  an  argument,  gives  the 
value  of/,,  the  first  term  of  the  formula  for  the  vapor  pressure/  viz  : 

/=/,—  0.000660  B  (*  —  /,)  [i  +0.00115  (*  —  *,)]• 

It  gives  the  vapor  pressure  to  hundredths  of  a  millimetre  from  —  30^0  C. 
to  45. °9  C.t  the  intervals  being  i°  for  temperatures  below  o°  C.  and  ofi  for 
temperatures  above  o°  C. 

Table  44,  with  the  depression  of  the  wet-bulb  t  —  t^  and  the  barometric 
pressure  B  as  arguments,  gives  the  value  of  the  second  term  of  the  formula. 

The  top  argument  is  given  for  every  10  millimetres  from  770  to  460  mm.; 
the  side  argument  t  —  t^  is  given  for  every  whole  degree  up  to  20.  Tabular 
values  are  given  to  hundredths  of  a  millimetre. 

From  the  two  parts  of  the  table  we  then  have 

Vapor  pressure,  /  (mm)  —  Table  43  —  Table  44. 

The  temperature  in  Table  43,  corresponding  to  the  vapor  pressure  thus 
obtained,  is  the  dew-point. 


xlii  INTRODUCTION. 

Example : 

Given  t  =  io°4  C. ;  /,  =  8.°3  C.  and  B  =  740  mm. ,  to  find  the  vapor  pressure 
and  dew-point. 

Table  43,  with  the  argument  /t  =  8^3  C,  gives/,  =  8. 15  mm. 

Table  44,  with  t  —  ^  =  2.°i  and  B  =  740  as  arguments,  gives  1.03  mm.  as 
the  value  of  the  last  term  of  the  expression  for/.  Hence  we  have  the  vapor 
pressure,  /=  8. 1 5  —  i. 03  =  7. 12  mm.  The  value  of  the  temperature  in  Table 
40,  corresponding  to  this  vapor  pressure,  is  the  dew-point  d  =  6.°3  C. 

TABLE  45.     Relative  humidity  —  Temperature  Centigrade. 

Table  45  gives  the  relative  humidity  of  the  air  in  hundredths,  having 
given  the  air  temperature  t  and  the  dew-point  d  in  Centigrade  degrees. 
It  is  computed  by  the  formula 

Relative  humidity  =  ~, 
r 

f  and  F  being  the  maximum  pressures  of  aqueous  vapor  corresponding  to 
the  temperatures  d  and  t  as  given  in  Tables  36  and  43. 

The  top  argument  is  the  dew-point  d,  extending  by  5°  intervals  from 
-  15°  to  30°  C. 

The  side  argument  is  the  depression  of  the  dew-point  t  —  d,  given  for 
every  o.°2  C.  from  o.°o  to  lofo ;  for  every  o°5  from  io°o  to  20^0,  and  for  every 
i°  from  2o°o  to  30 fo. 

Example : 

Given  the  air  temperature  21°  C.  and  the  dew-point  17°  C,,  to  determine 
the  relative  humidity. 

With  t  —  d  =  4°  C.  for  the  side  argument,  and  d  =  17°  C.  for  the  top 
argument,  the  table  gives  78  per  cent  as  the  relative  humidity. 


TABLE  46.  REDUCTION  OF  SNOWFAU,  MEASUREMENT. 

The  determination  of  the  water  equivalent  of  snowfall  has  usually  been 
made  by  one  of  two  methods :  (a)  by  dividing  the  depth  of  snow  by  an 
arbitrary  factor  ranging  from  8  to  16  for  snow  of  different  degrees  of  com- 
pactness ;  (£)  by  melting  the  snow  and  measuring  the  depth  of  the 
resulting  water.  The  first  of  these  methods  has  always  been  recognized  as 
incapable  of  giving  reliable  results,  and  the  second,  although  much  more 
accurate,  is  still  open  to  objection.  After  extended  experience  in  the 
trial  of  both  these  methods,  it  has  been  found  that  the  most  accurate  and 
most  convenient  measurement  is  that  of  weighing  the  collected  snow, 
and  then  converting  the  weight  into  depth  in  inches.  The  method  is 
equally  applicable  whether  the  snow  as  it  falls  is  caught  in  the  gage,  or  a 
section  of  the  fallen  snow  is  taken  by  collecting  it  in  an  inverted  gage. 


WIND    TABLES,  xliii 

TABLE    46. 

TABLE  46.     Depth  of  water  corresponding  to  the  weight  of  snow  (or  rain) 
collected  in  an  8-inch  gage. 

The  table  gives  the  depth  to  hundredths  of  an  inch,  corresponding  to 
the  weight  of  snow  or  rain  collected  in  a  gage  having  a  circular  collecting 
mouth  8  inches  in  diameter  —  this  being  the  standard  size  of  gage  used 
throughout  the  United  States. 

The  argument  is   given   in  avoirdupois  pounds,  ounces  and   quarter 
ounces  in  order  that  it  shall  be  adapted  to  the  customary  graduation  of 
commercial  scales. 
Example : 

The  weight  of  snow  collected  in  an  8-inch  gage  is  2  Ibs.  2^  oz.     To 
find  the  corresponding  depth  of  water. 

The  table  gives  directly  1.18  inches. 

TABLE     47. 

TABLE  47.     Rate  of  decrease  of  vapor  pressure  with  altitude. 

From  hygrometric  observations  made  at  various  mountain  stations  on 
the  Himalayas,  Mount  Ararat,  TenerifFe,  the  Alps,  and  also  in  balloon 
ascensions,  Dr.  J.  Tfaxm(Zeitschrift  fur  Meteor ologie,  vol.  ix,  1874,  p.  193-200) 
Has  deduced  the  following  empirical  formula  showing  the  average  relation 
between  the  vapor  pressure  fQ  at  a  lower  station  and/  the  vapor  pressure  at 
an  altitude  h  metres  above  it : 

/  ^= 

-y-  =  10  6517  • 

J  o 

This  is  of  course  an  average  relation  for  all  times  and  places  from  which 
the  actual  rate  of  decrease  of  vapor  pressure  in  any  individual  case  may 
widely  differ. 

Table  47  gives  the  values  of  the  ratio  •—-  for  values  of  h  from  200  to 

/o 

6000  metres.     An  additional  column  gives  the  equivalent  values  of  h  in  feet. 


WIND    TABLES. 

CALCULATION    OF    THE    MEAN   DIRECTION    OF    THE    WIND    BY    LAMBERT'S 

FORMULA. 

Lambert's  formula  for  the  eight  principal  points  of  the  compass  is 

_E 

'- 


a  is  the  angle  of  the  resultant  wind  direction  with  the  meridian. 

E,  NE,  N,  etc.,  represent  the  wind  movement  from  the  corresponding 
directions  East,  Northeast,  North,  etc.  In  practice  instead  of  taking  the  total 
wind  movement,  it  is  often  considered  sufficient  to  take  as  proportional 


INTRODUCTION. 

thereto  the  number  of  times  the  wind  has  blown  from  each  direction,  which 
is  equivalent  to  considering  the  wind  to  have  the  same  mean  velocity  for  all 
directions. 

If  directions  are  observed  to  sixteen  points,  half  the  number  belonging 
to  each  extra  point,  should  be  added  to  the  two  octant  points  between 
which  it  lies  ;  for  example,  NNE  =  6  should  be  separated  into  N=  3  and 
NE  =•  3  ;  ESE  =  4  into  E  =  2  and  SE = 2 .  The  result  will  be  approximately 
identical  with  that  obtained  by  using  the  complete  formula  for  sixteen  points. 

TABLE  48.     Multiples  of  cos  45° ;  form  for  computing   the  numerator  and 
denominator. 

TABLE  49.     Values  of  the  mean  direction  (a)  or  its  complement  (90°  —  a). 

Table  48  gives  products  of  cos  45°  by  numbers  up  to  209,  together  with 
a  form  for  the  computation  of  the  numerator  and  denominator,  illustrated 
by  an  example.  The  quadrant  in  which  a  lies  is  determined  by  the  follow- 
ing rule  : 

When  the  numerator  and  denominator  are  positive,  a  lies  between 
AT  and  E. 

When  the  numerator  is  positive  and  the  denominator  negative,  a  lies 
between  5*  and  E. 

When  the  numerator  and  denominator  are  negative,  a  lies  between 
S  and  W. 

When  the  numerator  is  negative  and  the  denominator  positive,  a  lies 
between  N  and  W. 

Table  49  *  combines  the  use  of  a  division  table  and  a  table  of  natural 
tangents.  It  enables  the  computer,  with  the  numerator  and  denominator  of 
Lambert's  formula  (computed  from  Table  48)  as  arguments,  to  take  out 
directly  the  mean  wind  direction  a  or  its  complement. 

The  top  argument  consists  of  every  fifth  number  from  10  to  200. 

The  side  argument  is  given  for  every  unit  from  i  to  50  and  for  every  two 
units  from  50  to  150.  Tabular  values  are  given  to  the  nearest  whole  degree. 

Rule  for  using  the  table  : 

Enter  the  table  with  the  larger  number  (either  numerator  or  denomi- 
nator) as  the  top  argument. 

If  the  denominator  be  larger  than  the  numerator,  the  table  gives  a. 

If  the  denominator  be  smaller  than  the  numerator,  the  table  gives 
90°  —  a. 

a  is  measured  from  the  meridian  in  the  quadrant  determined  by  the  rule 
given  with  Table  48. 

*From  Hand-book  of  Meteorological  Tables.  By  H.  A.  Hazen.  Washington,  1888. 
A  corrected  copy  of  the  table  has  been  kindly  furnished  for  the  present  volume  by 
the  author. 


WIND    TABLES. 

Example:  —  4-2 

tana  =  —  ^- 
-27 

Table  49  gives  90°  —a  =  32° 


NOTE.  —  If  the  numerator  and  denominator  both  exceed  150  or  if  either  exceeds 
200,  the  fraction  must  be  divided  by  some  number  which  will  bring  them  within  the 
limits  of  the  table.  The  larger  the  values,  provided  they  are  within  these  limits,  the 

easier  and  more  accurate  will  be  the  computation.     For  example,  let  tan  a  =  - 

J4 

The  top  argument  is  not  given  for  18,  but  if  we  multiply  by  5  or  10  and  obtain  —  —  or 

—  ,  the  table  gives,  without  interpolation,  90°  —  0  =  38°  and  01  =  ^52°  W. 
140 

CONVERSION  OF  VELOCITIES. 

TABLE     SO. 

TABLE  5O.  Synoptic  conversion  of  velocities. 

This  table*,  contained  on  a  single  page,  converts  miles  per  hour  into 
metres  per  second,  feet  per  second  and  kilometres  per  hour.  The  argu- 
ment, miles  per  hour,  is  given  for  every  half  unit  from  o  to  78.  Tabular 
values  are  given  to  one  decimal.  For  the  rapid  interconversion  of  velocities, 
when  extreme  precision  is  not  required,  this  table  has  proved  of  marked 
convenience  and  utility. 

.    TABLE     61. 

TABLE   51.     Conversion  of  miles  per  hour  into  feet  per  second. 

The  argument  is  given  for  every  unit  up  to  149  and  the  tabular  values 
are  given  to  one  decimal. 

TABLE     52. 

TABLE   52.     Conversion  of  feet  per  second  into  miles  per  hour. 

The  argument  is  given  for  every  unit  up  to  199  and  the  tabular  values 
are  given  to  one  decimal. 

TABLE     53. 

TABLE   53.     Conversion  of  metres  per  second  into  miles  per  hour. 

The  argument  is  given  for  every  tenth  of  a  metre  per  second  up  to 
60  metres  per  second,  and  the  tabular  values  are  given  to  one  decimal. 

TABLE     64. 

TABLE   54.     Conversion  of  miles  per  hour  into  metres  per  second. 

The  argument  is  given  for  every  unit  up  to  149,  and  the  tabular  values 
are  given  to  two  decimals. 

*  From  Hand-book  of  Meteorological  Tables.  By  H.  A.  Hazen.  Washington,  1888. 
With  permission  of  the  author. 


xlvi  INTRODUCTION. 

TABLE   55.     Conversion  of  metres  per  second  into  kilometres  per  hour. 

The  argument  is  given  for  every  tenth  of  a  metre  per  second  up  to  60 
metres  per  second,  and  the  tabular  values  are  given  to  one  decimal. 

TABLE   56.     Conversion  of  kilometres  per  hour  into  metres  per  second. 

The  argument  is  given  for  every  unit  up  to  200,  and  the  tabular  values 
are  given  to  two  decimals. 

TABLE   57.     Beaufort  wind  scale  and  its  conversion  into  velocity. 

The  personal  observation  of  the  estimated  force  of  the  wind  on  an 
arbitrary  scale  is  a  method  that  belongs  to  the  simplest  meteorological 
records  and  is  widely  practiced.  Although  anemometers  are  used  at  meteor- 
ological observatories,  the  majority  of  observers  are  still  dependent  upon 
estimates  based  largely  upon  their  own  judgment,  and  so  reliable  can  such 
estimates  be  made  that  for  many  purposes  they  abundantly  answer  the 
needs  of  meteorology  as  well  as  of  climatology. 

A  great  variety  of  such  arbitrary  scales  have  been  adopted  by  different 
observers,  but  the  one  that  has  come  into  the  most  general  use  and  received 
the  greatest  definiteness  of  application  is  the  duodecimal  scale  introduced 
into  the  British  navy  by  Admiral  Beaufort  about  1800. 

The  definitions  of  the  successive  grades  of  the  Beaufort  scale  were 
made  in  terms  of  the  effect  of  the  wind  on  the  sails  of  a  full-rigged  ship,  so 
that  navigators  of  all  nations  have  generally  acquired  a  very  uniform  and 
definite  idea  of  their  meaning  and  a  very  considerable  expertness  in  the  use 
of  the  scale.  The  Table  gives  the  designations  of  the  1 2  grades  together 
with  several  conversions  of  the  scale  into  wind  velocities  as  made  by 
different  meteorologists.  A  committee  appointed  by  the  Royal  Meteoro- 
logical Society  to  establish  a  conversion  of  the  Beaufort  scale  into  wind 
velocity  made  a  preliminary  report  (Quart.  Journal  Roy.  Meteorological  Soc. , 
vol.  13,  1887),  but  did  not  consider  their  work  sufficiently  complete  to  present 
a  definite  conversion  table,  f 


GEODETICAI,  TABLES. 

TABLE  58.     Relative  acceleration  of  gravity  at  sea-level  at  different  latitudes. 

The  formula  adopted  for  the  variation  of  gravity  with  latitude  is  that  of 
Prof.  Harkness* 

£>  =<£«  (i  —0.002662  cos  2<£) 

in  which  g$  is  the  acceleration  of  the  gravity  at  latitude  <j>,  and  g^  the 
acceleration  at  latitude  45.° 

The  table  gives  the  values  of  the  ratio  •»*•  to  six  decimals  for  every  10' 
of  latitude  from  the  equator  to  the  pole. 

*  WM.  HARKNESS  :  The  solar  parallax  and  its  related  constants.    Washington,  1891. 

t  Modern  steamships  move  with  velocities  sufficient  to  affect  all  wind  observations 
aboard  of  them. 


GEODETICAL    TABLES,  xlvii 

LENGTH   OF  A  DEGREE   OF  THE  MERIDIAN  AND   OF  ANY   PARAI^EL. 

The  dimensions  of  the  earth  used  in  computing  lengths  of  the  meridian 
and  of  parallels  of  latitude  are  those  of  Clarke's  spheroid  of  1866.*  This 
spheroid  undoubtedly  represents  very  closely  the  true  size  and  shape  of  the 
earth,  and  is  the  one  to  which  nearly  all  geodetic  work  in  the  United  States 
is  now  referred. 

The  values  of  the  constants  are  as  follows  : 

a,  semi-major  axis  =  20926062  feet ;    log  a  =  7.3206875. 

b,  semi-minor  axis  —  20855121  feet ;   log  £  =  7.3192127. 

#2   ^2 

e2-  =  —        —  =  0.00676866;  log  e2  =  7.8305030—  10. 

a2 

With  these  values  for  the  figure  of  the  earth,  the  formula  for  computing 
any  portion  of  a  quadrant  of  the  meridian  is 

Meridional  distance  in  feet=  [5.5618284]  A  <t>  (in  degrees), 

—  [5.0269880]  cos  2<j>  sin  A  <j>, 
+  [2.0528]  cos  4$  sin  2  A  <£, 

in  which  2<£  =  <£2  -f  <£, ,  A<£  =  <£2  ~~  &  >  fa »  fa  =  en(i  latitudes  of  arc. 

For  the  length  of  i  degree,  the  formula  becomes : 
i  degree  of  the  meridian,  in  feet  =  364609.9  —  1857.1  cos  2<j>  +  3.94  cos  4$. 

The  length  of  the  parallel  is  given  by  the  equation 

i  degree  of  the  parallel  at  latitude  <j>,  in  feet  = 

365538.48  cos  <£  —  310.17  cos  3^  +  0.39  cos  5^. 

TABLE     59. 

TABLE  59.     Length  of  one  degree  of  the  meridian  at  different  latitudes. 

This  gives  for  every  degree  of  latitude  the  length  of  one  degree  of  the 
meridian  in  statute  miles  to  three  decimals,  in  metres  to  one  decimal,  and 
in  geographic  miles  to  three  decimals — the  geographic  mile  being  here 
defined  to  be  one  minute  of  arc  on  the  equator.  The  values  in  metres  are 
computed  from  the  relation  :  i  metre  =  39.3700  inches.  The  tabular  values 
represent  the  length  of  an  arc  of  one  degree,  the  middle  of  which  is 
situated  at  the  corresponding  latitude.  For  example,  the  length  of  an  arc 
of  one  degree  of  the  meridian,  whose  end  latitudes  are  29°  30'  and  30°  30^  is 
68.879  statute  miles. 

TABLE     60. 

TABLE   60.     Length  of  one  degree  of  the  parallel  at  different  latitudes. 
This  table  is  similar  to  Table  59. 

*  Comparisons  of  standards  of  length,  made  at  the  Ordnance  Survey  office,  South- 
ampton, England,  by  Capt.  A.  R.  Clarke,  R.  E.,  1866. 


xlviii 


INTRODUCTION. 


TABLE   61.     Duration  of  sunshine  at  different  latitudes  for  different  values 
of  the  sun's  declination. 

Let  Z  be  the  zenith,  and  NH  the  hori- 

zon of   a   place   in   the   northern 

hemisphere. 
P  the  pole; 

QEQ'  the  celestial  equator; 
RR  the  parallel  described  by  the  sun  on 

any  given  day; 
•S1  the  position  of  the  sun  when  its  upper 

limit  appears  on  the  horizon; 
/Wthe  latitude  of  the  place,  <j>. 
STihe  sun's  declination,  8. 
PS  the  sun's  polar  distance,  90°  —  8. 
ZSthe  sun's  zenith  distance,  z. 
ZPS  the  hour  angle  of  the  sun  from  meridian,  /. 

r  the  mean  horizontal  refraction  =  34'  approximately. 
5  the  mean  solar  semi-diameter  =  1  6'  " 

z  =  90°  +  r  -f  5  =  90°  50' 

In  the  spherical  triangle  ZPS,  the  hour  angle  ZPS  may  be  computed 
from  the  values  of  the  three  known  side  by  the  formula 

sin*  ZPS1  =    fsin  j  (ZS  +  PZ-PS)  sin  j-  (ZS  +  PS-PZ) 
N  sin  PZ  sin  PS 


or 


cos  <   cos  8 


The  hour  angle  /,  converted  into  mean  solar  time  and  multipliecl  by  2, 
is  the  duration  of  sunshine. 

Table  61  has  been  computed  for  this  volume  by  Prof.  Wm.  Libbey,  jr. 
It  is  a  table  of  double  entry  with  arguments  8  and  <£.  For  north  latitudes 
northerly  declination  is  considered  positive  and  southerly  declination  as 
negative.  The  table  may  be  used  for  south  latitudes  by  considering 
southerly  declination  as  positive  and  northerly  declination  as  negative. 

The  top  argument  is  the  latitude,  given  for  every  5°  from  o°  to  40°,  for 
every  2°  from  40°  to  60°,  and  for  every  degree  from  60°  to  8o.° 

The  side  argument  is  the  sun's  declination  for  every  20'  from  5  23°  27' 
to  ^23°  27'. 

The  duration  of  sunshine  is  given  in  hours  and  minutes. 

To  find  the  duration  of  sunshine  for  a  given  day  at  a  place  whose 
latitude  is  known,  find  the  declination  of  the  sun  at  mean  noon  for  that  day 
in  the  Nautical  Almanac,  and  enter  the  table  with  the  latitude  and  declination 
as  arguments. 


CONVERSION    OF    LINEAR    MEASURES,  xlix 

Example : 

To  find  the  duration  of  sunshine,  May  18,  1892,  in  latitude  49°  30'  North, 
From  the  Nautical  Almanac,  8  =  19°  43'  N. 

From  the  table,  with  8  =  19°  43'  N  and  <£  =  49°  30',  the  duration  of 
sunshine  is  found  to  be  15^  31**. 

TABLE     62. 

TABLE  62.  Declination  of  the  sun  for  the  year  1894. 

This  table  is  an  auxiliary  to  Table  61,  and  gives  the  declination  of  the 
sun  for  every  third  day  of  the  year  1894.  These  declinations  may  be  used 
as  approximate  values  for  the  corresponding  dates  of  other  years  when  the 
exact  declination  can  not  readily  be  obtained.  Thus,  in  the  preceding 
example,  the  declination  for  May  18  may  be  taken  as  approximately  the 
same  as  that  for  the  same  date  in  1894,  viz.  19°  37'. 

RELATIVE     INTENSITY    OF    SOLAR    RADIATION   AT    DIFFERENT    LATITUDES 
FOR  DIFFERENT  SEASONS   OF  THE  YEAR. 

TABLE  63.     Mean  vertical  intensity  for  24  hours  of  solar  radiation  J  and 
the  solar  constant  A  in  terms  of  the  mean  solar  constant  A0. 

This  table  is  that  of  Prof.  Wm.  Ferrel,  published  in  the  Annual  Report  of 
the  Chief  Signal  Officer,  1885,  Part  2,  and  in  Professional  Papers  of  the  Sig- 
nal Service,  No.  14,  p.  427,  where  the  formulae  and  constants  will  be  found. 

It  gives  the  mean  vertical  intensity  for  24  hours  of  solar  radiation  J  in 
terms  of  the  mean  solar  constant  A0  for  each  tenth  parallel  of  latitude  of  the 
northern  hemisphere,  and  for  the  first  and  sixteenth  day  of  each  month  ; 
also  the  values  of  the  solar  constant  A  in  terms  of  A^  and  the  angular 
motion  of  the  sun  in  longitude  for  the  given  dates. 


CONVERSION   OF  LJNEAR   MEASURES. 

The  relation  here  adopted  between  the  metre  and  the  English  measures 
of  length  is  that  used  and  officially  authorized  by  the  U.  S.  Bureau  of 
Weights  and  Measures,  viz  : 

i  metre  =  39.3700  inches. 

TABLE     64. 

TABLE  64.  Inches  into  millimetres. 

The  argument  is  given  for  every  hundredth  of  an  inch  up  to  32.00 
inches,  and  the  tabular  values  are  given  to  hundredths  of  a  millimetre.  A 
table  of  proportional  parts  for  thousandths  of  an  inch  is  added  on  each  page. 
Example : 

To  convert  24.362  inches  to  millimetres. 

The  table  gives  (p.  184) 

(24.36  +  0.02)  inches  =(6 1 8. 75  +  0.05  mm.)  =  618.80  mm. 


1  INTRODUCTION. 

TABLE   65.  Millimetres  into  inches. 

From  o  to  400  mm.  the  argument  is  given  to  every  millimetre,  with 
subsidiary  interpolation  tables  for  tenths  and  hundredths  of  a  millimetre. 
The  tabular  values  are  given  to  four  decimals.  From  400  to  1000  mm., 
covering  the  numerical  values  which  are  of  frequent  use  in  meteorology 
for  the  conversion  of  barometric  readings  from  the  metric  to  the  English 
barometer,  the  argument  is  given  for  every  tenth  of  a  millimetre,  and  the 
tabular  values  to  three  decimals. 

Example : 

To  convert  143.34  mm.  to  inches. 
The  table  gives 
143  +  .3  +  .04  mm.  =  5.6299  +  0.0118  +  0.0016  inches  =  5.6433  inches. 

TABLE  66.  Feet  into  metres. 

From  the  adopted  value  of  the  metre,  39.3700  inches — 
i  English  foot  =  0.3048006  metre. 

Table  66  gives  the  value  in  metres  and  thousandths  (or  millimetres) 
for  every  foot  from  o  to  99  feet ;  the  value  to  hundredths  of  a  metre  (or 
centimetres)  of  every  10  feet  from  100  to  4000  feet ;  and  the  value  to  tenths 
of  a  metre  of  every  10  feet  from  4000  to  9090  feet.  In  using  the  lattei 
part,  the  first  line  of  the  table  serves  to  interpolate  for  single  feet. 

Example  : 

To  convert  47  feet  7  inches  to  metres.  47  feet  7  inches  =47.583  feet. 
The  table  gives  47      feet  =  14.326  metres. 

By  moving  the  decimal  point,  °-5^3  «      :   0.178 

47-583  feet  =  I4-5°4  metres. 
TABLE  67.  Metres  into  feet. 

i  metre  =  39.3700  inches  =  3.280833  +  feet. 

From  o  to  500  metres  the  argument  is  given  for  every  unit,  and  the 
tabular  values  to  two  decimals ;  from  500  to  5000  the  argument  is  given  to 
every  10  metres,  and  the  tabular  values  to  one  decimal.  The  conversion  foi 
tenths  of  a  metre  is  added  for  convenience  of  interpolation. 

Example : 

Convert  4327  metres  to  feet. 
The  table  gives 

(4320  -f  7)  metres  =  (14173.2  +  23.0)  feet  =  14196.2  feet. 


CONVERSION   OF  MEASURES  OF  TIME   AND  ANGI<E.  11 

TABLE   68.  Miles  into  kilometres,  TABLE  sa. 

i  mile=  1.609347  kilometres. 

The  table  extends  from  o  to  1000  miles  with  argument  to  single  miles, 
and  from  1000  to  20000  miles  for  every  1000  miles.  The  tabular  quantities 
are  given  to  the  nearest  kilometre. 

TABLE   69.  Kilometres  into  miles.  TABLE  69. 

i  kilometre  =  0.62 1 370  mile. 

The  table  extends  to  1000  kilometres  with  argument  to  single  kilo- 
metres, and   from    1000   to   20000  kilometres   for   every   1000   kilometres. 
Tabular  values  are  given  to  tenths  of  a  mile. 
Example  : 

Convert  3957  kilometres  into  miles. 
The  table  gives 

(3000  +  957)  kilometres  =  (1864.  i  +  594.7)  miles  =  2458.8  miles. 

TABLE   70.         Interconversion  of  nautical  and  statute  miles.  TABLE  TO. 

The  definition  of  the  nautical  mile  here  used  is  that  adopted  by  the 
U.  S.  Coast  and  Geodetic  Survey. 

A  nautical  mile  is  equal  to  the  length  of  one  minute  of  arc  on  the 
great  circle  of  a  sphere  whose  surface  is  equal  to  the  surface  of  the  earth. 

Computed  on  Clarke's  spheroid  of  1866,  the  nautical  mile  thus  defined 
equals  6080.27  feet.  (Report,  U.  S.  Coast  Survey,  1881,  page  354.) 

The  table  gives,  for  nautical  and  statute  miles  from  i  to  9,  the  equivalent 
in  statute  and  nautical  miles,  respectively,  to  four  decimals. 

TABLE    71. 

TABLE   71.     Continental  measures  of  length  with  their  metric  and  English 
equivalents. 

This  table  gives  a  miscellaneous  list  of  continental  measures  of  length 
alphabetically  arranged,  with  the  name  of  the  country  to  which  they  belong 
and  their  metric  and  English  equivalents. 


CONVERSION  OF  MEASURES  OF  TIME  AND  ANGLE. 
TABLE   72.  Arc  into  time. 

i°  =  4m;    i'=4s;    i"  =  ^f  =  0*067.  TABLE  72 

Example  : 

Change  124°  15'  24^7  into  time. 

From  the  table,  124°  8h      i6m      o8 

15'  *        ° 

24"  i.  600 


'' 


o.7      =  .047 

8h      i7m      1^647 


Ill  INTRODUCTION. 

TABLE  73.  Time  into  arc. 

Ih=i5°;    im=i5';    is  =  i5". 
Example : 

Change  8h  iym  1^647  into  arc. 

From  the  table,  8h  120° 

i7m       =  4       15' 

15" 

0.64    =  9.60 

By  moving  the  decimal  point,   .007  =  o.io 


124°    i5'    24':7 

TABLE   74.  Days  into  decimals  of  a  year  and  angle. 

The  table  gives  for  the  beginning  of  each  day  the  corresponding  decimal 
of  the  year  to  five  places.  Thus,  at  the  epoch  represented  by  the  beginning 
of  the  1  5th  day,  the  decimal  of  the  year  that  has  elapsed  since  January  i.o 

is  computed  from  the  fraction  —  —  —  .     The  corresponding  value  in  angle 

o 


obtained  by  multiplying  this  fraction  by  360°,  is  given  to  the  nearest  minute. 
Two  additional  columns  serve  to  enter  the  table  with  the  day  of  the 
month  either  of  the  common  or  the  bissextile  year  as  the  argument,  and 
may  be  used  also  for  converting  the  day  of  the  month  to  the  day  of  the 
year,  and  vice  versa. 

Example  : 

To  find  the  number  of  days  and  the  decimal  of  a  year  between  February 

12  and  August  27  in  a  bissextile  year. 

Aug.  27  :  Day  of  year  =  240  ;  decimal  of  a  year  =  0.65435 

Feb.   12:     "     "      "          43;        "          "       "  =0.11499 

Interval  in  days  =  197  ;   interval  in  decimal  of  a  year      =  0.53936 

The  decimal  of  the  year  corresponding  to  the  interval  197  days  may 
also  be  taken  from  the  table  by  entering  with  the  argument  198. 

TABLE  75.     Hours  ',  minutes  and  seconds  into  decimals  of  a  day. 

The  tabular  values  are  given  to  six  decimals. 
Example  : 

Convert  5h  24™  23?4  to  the  decimal  of  a  day  : 

5h     =    0^208333 

24m     =        016667 

23s      =  266 

By  interpolation,  or  by  moving  the  decimal  for  4s   0.4   =  5 

0*225271 


CONVERSION  OF  MEASURES  OF  TIMB  AND  ANGU3.  liii 

TABLE   76.     Decimals  of  a  day  into  hours ,  minutes  and  seconds. 

Example : 

Convert  0^225  271  to  hours,  minutes  and  seconds  : 

0.22          day  =  4h  48m  H-  28m  48s  =  5h  i6m  48s 
0.0052      day  =  7m  12s  +  I7f28       =          7     29.28 
0.000071  day  =     6fo5    +      0.09    =  6.14 


TABLE    77. 

TABLE  77.        Minutes  and  seconds  into  decimals  of  an  hour. 
The  tabular  values  are  given  to  six  decimals. 

Example : 

Convert  34m  28^7  to  decimals  of  an  hour. 

34m    =    0*566667 

28s      =  7778 

o!7    =  194 


0.574639 

TABLE    78. 

TABLE   78.  Mean  time  at  apparent  noon. 

This  table  gives  the  time  that  should  be  shown  by  a  clock  when  the 
sun  crosses  the  meridian,  on  the   ist,  8th,   i6th,  and  24th  days  of  each 
month.     The  table  is  useful  in  correcting  a  clock  by  means  of  a  sun-dial 
or  noon-mark. 
Example : 

To  find  the  correct  mean  time  when  the  sun  crosses  the  meridian  on 

December  15,  1891. 

The  table  gives  for  December  16,  nh  56m.  By  interpolating,  it  is  seen 
that  the  change  to  December  15  would  be  less  than  one-half  minute ; 
the  correct  clock  time  is  therefore  4  minutes  before  12  o'clock  noon. 

TABLES    79,    8O. 

TABLE   79.  Sidereal  time  into  mean  solar  time. 

TABLE   80.  Mean  solar  time  into  sidereal  time. 

According  to  Bessel,  the  length  of  the  tropical  year  is  365.24222  mean 
solar  days,*  whence 

365.24222  solar  days  =  366.24222  sidereal  days. 
Any  interval  of  mean  time  may  therefore  be  changed  into  sidereal 

time  by  increasing  it  by  its part,  and  any  interval  of  sidereal  time 

365.24222  *  i 

may  be  changed  into  mean  time  by  diminishing  it  by  its  -— ^ part. 

*The  length  of  the  tropical  year  is  not  absolutely  constant.    The  value  here  given 
is  for  the  year  1800.     Its  decrease  in  100  years  is  about  0.6  s.  ^^  ^^ 

OF  THE 

UNIVERSITY 


liv  INTRODUCTION. 

Table  79  gives  the  quantities  to  be  subtracted  from  the  hours,  minutes 
and.  seconds  of  a  sidereal  interval  to  obtain  the  corresponding  mean  time 
interval,  and  Table  80  gives  the  quantities  to  be  added  to  the  hours,  minutes 
and  seconds  of  a  mean  time  interval  to  obtain  the  corresponding  sidereal 
interval.  The  correction  for  seconds  is  sensibly  the  same  for  either  a  sidereal 
or  a  mean  time  interval  and  is  therefore  given  but  once,  thus  forming  a  part 
of  each  table. 
Examples  : 

Change  14**  25m  36f2  sidereal  time  into  mean  solar  time. 

Given  sidereal  time  i4n     25m     36!2 

Correction  for  i4h  =  — -2m  i7!6i 

25m  =  —         4. 10 

36?2  =  —  10 

—  2     21. 81  —2       21.8 


Corresponding  mean  time  =  1423       14.4 

Change  i3h  37m  22^7  mean  solar  time  into  sidereal  time. 
Given  mean  time  =  i3h    37m     22f7 

Correction  for  i2h  =  +  2m     8?  13 

37m  =  +         6.08 

22?7  =  -f  0.06 

+  2       14.27  +  2          14.3 

Corresponding  sidereal  time          =  13      39       37.0 


MISCELLANEOUS    TABLES. 

DENSITY  OF  AIR  AT  DIFFERENT  TEMPERATURES,    HUMIDITIES  AND 

PRESSURES. 

The  following  tables  (81   to  86)  give  the  factors  for  computing  the 
density  of  air  at  different  temperatures,  humidities  and  pressures. 

The    formula    from   which    they   have    been   computed    is,   in   metric 
measures, 

g  =  0.00129305  [7.111 6153]  /b  —  o.378e\ 
i  +  0.00367  /  \      760       / 

in  which  S  is  the  weight  of  a  cubic  centimetre  of  air  expressed  in  grammes, 
under  the  standard  value  of  gravity  at  latitude  45°  and  sea 
level. 

b  is  the  barometric  pressure  in  millimetres. 
e  is  the  pressure  of  aqueous  vapor  in  millimetres. 
t  is  the  temperature  in  Centigrade  degrees. 

For  dry  atmospheric  air  (containing  0.0004  °f  its  weight  of  carbonic 
acid)  at  a  pressure  of  760  mm.  and  temperature  o°  C.,  the  absolute  density, 


MISCELLANEOUS    TABLES.  lv 

or  the  weight  of  one  cubic  centimetre,  is  0.00129305  gramme.  (Inter- 
national Bureau  of  Weights  and  Measures  :  Travaux  et  Mtmoires,  t.  I, 
P-  A  54.) 

In  English  measures,  the  formula  becomes 

g  =  0.00129305  /£  —  0.378  e\ 

1x0.0020389(^—32°)   \     29.921     / 

where  8  is  defined  as  before,  but  b  and  e  are  expressed  in  inches  and  t  in 
Fahrenheit  degrees.  Thus  by  the  use  of  tables  based  on  these  two  formulae, 
lines  of  equal  atmospheric  density  may  be  drawn  for  the  whole  world 
(neglecting  slight  variations  in  gravity),  whether  the  original  observations 
are  in  English  or  metric  measures.  Prof.  Cleveland  Abbe  has  kindly  fur- 
nished for  the  present  volume  the  logarithms  of  the  density  given  in  the 
accompanying  tables  (81  to  86). 

TABLE     81. 

TABLE   81.     Density  of  air  at  different  temperatures  Fahrenheit. 

This  table  gives  the  values  and  logarithms  of  the  expression 

0.00129305 

i  +  0.0020389  (/  —  32°) 

for  values  of  t  extending  from  —45°  F.  to  140°  F.,  the  intervals  between 
o°  F.  and  110°  F.  being  i° 

The  tabular  values  are  given  to  five  significant  figures. 

TABLES  82.  83, 

Density  of  air  at  different  humidities  and  pressures  —  English  measures. 
TABLE   82.     Term  for  humidity  ;   auxiliary  to  Table  83. 


TABLE  83.     Values  of  -        '— 

29.921 

Table  82  gives  values  of  0.378  e  to  three  decimal  places  as  an  aid  to  the 
use  of  Table  83. 

The  argument  is  the  dew-point  given  for  every  degree  from  —  40°  F.  to 
140°  F.  A  second  column  gives  the  corresponding  values  of  the  vapor 
pressure  (<?)  according  to  Broch. 

Table  83  gives  values  and  logarithms  of  -  =  ------  —  —  for  values 

29.921          29.921 

of  h  extending  from  10.0  to  31.7  inches.     The  logarithms  are  given  to  five 
significant  figures  and  the  corresponding  numbers  to  four  decimals. 

Example  : 

The  air  temperature  is  68°  F.,  the  pressure  is  29.36  inches  and  the  dew- 

point  51°  F.     Find  the  logarithm  of  the  density. 

Table  81,  for  t=  68.°  F.,  gives  7.08085  —  10 

Table  82,  for  dew-point  51°,  gives  0.378  <?  =  0.141  inch, 
Table  83,  for  h  =  £  —  0.378  £  =  29.36  —  0.14  =  29.22,  gives    9.98941  —  10 

30 

Logarithm  of  density  =  7.07056  —  10 


Ivi  INTRODUCTION. 

TABLE  84.     Density  of  air  at  different  temperatures  Centigrade. 
This  gives  values  and  logarithms  of  the  expression 

g  0.00129305 

A  760   -  I+<X00367/ 

for  values  of  /  extending  from  —  34*  C.  to  69°  C.     The  tabular  values  are 
given  to  five  significant  figures. 


Density  of  air  at  different  humidities  and  pressures — Metric  measures. 
&BLE  85.     Term  for  > 
TABLE  86.     Values  of 


TABLE  85.     Term  for  humidity:   values  of  0.378*?. 

h    _b  —  0.3781 
760  ~~       '  760 

Table  85  gives  values  of  0.378^  to  hundredths  of  a  millimetre  for  dew- 
points  extending  by  intervals  of  i  °  from  —  30°  C.  to  50°  C.  The  values  of 
Broch's  vapor  pressures  (e)  corresponding  to  these  dew-points  are  given  in  a 
second  column  to  hundredths  of  a  millimetre.  The  table  is  thus  conveniently 
used  when  either  the  vapor  pressure  or  the  dew-point  is  known. 

Table  86  gives  values  and  logarithms  of  —i-  = ^Z —  for  values  of 

760  760 

h  extending  from  300  to  800  mm;  The  barometric  pressure  b  is  the  barom- 
eter reading,  corrected  for  temperature  and  0.378^  is  the  term  for  humidity 
obtained  from  Table  85.  The  logarithms  are  given  to  five  significant  figures 
and  the  corresponding  numbers  to  four  decimal  places. 

TABLE   87.     Conversion  of  avoirdupois  pounds  and  ounces  into  kilogrammes. 

The  latest  comparisons  made  by  the  International  Bureau  of  Weights 
and  Measures  between  the  Imperial  standard  pound  and  the  "kilogramme 
proto-type ' '  result  in  the  relation  : 

i  pound  avoirdupois  =  453.592  427  7  grammes. 

This  value  has  been  adopted  by  the  United  States  Bureau  of  Weights 
and  Measures  and  is  here  used. 

For  the  conversion  of  pounds,  Table  87  gives  the  argument  for 
every  tenth  of  a  pound  up  to  9.9,  and  the  tabular  conversion  values  to 
ten-thousandths  of  a  kilogramme. 

For  the  conversion  of  ounces,  the  argument  is  given  for  every  tenth  of 
an  ounce  up  to  15.9,  and  the  tabular  values  to  ten- thousandths  of  a  kilo- 
gramme. 

TABLE   88.     Conversion  of  kilogrammes  into  avoirdupois  pounds  and  ounces. 
From  the  above  relation  between  the  pound  and  the  kilogramme, 

i  kilogramme  =    2.204622  avoirdupois  pounds. 
=  35.274        avoirdupois  ounces. 


MISCELLANEOUS    TABLES.  Ivii 

The  table  gives  the  value  to  thousandths  of  a  pound  of  every  tenth  of 
a  kilogramme  up  to  9.9  ;  the  values  of  tenths  of  kilogrammes  in  ounces  to 
four  decimals  ;  and  the  values  of  hundredths  of  a  kilogramme  in  pounds  and 
ounces  to  three  and  two  decimals  respectively. 

TABLES    89,    9O. 

TABLE   89.     Conversion  of  grains  into  grammes. 
TABLE   90.     Conversion  of  grammes  into  grains. 

From  the  above  relation  between  the  pound  and  the  kilogramme, 

i  gramme  =  15.432356  grains. 

i  grain      =   0.06479892  gramme. 

Table  89  gives  to  ten-thousandths  of  a  gramme  the  value  of  every 
grain  from  i  to  99,  and  also  the  conversion  of  tenths  and  hundrMths  of  a 
grain  for  convenience  in  interpolating. 

Table  90  gives  to  hundredths  of  a  grain  the  value  of  every  tenth  of  a 
gramme  from  o.i  to  9.9,  and  the  value  of  every  gramme  from  i  to  99.  The 
values  of  hundredths  and  thousandths  of  a  gramme  are  added  as  an  aid  to 
interpolation. 

The  computation  of  these  two  tables  has  been  furnished  by  Professor 
William  Libbey,  who  has  used  the  relation,  i  gramme  =  15.432  531  grains. 
This  value  is  practically  identical  with  the  relation  above  adopted,  differing 
from  it  by  about  i  part  in  3,000,000. 

TABLE     91 

TABLE   91.     Conversion  of  units  of  magnetic  intensity. 


This  table  gives  the  conversion  factors  from  i  to  9  for  converting 
lish  measures  of  magnetic  intensity  into  C.  G.  S.  measures,  and  vice  versa. 

The  English  unit  of  magnetic  intensity  is  the  force  which,  acting  for 
i  second  on  a  unit  of  magnetism  associated  with  a  mass  of  i  grain,  produces 
a  velocity  of  i  foot  per  second. 

The  C.  G.  S.  unit  of  magnetic  intensity  is  the  dyne  —  the  force  which, 
acting  upon  one  gramme  for  i  second,  generates  a  velocity  of  i  centimetre 
per  second.  The  Gaussian  unit  of  magnetic  intensity,  which  has  been 
extensively  used,  is  a  force  which,  acting  upon  a  mass  of  i  milligramme  for 
i  second,  generates  a  velocity  of  i  millimetre  per  second. 

By  using  the  dimensions  of  magnetic  intensity  [M*/I^T],  the  inter- 
conversion  of  these  units  is  easily  made. 


C.  G.  S.  unit  ==    |I22lM,  Gaussian  units 
N    10  1, 

=        10        Gaussian  units 


C.  G.  S.  unit  =          -  £nglish  units 

.03280833  L 

=      21.6882  English  units 


Iviii  INTRODUCTION. 

TABLE   92.     Quantity  of  water  corresponding  to  given  depths  of  rainfall. 

This  table  gives  for  different  depths  of  rainfall  over  an  acre  and  a 
square  mile  the  total  quantity  of  water  measured  in  imperial  gallons  and 
tons  respectively. 

TABLE  93.    Dates  of  Dove' s  pentades. 

For  tabulating  and  averaging  meteorological  data,  Dove  divided  the 
year  into  seventy-three  intervals  of  five  days  each,  which  have  been  called 
Dove's  pentades,  and  this  system  of  averaging  has  been  used  in  the 
publication  of  a  very  considerable  amount  of  meteorological  data.  Table 
93  gives  the  initial  and  terminal  dates  of  each  pentade  throughout  the  year. 

TABLE  94.  Division  by  28  of  numbers  from  28  to  867972. 
TABLE  95.  Division  by  29  of  numbers  from  29  to  898971. 
TABLE  96.  Division  by  31  of  numbers  from  31  to  960969. 

The  frequent  occasion  in  meteorological  work  to  divide  by  the  numbers 
28,  29  and  31  renders  useful  the  division  tables  compiled  by  Mr.  H.  A. 
Hazen  {Handbook  of  Meteorological  Tables^  Washington,  D.  C.,  1888),  the 
use  of  which  has  been  kindly  granted. 

As  here  printed,  the  dividend  is  given  in  plain  type  and  the  quotient  in 
heavy-face  type,  and  in  order  that  one  shall  never  be  mistaken  for  the  other,  a 
column  is  given  containing  the  letters  D  and  Q  successively,  which 
designates  that  all  figures  on  a  line  with  D  are  dividends,  and  all  on 
a  line  with  Q  are  quotients.  The  four  columns  to  the  right  of  this  D-Q 
column  give  the  last  two  figures  of  the  dividend  and  of  the  quotient, 
namely,  the  units  and  tens.  The  ten  columns  to  the  left  side  of  the 
D-Q  column  give  the  preceeding  figures  of  the  dividend,  namely,  the 
hundreds,  thousands,  and  tens  of  thousands.  These  two  parts  of  the 
dividend — to  th.e  left  and  right  of  the  D-Q  column — are  always  to  be  taken 
on  the  same  horizontal  line. 

Kach  dividend  is  an  exact  multiple  of  the  divisor,  hence  each  quotient 
is  exact  or  without  remainder. 

For  example,  the  dividend  17360  in  Table  94  is  found  in  two  parts ; 
173  is  found  in  the  column  headed  600  on  the  left-hand  side  of  the  D-Q 
column,  and  60  in  the  same  horizontal  row  in  the  third  column  on  the  right- 
hand  side. 

The  hundreds  figure  of  the  quotient  is  given  in  bold-face  type  at  the 
top,  middle  and  bottom  of  the  page,  and  each  one  obtains  for  all  the  dividend 
figures  in  its  own  column.  The  units  and  tens  figures  of  the  quotient  are 
found,  as  already  stated,  on  the  right  side  of  the  D-Q  column  directly  under 
the  last  two  figures  of  the  dividend.  Thus  in  the  above  example,  for  dividend 
17360  the  hundreds  figure  of  the  quotient  is  6  and  the  units  and  tens  will  be 
20,  or  the  quotient  of  17360  divided  by  28  is  620.  When  any  given  dividend 


MISCELLANEOUS    TABLES.  lix 

is  not  an  exact  multiple  of  the  divisor,  the  nearest  even  multiple  as  given  in 
the  table  must  be  used. 

For  example.  23979  -5-  28  =  856  ;  the  8  is  in  the  9th  column  above  239 
and  the  56  is  under  68,  the  nearest  figure  to  79  in  the  right-hand  part  of 
the  table. 

The  last  column,  which  is  separated  from  the  rest  of  the  table  by  a 
triple  line,  is  to  be  used  when  the  quotient  exceeds  three  figures,  or  999. 

The  bold-face  figures  in  this  column  give  the  thousands  and  tens  of 
thousands  figures  of  the  quotient,  and  the  plain  figures  are  the  multiples 
thereof  by  the  divisor.  To  use  the  column,  find  in  it  the  number  which, 
with  three  ciphers  added,  comes  nearest  to  (but  is  less  than)  the  dividend  ; 
the  heavy-face  figures  beneath  it  will  be  the  first  figures  of  the  quotient. 
Subtract  this  multiple  number  from  the  given  dividend,  and  with  the 
remainder  enter  the  main  body  of  the  table  to  obtain  the  last  three  figures 
of  the  quotient  as  already  described. 

For  example  :  Divide  833885  by  28.  The  nearest  figure  to  833000  in  the 
last  column  is  812000  and  the  quotient  29000.  833885  —  812000^=21885. 
Under  218  we  have  7,  and  under  96,  the  nearest  figure  to  85  on  the  right, 
we  find  82.  833885-^28  =  29782. 

TABLE     97. 

TABLE   97.     Natural  sines  and  cosines. 

TABLE     98. 

TABLE   98.     Natural  tangents  and  cotangents. 

TABLE     99. 

TABLE   99.     Logarithms  of  numbers. 

TABLE    100. 

TABLE  100.     List  of  meteorological  stations. 

This  list  of  meteorological  stations  has  been  compiled  for  this  volume 
from  data  furnished  by  the  United  States  Weather  Bureau. 

A  geographical  arrangement  has  been  adopted  as  being  most  serviceable 
for  the  purposes  for  which  the  table  will  most  generally  be  used. 

In  making  the  selection  of  stations  from  the  vast  number  available,  the 
object  has  been  to  choose  such  of  the  higher  order  stations  as  will  fairly 
represent  the  varied  climatic  conditions  of  each  country.  With  few  excep- 
tions, the  stations  are  active  ;  in  all  cases  there  are  published  observations, 
which  may  generally  be  found  in  the  monthly  and  annual  reports  of  the 
national  meteorological  services  of  the  countries  in  which  the  stations  are 
situated,  or  by  which  they  are  politically  controlled. 

So  far  as  known,  the  list  contains  all  first  order  stations,  i.  e. ,  those  at 
which  the  principal  meteorological  elements  are  either  recorded  continuously 
and  automatically,  or  are  observed  at  hourly  or  bi-hourly  intervals ;  such 
stations  are  designated  by  an  asterisk  (*). 

The  names  of  the  stations  have  been  given  in  the  native  orthography, 
which  is  in  all  cases  the  form  adopted  by  the  national  meteorological  service 
in  its  official  publications. 

GEORGE    E.    CURTIS 


THERMOMETRICAI,   TABLES. 

Conversion  of  thermometric  scales  — 

Reaumur  scale  to  Fahrenheit  and  Centigrade  .... 

Fahrenheit  scale  to  Centigrade        .     .     .     .     »  .     .     .     .     TABLE  2 

Centigrade  scale  to  Fahrenheit       .     .     .     .     .  .     .     .     .     TABLE  3 

Centigrade  scale  to  Fahrenheit,  near  the  boiling  point  of 

water    ....     ..    .     .     .     »     .     ...     .     .     .     .     TABLE  4 


DijGferences  Fahrenheit  to  differences  Centigrade   ....  TABI,^  5 

Differences  Centigrade  to  differences  Fahrenheit   ....  TABI,E  6 

Reduction  of  temperature  to  sea  level  —  English  measures      .  TABI,E  7 

Reduction  of  temperature  to  sea  level  —  Metric  measures   .     .  TABI,E  8 

Correction  for  the  temperature  of  the  mercury  in  the  ther- 
mometer stem.      For  Fahrenheit  and  Centigrade  ther- 

mometers      ......     .     .     .     .    .     .     .     .     .  TABLE  9 


TABLE  1. 

REAUMUR    SCALE   TO    FAHRENHEIT   AND    CENTIGRADE. 


Reau- 
mur 

Fahrenheit 

Centigrade 

Reau- 
mur 

Fahrenheit 

Centigrade 

Reau- 
mur 

Fahrenheit 

Centigrade 

Prop.  Parts 

+80° 

+2I2?00 

+I00?00 

+40° 

+I22?00 

+5o?oo 

±   0° 

+32?oo 

±  o?oo 

79 

209.75 

98.75 

39 

H9.75 

48.75 

—    i 

29.75 

-  1.25 

78 

207.50 

97.50 

38 

117.50 

47-50 

2 

27.50 

2.50 

77 

205.25 

96.25 

37 

115.25 

46.25 

3 

25.25 

3-75 

R. 

F. 

76 

203.00 

95-00 

36 

113.00 

45-00 

4 

23.00 

5.00 

O.I 
.2 

0.225 
.450 

+75 

+200.75 

+  93.75 

+35 

+H0.75 

+43-75 

-   5 

+20.75 

-6.25 

.3 
•4 

.675 
.900 

74. 

198.50 

92.50 

34 

108.50 

42.50 

6 

18.50 

7.50 

.5 

1.125 

73 

196-25 

9I-25 

33 

106.25 

41.25 

7 

16.25 

8.75 

.6 

1-350 

72 

194.00 

90.00 

32 

104.00 

40.00 

8 

14.00 

10.00 

•7 
.8 

1-575 
1.800 

7i 

I9L75 

88.75 

3i 

101.75 

38.75 

9 

H.75 

11.25 

0.9 

2.025 

+70 

+189.50 

+  87.50 

+30 

+  99.50 

+37.50 

-10 

+  9.50 

—12.50 

69 

187-25 

86.25 

29 

97-25 

36-25 

ii 

7.25 

13.75 

68 

185.00 

85.00 

28 

95.00 

35.oo 

12 

5.00 

15.00 

67 

182.75 

83.75 

27 

92.75 

33-75 

13 

2.75 

16.25 

R. 

O.I 

C. 

0.125 

66 

180.50 

82.50 

26 

90.50 

32.50 

14 

+  0.50 

17.50 

.2 

.250 

•3 

•375 

+65 

+178.25 

+  81.25 

+25 

+  88.25 

+3T-25 

-15 

-  L75 

-18.75 

•4 

•500' 

64 

176^00 

80.00 

24 

86.00 

30.00 

16 

4.00 

20.00 

•5 

•625 

63 

173.75 

78.75 

23 

83.75 

28.75 

17 

6.25 

21.25 

.6 

•750 

62 

171.50 

77-50 

22 

81.50 

27.50 

18 

8.50 

22.50 

•7 
.8 

.875 

I.OOO 

61 

169.25 

76.25 

21 

79-25 

26.25 

19 

10.75 

23.75 

0.9 

1.125 

+60 

+167.00 

+  75-00 

+20 

+  77-00 

+25.00 

-20 

—13.00 

—25.00 

59 

164.75 

73-75 

19 

74-75 

23.75 

21 

15.25 

26.25 

58 

162.50 

72.50 

18 

72.50 

22.50 

22 

17.50 

27.50 

F. 

'C. 

57 

160.25 

71.25 

17 

70.25 

21.25 

23 

19.75 

28.75 

0.25 

0.14 

56 

158.00 

70.00 

16 

68.00 

20.00 

24 

22.00 

30.00 

•50 

.28 

•75 

.42 

+55 

+155.75 

+  68.75 

+  15 

+  65.75 

+I8-75 

-25 

-24.25 

-31.25 

I.OO 

.56 

54 

153.50 

67-50 

14 

63-50 

17.50 

26 

26.50 

32.50 

1-25 

.69 

53 

I5L25 

66.25 

13 

61.25 

16.25 

27 

28.75 

33.75 

1.50 
1.75 

•83 
•97 

52 

149.00 

65.00 

12 

59.00 

15.00 

28 

31.00 

35.00 

2.OO 

i.  ii 

5i 

146.75 

63.75 

II 

56.75 

13.75 

29 

33.25 

36.25 

+50 

+144.50 

+  62.50 

+  10 

+  54-50 

+12.50 

-30 

-35.50 

-37.50 

49 

142.25 

61.25 

9 

52.25 

11.25 

3i 

37-75 

38.75 

C. 

F. 

48 

140.00 

60.00 

8 

50.00 

10.00 

32 

40.00 

40.00 

0.05 

0.09 

47 

137.75 

58.75 

7 

47.75 

8.75 

33 

42.25 

41.25 

.10 

.18 

46 

135.50 

57-50 

6 

45.50 

7.50 

34 

44.50 

42.50 

.15 

.20 

.27 

•36 

+45 

+133.25 

+  56.25 

+  5 

+  43-25 

+  6.25 

-35 

-46.75 

-43.75 

.25 

•45 

44 

131.00 

55-00 

4 

41.00 

5-oo 

36 

49.00 

45.00 

•5° 

•75 

.90 
i-35 

43 

128.75 

53-75 

3 

38.75 

3-75 

37 

5L25 

46.25 

I.OO 

1.80 

42 

126.50 

52.50 

2 

36-50 

2.50 

38 

53.50 

47.50 

4i 

124.25 

51.25 

+     I 

34.25 

+  1.25 

39 

55-75 

48.75 

+40 

+122.  OO 

+  50.00 

±  0 

+  32-00 

±    0.00 

-40 

-58.00 

—50.00 

F°  =  ~  C°+  32°                C°  =  ~  (F°-  32°)              R°  =  4  (F°—  32°) 
o                                     9                                     y 

=  -|  R°+  32°                   =  -|  R°                             =  j  C° 

SMITHSONIAN  TABLES. 


TABLE  2, 


FAHRENHEIT    SCALE    TO    CENTIGRADE. 


Fahren- 
heit. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

C. 

c. 

+130° 

+54°44 

+54?5o 

+54"56 

+54°6i 

+54°67 

+54?72 

+54?78 

+54?83 

+54°89 

+54°94 

129 

53-89 

53-94 

54-00 

54.06 

54-11 

54-17 

54-22 

54.28 

54-33 

54-39 

128 

53-33 

53-39 

53.44 

53.50 

53.56 

53-6i 

53.67 

53-72 

53.78 

53.83 

127 

52.78 

52-83 

52.89 

52.94 

53-00 

53-06 

53-n 

53.17 

53-22 

53-28 

126 

52.22 

52.28 

52.33 

52.39 

52.44 

52.50 

52.56 

52.61 

52.67 

52.72 

+125 

+5I-67 

45T-72 

+5L78 

+51.83 

+51-89 

+51-94 

+52.00 

+52.06 

+52.11 

+52.17 

124 

51.11 

5!-i7 

51.22 

51.28 

51.33 

5L39 

51.44 

51.50 

51-56 

51.61 

123 

50.56 

50.61 

50.67 

50.72 

50.78 

50.83 

50.89 

50.94 

51.00 

51.06 

122 

50.00 

50.06 

50.11 

50.17 

50.22 

50.28 

50.33 

50.39 

50.44 

50.50 

121 

49-44 

49.50 

49.56 

49.61 

49.67 

49.72 

49.78 

49-83 

49.89 

49.94 

+120 

+48.89 

+49.94 

+49.00 

+49.06 

+49.11 

+49.17 

+49.22 

+49.28 

+49-33 

+49-39 

119 

48.33 

48.39 

48.44 

48.50 

48.56 

48.61 

48.67 

48.72 

48.78 

48.83 

118 

47.78 

47.83 

47.89 

47.94 

48.00 

48.06 

48.11 

48.17 

48.22 

'  48.28 

117 

47.22 

47.28 

47-33 

47.39 

47-44 

47-50 

47.56 

47.6i 

47.67 

47-72 

116 

46.67 

46.72 

46.78 

46.83 

46.89 

46.94 

47.00 

47.06 

47.11 

47-17 

+  115 

+46.11 

+46.17 

+46.22 

+46.28 

+46.33 

+46.39 

+46.44 

+46.50 

+46.56 

+46.61 

114 

45-56 

45.61 

45.67 

45.72 

45.78 

45-83 

45.89 

45-94 

46.00 

46.06 

113 

45.00 

45-o6 

45.ii 

45-17 

45-22 

45.28 

45-33 

45-39 

45-44 

45-50 

112 

44-44 

44-50 

44.56 

44.61 

44.67 

44.72 

44.78 

44.83 

44-89 

44-94 

III 

43-89 

43.94 

44.00 

44.06 

44.11 

44.17 

44.22 

44-28 

44-33 

44-39 

+  110 

+43-33 

+43-39 

+43-44 

+43-50 

+43.56 

+43.6i 

+43-67 

+43-72 

+43.78 

+43.83 

109 

42.78 

42.83 

42.89 

42.94 

43.00 

43.o6 

43-11 

43-17 

43.22 

43.28 

108 

42.22 

42.28 

42-33 

42.39 

42.44 

42.50 

42.56 

42.61 

42.67 

42.72 

107 

41.67 

41.72 

41.78 

41.83 

41.89 

41.94 

42.00 

42.06 

42.11 

42.17 

106 

41.11 

41.17 

41.22 

41.28 

41.33 

41-39 

41.44 

41.50 

41.56 

41.61 

+105 

+40.56 

+40.61 

+40.67 

+40.72 

+40.78 

+40.83 

+40.89 

+40.94 

+41.00 

+41.06 

'104 

40.00 

40.06 

40.11 

40.17 

40.22 

40.28 

40.33 

40-39 

40.44 

40.50 

103 

39-44 

39-50 

39.56 

39.61 

39.67 

39.72 

39-78 

39-83 

39-89 

39-94 

1  02 

38.94 

39.00 

39.06 

39.11 

39-17 

39-22 

39.28 

39.33 

39-39 

IOI 

38'-33 

38.39 

38.44 

38.50 

38.56 

38.61 

38.67 

38.72 

38.78 

38-83 

+100 

+37-78 

+37.83 

+37.89 

+37-94 

+38.00 

+38.06 

+38.11 

+38.17 

+38.22 

+38.28 

99 

37.22 

37-28 

37-33 

37-39 

37.44 

37.50 

37.56 

37.61 

37-67 

37-72 

98 

36.67 

36.72 

36.78 

36.83 

36.89 

36.94 

37.00 

37-o6 

37-11 

37-17 

97 

*• 

36.11 

36.17 

36.22 

36.28 

36.33 

36.39 

36.44 

36-50 

36-56 

36-61 

96 

35-56 

35.6i 

35.67 

35.72 

35.78 

35.83 

35.89 

35-94 

36.00 

36.06 

+  95 

+35-00 

+35-06 

+35-11 

+35-17 

+35.22 

+35-28 

+35-33 

+35-39 

+35-44 

+35.50 

94 

34.44 

34-50 

34.56 

34.61 

34.67 

34-72 

34.78 

34-83 

34.89 

34-94 

93 

33.89 

33-94 

34.00 

34.o6 

34.11 

34.17 

34-22 

34.28 

34-33 

34-39 

92 

33-33 

33-39 

33-44 

33-50 

33.56 

33-61 

33.67 

33.72 

33.78 

33.83 

91 

32.78 

32.83 

32.89 

32.94 

33-00 

33.o6 

33-n 

33-17 

33-22 

33.28 

+  90 

+32.22 

+32.28 

+32.33 

+32.39 

+32.44 

+32-50 

+32-56 

+32.61 

+32.67 

+32.72 

89 

31-67 

31.72 

31.78 

31-83 

31.89 

31-94 

32.00 

32.06 

32.11 

33-17 

88 

31.11 

3I-I7 

31.22 

31-28 

31.33 

31-39 

3!-44 

3T-5o 

31.56 

31.61 

87 

30.56 

30.61 

30.67 

30.72 

30.78 

30.83 

30.89 

30.94 

31.00 

31.06 

86 

30.00 

30.06 

30.11 

30.17 

30.22 

30.28 

30.33 

30-39 

30.44 

30.50 

+  85 

+29.44 

+29-50 

+29.56 

+29.61 

+29.67 

+29.72 

+29-78 

+29.83 

+29.89 

+29.94 

84 

28.89 

28.94 

29.00 

29.06 

29.11 

29.17 

29.22 

29.28 

29.33 

29.39 

83 

28.33 

28.39 

28.44 

28.50 

28.56 

28.61 

28.67 

28.72 

28.78 

28.83 

82 

27.78 

27.83 

27.89 

27.94 

28.00 

28.06 

28.11 

28.17 

28.22 

28.28 

81 

27.22 

27.28 

27-33 

27.39 

27.44 

27.50 

27.56 

27.61 

27.67 

27.72 

+  80 

+26.67 

+26.72 

+26.78 

+26.83 

+26.89 

+26.94 

+27.00 

+27.06 

+27.11 

+27.17 

.O 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

SMITHSONIAN  TABLES. 


TABLE  2. 


FAHRENHEIT   SCALE   TO    CENTIGRADE. 


Fahren 
heit. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

+80° 

+26?67 

+26?72 

+26?78 

+26?83 

+26?89 

+26?94 

+27?00 

+27?o6 

+27?n 

+27?i7 

79 

26.11 

26.17 

26.22 

26.28 

26.33 

26.39 

26.44 

26.50 

26.56 

26.61 

78 

25-56 

25.61 

25.67 

25-72 

25.78 

25.83 

25.89 

25-94 

26.00 

26.06 

77 

25.00 

25.06 

25.11 

25.17 

25.22 

25.28 

25.33 

25-39 

25.44 

25-50 

76 

24.44 

24.50 

24.56 

24.61 

24.67 

24-72 

24.78 

24.83 

24.89 

24.94 

+75 

+23.89 

+23.94 

+24.00 

+24.06 

+24.11 

+24.17 

+24.22 

+24.28 

+24.33 

+24-39 

74 

23.33 

23-39 

23-44 

23-50 

23.56 

23.61 

23.67 

23.72 

23.78 

23-83 

73 

22.78 

22.83 

22.89 

22.94 

23.00 

23.06 

23.11 

23.17 

23.22 

23.28 

72 

22.22 

22.28 

22.33 

22.39 

22.44 

22.50 

22.56 

22.61 

22.67 

22.72 

7i 

21.67 

21.72 

21.78 

21.83 

21.89 

21-94 

22.00 

22.06 

22.11 

22.17 

+70 

+21.  II 

+21.17 

+21.22 

+21.28 

+21.33 

+21.39 

+21.44 

+21.50 

+21.56 

+21.  6l 

69 

20.56 

20.  6  1 

20.67 

20.72 

20.78 

20.83 

20.89 

20.94 

21.00 

21.  06 

68 

2O.OO 

20.06 

20.11 

20.17 

20.22 

20.28 

20.33 

20.39 

20.44 

20.50 

67 

19.44 

19-50 

19.56 

19.61 

19.67 

19.72 

19.78 

19-83 

I9.89 

19.94 

66 

18.89 

18.94 

19.00 

19.06 

19.11 

19.17 

19.22 

19.28 

19.33 

J9-39 

+65 

+18.33 

+18.39 

+r8.44 

+18.50 

+18.56 

+18.61 

+18.67 

+18.72 

+18.78 

+18.83 

64 

17.78 

17.83 

17.89 

17.94 

18.00 

1  8.  06 

i8.ii 

18.17 

18.22 

18.28 

63 

17.22 

17.28 

J7.33 

!7-39 

17.44 

.17-50 

17-56 

17.61 

17.67 

17.72 

62 

16.67 

16.72 

16.78 

16.83 

16.89 

16.94 

17.00 

17.06 

17.11 

17.17 

61 

16.11 

16.17 

16.22 

16.28 

16.33 

16.39 

16.44 

16.50 

16.56 

16.61 

+60 

+15-56 

+15.61 

+15-67 

+15.72 

+15.78 

+15.83 

+15.89 

+15-94 

+16.00 

+  1  6.  06 

59 

15.00 

15.06 

15-11 

I5.I7 

15.22 

15-28 

15.33 

15.39 

15-44 

15-50 

58 

14.44 

14.50 

14.56 

14.61 

14.67 

14.72 

14.78 

14.83 

14.89 

14.94 

57 

13-89 

13.94 

14.00 

14.06 

14.11 

14.17 

14.22 

14.28 

14-33 

'4-39 

56 

13.33 

13.39 

13.44 

13-50 

I3-56 

13.61 

13.67 

13.72 

I3-78 

13-83 

+55 

+12.78 

+12.83 

+12.89 

+12.94 

+13.00 

+13-06 

+I3-H 

+13-17 

+13-22 

-$13.28 

54 

12.22 

12.28 

12.33 

12.39 

12.44 

12.50 

12.56 

12.  6l 

12.67 

12.72 

53 

11.67 

11.72 

11.78 

11.83 

11.89 

11.94 

12.  OO 

12.  06 

12.11 

12.17 

52 

II.  II 

11.17 

11.22 

11.28 

H-33 

n-39 

11.44 

11.50 

11.56 

11.  61 

5i 

10.56 

10.  6  1 

10.67 

10.72 

10.78 

10.83 

10.89 

10.94 

II.  OO 

11.06 

+50 

+10.00 

+10.06 

+10.  1  1 

+10.17 

+10.22 

+10.28 

+10.33 

+10.39 

+10.44 

+10.50 

49 

9-44 

9-50 

9.56 

9.61 

9.67 

9.72 

9-78 

9.83 

9.89 

9-94 

48 

8.89 

8.94 

9.00 

9.06 

9.II 

9.17 

9.22 

9.28 

9-33 

9-39 

47 

8.33 

8-39 

8.44 

8.50 

8.56 

8.61 

8.67 

8.72 

8.78 

8.63! 

46 

7-78 

7-83 

7.89 

7.94 

8.00 

8.06 

8.  ii 

8.17 

8.22 

8.28 

+45 

+  7-22 

+  7.28 

+  7.33 

+  7-39 

+  7-44 

+  7-50 

+  7.56 

+    7.6l 

+  7.67 

+  7-72! 

44 

6.67 

6.72 

6.78 

6.83 

6.89 

6.94 

7.00 

7.06 

7.11 

7.171 

43 

6.ii 

6.17 

6.22 

6.28 

6.33 

6-39 

6.44 

6.50 

6.56 

6.61 

42 

5.56 

5-6i 

5.67 

5-72 

5.78 

5.83 

5-89 

5-94 

6.00 

6.06 

4i 

5-00 

5.06 

5-ii 

5.17 

5-22 

5-28 

5-33 

5-39 

5-44 

5.50 

+40 

+  4-44 

+  4-50 

+  4-56 

+  4.61 

+  4.67 

+  4-72 

+  4-78 

+  4-83 

+  4.89 

+  4-94 

39    < 

:>8* 

3-94 

4.00 

4.06 

4.11 

4.17 

4.22 

4.28 

4-33 

4-39 

38 

3-39 

3-44 

3-50 

3.56 

3-6i 

3-67 

3-72 

3.78 

3-83 

37 

2.78 

2.83 

2.89 

2-94 

3-oo 

3-o6 

3-n 

3-17 

3.22 

3-28 

36 

2.22 

2.28 

2-33 

2-39 

2.44 

2.50 

2.56 

2.61 

2.67 

2.72 

+35 

+   1.67 

+  1-72 

+  1.78 

+  1.83 

+  1.89 

+  1-94 

+  2.OO 

+  2.06 

+   2.II 

+  2.17 

34 

+   I.II 

+  1.17 

+   1.22 

+  1.28 

+  L33 

+  1-39 

+  1-44 

+  1-50 

+    1.56 

+  1.61 

33 

+  0.56 

+  0.61 

+  0.67 

+  0.72 

+  0.78 

+  0.83 

+  0.89 

+  0.94 

-f   1.  00 

+  1.06 

32 

0.00 

+  0.06 

+  O.II 

+  0.17 

+  0.22 

+  0.28 

+  0.33 

+  o-39 

+  0.44 

+  0.50 

3i 

—  0.56 

—  0.50 

-0.44 

-0.39 

-  0.33 

—  0.28 

—  0.22 

-  0.17 

—  O.II 

—  0.06 

+30 

—  I.II 

-  1.06 

—   1.  00 

-  0.94 

—  0.89 

-  0.83 

—  0.78 

-  0.72 

—  0.67 

--  0.61 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

SMITHSONIAN  TABLES. 


TABLE  2, 


FAHRENHEIT   SCALE   TO    CENTIGRADE. 


Fahren- 
heit. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

+30° 

-  i?n 

-  i?o6 

-    I?00 

-o?94 

-  o?89 

-o?83 

-  o?78 

-0?72 

-  o?67 

-  o?6i 

29 

1.67 

1.61 

1.56 

1.50 

1.44 

i.39 

1-33 

1.28 

1.22 

1.17 

28 

2.22 

2.17 

2.  II 

2.06 

2.OO 

1.94 

1.89 

1.83 

1.78 

1.72 

27 

2.78 

2.72 

2.67 

2.61 

2.56 

2.50 

2.44 

2-39 

2-33 

2.28 

26 

3-33 

3-28 

3.22 

3.17 

3-II 

3.06 

3.00 

2-94 

2.89 

2.83 

+25 

-3-89 

-3.83 

-3.78 

-3-72 

-3.67 

-3.61 

-3.56 

-3.50 

-   3.44 

-  3-39 

24 

4.44 

4-39 

4-33 

4.28 

4.22 

4.17 

4.11 

4.06 

4.00 

3-94 

23 

5-00 

4-94 

4.89 

4-83 

4.78 

4.72 

4.67 

4.6l 

4.56 

4.50 

22 

5.56 

5.50 

5-44 

5-39 

5-33 

5.28 

5-22 

5.17 

5-II 

5.06 

21 

6.ii 

6.06 

6.00 

5-94 

5.89 

5.83 

5.78 

5.72 

5.67 

5.61 

+20 

-  6.67 

-  6.61 

-  6.56 

—  6.50 

-  6.44 

-  6.39 

-6.33 

-   6.28 

—   6.22 

-6.17 

19 

7.22 

7.17 

7.11 

7.06 

7.00 

6.94 

6.89 

6.83 

6.78 

6.72 

18 

7.78 

7.72 

7.67 

7.61 

7-56 

7.5o 

7-44 

7.39 

7-33 

7.28 

17 

8-33 

8.28 

8.22 

8.17 

8.ii 

8.06 

8.00 

7.94 

7.89 

7.83 

16 

8.89 

8.83 

8.78 

8.72 

8.67 

8.61 

8.56 

8.50 

8.44 

8-39 

+  15 

-  9.44 

-  9-39 

-  9-33 

-  9.28 

-  9.22 

-  9.17 

-  9.11 

—  9.06 

—  9.00 

-8.94 

14 

10.00 

9-94 

9.89 

9-83 

9.78 

9-72 

9.67 

9.6l 

9.56 

9.50 

*3 

10.56 

10.50 

10.44 

10.39 

10.33 

10.28 

10.22 

10.17 

10.  1  1 

10.06 

12 

II.  II 

1  1.  06 

11.00 

10.94 

10.89 

10.83 

10.78 

IO.72 

10.67 

10.61 

II 

11.67 

11.  61 

11.56 

11.50 

11.44 

11-39 

11-33 

11.28 

11.22 

11.17 

+  10 

—12.22 

-12.17 

—I2.II 

—12.06 

—12.00 

-11.94 

—11.89 

-11.83 

-11.78 

-11.72 

12.78 

12.72 

12.67 

12.  6l 

12.56 

12.50 

12.44 

12.39 

12.33 

12.28 

8 

13-33 

13.28 

13.22 

I3-I7 

13.11 

13.06 

13.00 

12.94 

12.89 

12.83 

7 

13.89 

13-83 

13.78 

13-7^ 

13.67 

13.61 

13-56 

13.50 

13.44 

13.39 

6 

14.44 

14.39 

14.33 

14.28 

14.22 

14.17 

14.11 

14.06 

14.00 

*  13.94 

+   5 

—15.00 

-14.94 

-14.89 

-14.83 

-14.78 

-14.72 

-14.67 

—I4.6l 

-14.56 

-14.50 

4 

15.56 

15.50 

15.44 

15.39 

15.33 

15.28 

15.22 

15.17 

IS-  *  I 

15.06 

3 

16.11 

16.06 

16.00 

15-94 

15.89 

15.83 

15-78 

I5.72 

16-67 

15.61 

2 

16.67 

16.61 

16.56 

16.50 

16.44 

16.39 

16.33 

16.28 

16.22 

16.17 

I 

17.22 

17.17 

17.11 

17.06 

I7.OO 

16.94 

16.89 

16.83 

16.78 

16.72 

+  o 

17.78 

17.72 

17.67 

17.61 

17.56 

17-50 

17.44 

17.39 

17-33 

17.28 

-  0 

-17.78 

-17-83 

-17.89 

-17.94 

-18.00 

-18.06 

—  18.11 

—l8.I7 

—18.22 

-18.28 

I 

18.33 

18-39 

18.44 

18.50 

18.56 

18.61 

18.67 

18.72 

18.78 

18.83 

2 

18.89 

18.94 

19.00 

19.06 

19.11 

19.17 

19.22 

19.28 

19.33 

19-39 

3 

19.44 

19-50 

19-56 

19.61 

19.67 

19.72 

19.78 

19.83 

19.89 

19.94 

4 

20.00 

20.06 

20.11 

20.17 

2O.22 

20.28 

20.33 

20.39 

20.44 

20.50 

-    5 

—20.56 

—20.61 

—20.67 

—20.72 

—20.78 

-20.83 

—20.89 

—20.94 

—21.00 

—21.06 

6 

21.  II 

21.17 

21.22 

21.28 

21-33 

21.39 

21.44 

21.50 

21.56 

21.  6l 

7 

21.67 

21.72 

21.78 

21.83 

21.89 

21.94 

22.00 

22.06 

22.11 

22.17 

8 

22.22 

22.28 

22.33 

22.39 

22.44 

22.50 

22.56 

22.  6l 

22.67 

22.72 

9 

22.78 

22.83 

22.89 

22.94 

23.00 

23.06 

23.11 

23.17 

23.22 

23.28 

-10 

-23-33 

-23.39 

-23.44 

-23.50 

-23.56 

-23.61 

-23.67 

-23.72 

-23.78 

-23.83 

ii 

23.89 

23.94 

24.00 

24.06 

24.11 

24.17 

24.22 

24.28 

24-33 

24.39 

12 

24.44 

24.50 

24.56 

24.61 

24.67 

24.72 

24.78 

24.83 

24.89 

24.94 

13 

25.00 

25.06 

25.11 

25-17 

25.22 

25.28 

25.33 

25.39 

25-44 

25.50 

14 

25.56 

25.61 

25.67 

25.72 

25.78 

25.83 

25.89 

25.94 

26.00 

26.06 

-  15 

—26.11 

—26.17 

—26.22 

-26.28 

-26.33 

-26.39 

-26.44 

—26.50 

-26.56 

-26.61 

16 

26.67 

26.72 

26.78 

26.83 

26.89 

26.94 

27.00 

27.06 

27.11 

27.17 

17 

27.22 

27.28 

27-33 

27.39 

27.44 

27.50 

27.56 

27.6l 

27.67 

27.72 

18 

27.78 

27.83 

27.89 

27.94 

28.00 

28.06 

28.11 

•28.17 

28.22 

28.28 

19 

28.33 

28.39 

28.44 

28.50 

28.56 

28.61 

28.67 

'   28.72 

28.78 

28.83 

-20 

—28.89 

-28.94 

—29.00 

—29.06 

—29.11 

-29.17 

—29.22 

-•29.28 

-29-33 

-29.39 

.0 

.1 

.2 

.3 

.4 

.5 

-.6 

.7 

.8 

.9 

SMITHSONIAN  TABLES. 


TABLE  2. 


FAHRENHEIT   SCALE   TO    CENTIGRADE. 


Fahren- 
heit. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

-20° 

-28?39 

-28?94 

-29?00 

29?o6 

—29?!  i 

—  2Q?I7 

—  29?22 

-29?28 

-29-33 

-29°39 

21 

29.44 

29.50 

29.56 

29.61 

29.67 

29.72 

29.78 

29.83 

29.89 

29.94 

22 

30.00 

30.06 

30.11 

30.17 

30.22 

30.28 

30.33 

30.39 

30.44 

30.50 

23 

30.56 

30.61 

30.67 

30.72 

30.78 

30.83 

30.89 

30.94 

31.00 

31.06 

24 

31-11 

3i.i7 

31.22 

31-28 

31.33 

3r-39 

3J-44 

31.50 

31.56 

31.61 

-25 

-31.67 

-31.72 

-31.78 

-31.83 

31.89 

-  3L94 

—32.00 

—32.06 

-32.11 

-32.17 

26 

32.22 

32.28 

32.33 

32.39 

32.44 

32.50 

32.56 

32.61 

32.67 

32.72 

27 

32.78 

32.83 

32.89 

32.94 

33-oo 

33-o6 

33.ii 

33.17 

33-22 

33-28 

28 

33-33 

33-39 

33-44 

33-50 

33.56 

33-6i 

33.67 

33.72 

33.78 

33.83 

29 

33.89 

33-94 

34.00 

34.o6 

34.ii 

34.17 

34.22 

34.28 

34-33 

34-39 

-30 

-34-44 

-34-50 

-34.56 

-34.6i 

-34.67 

-34.72 

-34.78 

-34.83 

-34-89 

-34-94 

3i 

35.oo 

35-06 

35.ii 

35.17 

35-22 

35.28 

35-33 

35-39 

35-44 

35-50 

32 

35.56 

35.6i 

35.67 

35.72 

35.78 

35.83 

35-89 

35-94 

36.00 

36.06 

33 

36.11 

36.17 

36.22 

36.28 

36.33 

36.39 

36.44 

36.50 

36.56 

36.61 

34 

36.67 

36.72 

36.78 

36.83 

36.89 

36.94 

37-00 

37.o6 

37-11 

37.17 

-35 

-37-22 

-37.28 

-37-33 

-37-39 

-37-44 

-37-50 

-37.56 

-37.6i 

-37.67 

-37.72 

36 

37.78 

37.83 

37.89 

37.94 

38.00 

38.06 

38.11 

38.17 

38.22 

38.28 

37 

38.33 

38.39 

38.44 

38.50 

38.56 

38.61 

38-67 

38.72 

38.78 

38.83 

38 

38.89 

38.94 

39.00 

39-o6 

39-11 

39-17 

39-22 

39.28 

39-33 

39-39 

39 

39-44 

39.50 

39-56 

39.61 

39.67 

39.72 

39.78 

39-83 

39.89 

39-94 

-40 

—40.00 

—40.06 

—40.11 

-40.17 

—40.22 

—40.28 

-40.33 

-40.39 

-40.44 

-40.50 

41 

40.56 

40.61 

40.67 

40.72 

40.78 

40.83 

40.89 

40.94 

41.00 

41.06 

42 

41.11 

41.17 

41.22 

41.28 

•   41-33 

41.39 

41.44 

41.50 

41.56 

41.61 

43 

41.67 

41.72 

41.78 

41.83 

41.89 

41.94 

42.00 

42.06 

42.11 

42.17 

44 

42.22 

42.28 

42.33 

42.39 

42.44 

42.50 

42.56 

42.61 

42.67 

42.72 

-45 

-42.78 

-42.83 

-42.89 

-42.94 

-43.00 

-43.06 

-43.il 

-43.17 

-43-22 

-43.28 

46 

43.33 

43-39 

43-44 

43-50 

43.56 

43.61 

43.67 

43-72 

43.78 

43.83 

47 

43.89 

43-94 

44.00 

44.06 

44.11 

44.17 

44.22 

44.28 

44-33 

44-39 

48 

4*.  44 

44,50 

44.56 

44.61 

44.67 

44.72 

44.78 

44-83 

44.89 

44-94 

49 

45.00 

45-o6 

45-11 

45.17 

45.22 

45.28 

45-33 

45.39 

45-44 

45.50 

-50 

-45.56 

-45.6i 

-45.67 

-45.72 

-45.78 

-45.83 

-45.89 

-45-94 

—46.00 

—46.06 

5i 

46.11 

46.17 

46.22 

46.28 

46.33 

46.39 

46.44 

46.50 

46.56 

46.61 

52 

46.67 

46.72 

46.78 

46.83 

46.89 

46.94 

47.00 

47.06 

47.11 

47.17 

53 

47.22 

47.28 

47-33 

47.39 

47.44 

47.50 

47.56 

47.61 

47.67 

47.72 

54 

47.78 

47.83 

47.89 

47-94 

48.00 

48.06 

48.11 

48.17 

48.22 

48.28 

-55 

-48.33 

-48.39 

-48.44 

-48.50 

-48.56 

—48.61 

-48.67 

-48.72 

-48.78 

-48.83 

56 

48.89 

48.94 

49.00 

49.06 

49.11 

49-17 

49.22 

49.28 

49-33 

49-39 

57 

49-44 

49-50 

49-56 

49.61 

49.67 

49-72 

49-78 

49-83 

49.89 

49-94 

58 

50.00 

50.06 

50.11 

50.17 

50.22 

50.28 

50.33 

50.39 

50.44 

50.50 

59 

50.56 

50.61 

50.67 

50.72 

50.78 

50.83 

50.89 

50.94 

51.00 

51.06 

-60 

-51.11 

-5LI7 

-51.22 

-51.28 

-51.33 

-5L39 

-51.44 

-51-50 

-5L56 

—51.61 

6r 

51.67 

51-72 

51.78 

51.83 

51.89 

5L94 

52.00 

52.06 

52.11 

52.17 

62 

52.22 

52.28 

52.33 

52.39 

52.44 

52.50 

52.56 

52.61 

52.67 

52.72 

63 

52.78 

52.83 

52.89 

52.94 

53.00 

53.o6 

53-11 

53.17 

53-22 

53-28 

64 

53-33 

53-39 

53.44 

53.50 

53.56 

53.6i 

53.67 

53.72 

53.78 

53.83 

-65 

-53.89 

-53-94 

-54-00 

-54-06 

-54-11 

-54.17 

-54.22 

-54.28 

-54-33 

-54.39 

66 

54.44 

54-50 

54.56 

54.61 

54.67 

54-72 

54.78 

54.83 

54.89 

54-94 

67 

55-oo 

55.o6 

55-11 

55.17 

55-22 

55.28 

55-33 

55-39 

55-44 

55.50 

68 

55.56 

55-6i 

55-67 

55.72 

55.78 

55.83 

55.89 

55-94 

56.00 

56.06 

69 

56.11 

56.17 

56.22 

56.28 

56.33 

56.39 

56.44 

56.50 

56.56 

56.61 

-70 

-56.67 

-56.72 

-56.78 

-56.83 

-56.89 

-56.94 

-57.00 

-57-06 

-57.il 

-57.17 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

SMITHSONIAN  TABLES. 


TABLE  3. 


CENTIGRADE    SCALE   TO    FAHRENHEIT. 


Centi- 
grade. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

F 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

+50° 

+I22?00 

+  I22?l8 

+I22?36 

+I22?54 

+I22?72 

+I22?90 

+I23?08 

+I23?26 

+i23?44 

+I23?62 

49 

120.20 

120.38 

120.56 

120.74 

I2O.92 

121.  10 

121.28 

121.46 

121.64 

121.82 

48 

II8.40 

118.58 

II8.76 

118.94 

119.12 

119.30 

119.48 

119.66 

119.84 

120.02 

47 

116.60 

II6.78 

116.96 

117.14 

117.32 

117.50 

117.68 

117.86 

118.04 

118.22 

46 

114.80 

114.98 

II5.I6 

115.34 

H5.52 

115.70 

115.88 

116.06 

116.24 

II6.42 

+45 

+113.00 

+113.18 

+H3.36 

+113-54 

+113.72 

+113.90 

+114.08 

+114.26 

+114.44 

+114.62 

44 

in.  20 

111.38 

111.56 

111.74 

111.92 

112.  10 

112.28 

112.46 

112.64 

112.82 

43 

109.40 

109.58 

109.76 

109.94 

110.12 

110.30 

110.48 

110.66 

110.84 

1  1  1.  02 

42 

107.60 

107.78 

107.96 

108.14 

108.32 

108.50 

108.68 

108.86 

109.04 

109.22 

4i 

105.80 

105.98 

106.16 

106.34 

106.52 

106.70 

106.88 

107.06 

107.24 

10742 

+40 

+104.00 

+I04.I8 

+104.36 

+104.54 

+104.72 

+104.90 

+105.08 

+105.26 

+105.44 

+105.62 

39 

102.20 

102.38 

102.56 

102.74 

IO2.92 

103.10 

103.28 

103.46 

103.64 

103.82 

38 

100.40 

100.58 

100.76 

100.94 

101.12 

101.30 

101.48 

101.66 

101.84 

102.02 

37 

98.60 

98.78 

98.96 

99.14 

99-32 

99-50 

99.68 

99.86 

100.04 

100.22 

36 

96.80 

96.98 

97.16 

97-34 

97.52 

97.70 

97.88 

98.06 

98.24 

98.42 

+35 

+  95-00 

+  95.18 

+  95.36 

+  95-54 

+  95-72 

+  95.90 

+  96.08 

+  96.26 

+  96-44 

+  96.62 

34 

93.20 

93.38 

93-56 

93-74 

93-92 

94.10 

94.28 

9446 

94.64 

94.82 

33 

91.40 

91.58 

§•76 

91.94 

92.12 

92.30 

92.48 

92.66 

92.84 

93-02 

32 

89.60 

89.78 

.96 

90.14 

90.32 

90.50 

90.68 

90.86 

91.04 

91.22 

3i 

87.80 

87.98 

.16 

88.34 

88.52 

88.70 

88.88 

89.06 

89.24 

89.42 

+30 

+  86.00 

+  86.18 

+  86.36 

+  86.54 

+  86.72 

+  86.90 

+  87.08 

+  87.26 

+  8744 

+87.62 

29 

84.20 

84.38 

84-56 

84.74 

84.92 

85.10 

85.28 

85.46 

85.64 

85.82 

28 

82.40 

82.58 

82.76 

82.94 

83.12 

83.30 

83.48 

83.66 

83.84 

84.02 

27 

80.60 

80.78 

80.96 

81.14 

81.32 

81.50 

81.68 

81.86 

82.04 

82.22 

26 

78.80 

78.98 

79.16 

79-34 

79-52 

79.70 

79-88 

80.06 

80.24 

80.42 

+25 

+  77.00 

+  77-I8 

+  77.36 

+  77-54 

+  77-72 

+  77.90 

+  78.08 

+  78.26 

+  78.44 

+  78.62 

24 

75-20 

75.38 

75.56 

75-74 

75-92 

76.10 

76.28 

76.46 

76.64 

76.82 

23 

73-40 

73-58 

73.76 

73-94 

74.12 

74.30 

74.48 

74-66 

74.84 

75-02 

22 

71.60 

71.78 

71.96 

72.14 

72.32 

72.50 

72.68 

72.86 

73-04 

73-22 

21 

69.80 

69.98 

70.16 

70.34 

70.52 

70.70 

70.88 

71.06 

71.24 

71.42 

+20 

+  68.00 

+  68.18 

+  68.36 

+  68.54 

+  68.72 

+  68.90 

+  69.08 

+  69.26 

+  69.44 

+69.62 

19 

66.20 

66.38 

66.56 

66.74 

66.92 

67.10 

67.28 

67.46 

67.64 

67.82 

18 

64.40 

64.58 

64.76 

64.94 

65.12 

65.30 

65.48 

65.66 

65.84 

66.02 

17 

62.60 

62.78 

62.96 

63.14 

63.32 

63.50 

63.68 

63.86 

64.04 

64.22 

16 

60.80 

60.98 

61.16 

61.34 

61.52 

61.70 

61.88 

62.06 

62.24 

62.42 

+  15 

+  59-0° 

+  59.18 

+  59-36 

+  59-54 

+  59-72 

+  59-9° 

+  60.08 

+  60.26 

+  60.44 

+  60.62 

14 

57-20 

57.38 

57.56 

57-74 

57.92 

58.10 

58.28 

58.46 

58.64 

58.82 

13 

55-40 

55.58 

55.76 

55-94 

56.12 

56.30 

56.48 

56.66 

56.84 

57-02 

12 

53-6o 

53.78 

53.96 

54-14 

54.32 

54-50 

54-68 

54-86 

55-04 

55-22 

II 

51.80 

5L98 

52.16 

52.34 

52.52 

52.70 

52.88 

53-o6 

53-24 

53-42 

+  10 

+  50.00 

+  50.I8 

+  50.36 

+  50.54 

+  50.72 

+  50.90 

+  51.08 

+  51-26 

+  51-44 

+  51-62 

9 

48.20 

48.38 

48.56 

48.74 

48.92 

49.10 

49.28 

49.46 

49-64 

49.82 

8 

46.40 

46.58 

46.76 

46.94 

47.12 

47.30 

47.48 

47-66 

47.84 

48.02 

7 

44.60 

44.78 

44-96 

45-14 

45-32 

45.50 

45-68 

45.86 

46.04 

46.22 

6 

42.80 

42.98 

43.16 

43-34 

43.52 

43-70 

43-88 

44.06 

44-24 

44-42 

+  5 

+  41.00 

+  4LI8 

+  41-36 

+  41-54 

+  41.72 

+  41.90 

+  42.08 

+  42.26 

+  42.44 

+  42.62 

4 

39-20 

39.38 

39.56 

39-74 

39.92 

40.10 

40.28 

40.46 

40.64 

40.82 

3 

37-40 

37.58 

37.76 

37-94 

38.12 

38.30 

38-48 

38.66 

38.84 

39.02 

2 

35-6o 

35.78 

35.96 

36.14 

36.32 

36.50 

36.68 

36.86 

37-04 

37.22 

I 

33.8o 

33.98 

34.16 

34-34 

34-52 

34-70 

34-88 

35-o6 

35-24 

35-42 

+  0 

+  32.00 

+  32.I8 

+  32-36 

+  32-54 

+  32.72 

+  32.90 

+  33.o8 

+  33-26 

+  33-44 

+  33-62 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

SMITHSONIAN  TABLES. 


TABLE   3. 


CENTIGRADE    SCALE    TO    FAHRENHEIT. 


Centi- 
grade. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

-0° 

+32?oo 

+3I-82 

+3I°64 

+3i°46 

+3I°28 

+31-10 

+30^92 

+30?74 

+3o?56 

+30?38 

i 

30.20 

30.02 

29.84 

29.66 

29.48 

29.30 

29.12 

28.94 

28.76 

28.58 

2 

28.40 

28.22 

28.04 

27.86 

27.68 

27.50 

27.32 

27.14 

26.96 

26.78 

3 

26.60 

26.42 

26.24 

26.06 

25.88 

25.70 

25-52 

25.34 

25.16 

24.98 

4 

24.80 

24.62 

24.44 

24.26 

24.08 

23.90 

23.72 

23.54 

23.36 

23.18 

-  5 

+23.00 

+22.82 

+22.64 

+22.46 

+22.28 

+22.10 

+21.92 

+21.74 

+21.56 

+21.38 

6 

21.  2O 

21.  02 

20.84 

20.66' 

20.48 

20.30 

20.12 

19.94 

19.76 

I9-53 

7 

19.40 

19.22 

19.04 

18.86 

18.68 

18.50 

18.32 

18.14 

17.96 

17.78 

8 

17.60 

17.42 

17.24 

17.06 

16.88 

16.70 

16.52 

16.34 

16.16 

15.98 

9 

15.80 

15.62 

15.44 

15.26 

15.08 

14.90 

14.72 

14.54 

14.36 

14.18 

-10 

+14.00 

+13.82 

+13.64 

+1346 

+13.28 

+13.10 

+12.92 

+12.74 

+12.56 

+12.38 

ii 

12.20 

12.02 

11.84 

11.66 

11.48 

11.30 

II.  12 

10.94 

10.76 

10.58 

12 

10.40 

10.22 

10.04 

9.86 

9.68 

9.50 

9.32 

9.14 

8.96 

8.78 

13 

8.60 

8.42 

8.24 

8.06 

7.88 

7.70 

7.52 

7-34 

7.16 

6.98 

14 

6.80 

6.62 

6.44 

6.26 

6.08 

5-90 

5.72 

5-54 

5.36 

5.i8 

-15 

+  5-00 

+  4.82 

+  4.64 

+  4-46 

+  4-28 

+  4.10 

+  3-92 

+  3-74 

+  3.56 

+  3.38 

16 

+  3-20 

+  3-02 

+  2.84 

+  2.66 

+  2.48 

+  2.30 

+  2.12 

+  L94 

+  1.76 

+  1.58 

17 

+  1.40 

+    1.22 

+  1.04 

+  0.86 

+  0.68 

+  0.50 

+  0.32 

+  0.14 

—  0.04 

—  0.22 

18 

—  0.40 

-  0.58 

—  0.76 

—  0.94 

—    1.  12 

-  1.30 

-   1.48 

-  1.66 

—  1.84 

—    2.02 

19 

—   2.20 

-2.38 

-2.56 

-  2.74 

-   2.92 

-  3.10 

-3.28 

-  346 

-  3.64 

-3-82 

-20 

—   4.OO 

-   4.18 

-  4.36 

-  4-54 

-  4-72 

-  4-90 

-5-08 

-5.26 

-  544 

-   5.62 

21 

5-80 

5.98 

6.16 

6-34 

6.52 

6.70 

6.88 

7.06 

7.24 

7.42 

22 

7.60 

7.78 

7.96 

8.14 

8-32 

8.50 

8.68 

8.86 

9.04 

9.22 

23 

9.40 

9.58 

9.76 

9-94 

10.12 

10.30 

10.48 

10.66 

10.84 

11.02 

24 

11.20 

11.38 

11.56 

11.74 

11.92 

12.  IO 

12.28 

12.46 

12.64 

12.82 

-25 

-13.00 

-I3.I8 

-13.36 

-13-54 

-13.72 

-13.90 

—14.08 

-14.26 

—14.44 

—14.62 

26 

14.80 

14.98 

15.16 

15.34 

15.52 

15.70 

15-88 

16.06 

16.24 

16.42 

27 

1  6.  60 

16.78 

16.96 

17.14 

17.32 

17.50 

17.68 

17.86 

18.04 

18.22 

28 

18.40 

18.58 

18.76 

18.94 

19.12 

19.30 

19.48 

19.66 

19.84 

20.02 

29 

20.20 

20.38 

20.56 

20.74 

20.92 

21.  IO 

21.28 

21.46 

21.64 

21.82 

-30 

—22.OO 

—22.18 

-22.36 

-22.54 

-22.72 

—22.90 

—23.08 

—23.26 

-23.44 

—23.62 

3i 

23.80 

23.98 

24.16 

24.34 

24.52 

24.70 

24.88 

25.06 

25.24 

25.42 

32 

25.60 

25.78 

25.96 

26.14 

26.32 

26.50 

26.68 

26.86 

27.04 

27.22 

33 

27.40 

27.58 

27.76 

27.94 

28.12 

28.30 

28.48 

28.66 

28.84 

29.O2 

34 

29.20 

29.38 

29.56 

29.74 

29.92 

30.10 

30.28 

30.46 

30.64 

30.82 

-35 

—31.00 

-3I.I8 

-31.36 

-3I-54 

-31.72 

-31.90 

-32.08 

—32.26 

-32.44 

—32.62 

36 

32.80 

32.98 

33-  16 

33-34 

33-52 

33.70 

33-88 

34.06 

34.24 

34-42 

37 

34.60 

34.78 

34.96 

35-14 

35.32 

35.50 

35-68 

35-86 

36.04 

36.22 

38 

36.40 

36.58 

36.76 

36.94 

37.12 

37-30 

37-48 

37-66 

37.84 

38.02 

39 

38.20 

38.38 

38.56 

38.74 

38.92 

39.10 

39-28 

39-46 

39.64 

39-82 

-40 

—40.00 

—40.l8 

-40.36 

-40.54 

-40.72 

-40.90 

—41.08 

—41.26 

-41.44 

—41.62 

41 

41.80 

41.98 

42.16 

42.34 

42.52 

42.70 

42.88 

43.06 

43-24 

43-42 

42 

43.60 

43.78 

43.96 

44.14 

44.32 

44.50 

44-68 

44.86 

45.04 

45-22 

43 

45-40 

45.58 

45.76 

45-94 

46.12 

46.30 

46.48 

46.66 

46.84 

47-02 

44 

47.20 

47.38 

47.56 

47-74 

47.92 

48.10 

48.28 

48.46 

48.64 

48.82 

-45 

-49.00 

-49.18 

-49.36 

-49.54 

-49-72 

-49.90 

-50.08 

—50.26 

-50.44 

—50.62 

46 

50.80 

50.98 

51.16 

51-34 

51-52 

5L70 

51.88 

52.06 

52.24 

52.42 

47 

52.60 

52.78 

52.96 

53-14 

53.32 

53-50 

53.68 

53-86 

54.04 

54-22 

48 

54-40 

54.58 

54.76 

54.94 

55.12 

55-3° 

55-48 

55-66 

55-84 

56.02 

49 

56.20 

56.38 

56.56 

56.74 

56.92 

57-10 

57-28 

57.46 

57.64 

57.82 

-50 

-58.00 

-58.18 

-58.36 

-58.54 

-58.72 

-58.90 

-59-08 

-59.26 

-59-44 

-59.62 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

SMITHSONIAN  TABLES. 


TABLE    4. 
CENTIGRADE    SCALE   TO    FAHRENHEIT- Near  the   Boiling    Point. 


Centi- 
grade. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

100° 

2I2?OO 

2I2?l8 

2I2?36 

2I2?54 

2I2?72 

2I2?90 

2i3?o8 

2I3?26 

2i3?44 

2I3?62 

99 

210.20 

210.38 

210.56 

210.74 

210.92 

211.  IO 

211.28 

211.46 

211.64 

211.82 

98 

208.40 

208.58 

208.76. 

208.94 

2O9.I2 

209.30 

209.48 

209.66 

209.84 

210.02 

97 

2O6.6O 

206.78 

206.96 

207.14 

207.32 

207.50 

207.68 

207.86 

208.04 

208.22 

96 

204.80 

204.98 

205.16 

205.34 

205.52 

205.70 

205.88 

2O6.O6 

206.24 

2O6.42 

95 

2O3.OO 

203.18 

203.36 

203.54 

203.72 

203.90 

204.08 

2O4.26 

204.44 

2O4.62 

94 

201.20 

201.38 

201.56 

201.74 

201.92 

202.10 

202.28 

2O2.46 

202.64 

2O2.82 

93 

199.40 

199.58 

199.76 

199.94 

200.12 

2OO.3O 

200.48 

200.66 

200.84 

201.02 

92 

197.60 

197.78 

197.96 

198.14 

198.32 

198.50 

198.68 

198.86 

199.04 

199.22 

91 

195.80 

I95-98 

196.16 

196.34 

196.52 

196.70 

196.88 

197.06 

197.24 

19742 

90 

194.00 

I94.I8 

194.36 

194.54 

194.72 

194.90 

195-08 

195.26 

195.44 

195.62 

TABLE    5. 
DIFFERENCES    FAHRENHEIT   TO    DIFFERENCES    CENTIGRADE. 


Fahren- 
heit. 

.0 

.1 

.2 

.3 

.4 

.5 

.Q 

.7 

.8      !      .9 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

0° 

0?00 

o?o6 

0?II 

o?i7 

.  0?22 

0?28 

o?33 

o?39 

o?44 

o?5o 

i 

0.56 

0.61 

0.67 

0.72 

0.78 

0.83 

0.89 

0-94 

I.OO 

i.  06 

2 

I.  II 

1.17 

1.22 

1.28 

I«33 

i-39 

1.44 

1.50 

1.56 

1.61 

3 

.1.67 

1.72 

1.78 

1.83 

1.89 

1.94 

2.OO 

2.06 

2.  II 

2.17 

4 

2.22 

2.28 

2-33 

2-39 

2-44 

2.50 

2.56 

2.61 

2.67 

2.72 

5 

2.78 

2.83 

2.89 

2.94 

3.00 

3-o6 

3-H 

3.17 

3.22 

3-28 

6 

3-33 

3-39 

3-44 

3.50 

3.56 

3-6i 

3.67 

3.72 

3.78 

3-83 

7 

3-89 

3-94 

4.00 

4.06 

4.II 

4.17 

4.22 

4.28 

4-33 

4-39 

8 

4.44 

4.50 

4.56 

4.61 

4.67 

4-72 

4.78 

4.83 

4.89 

4-94 

9 

5.00 

5.06 

5-" 

5.17 

5-22 

5-28 

5-33 

5-39 

5-44 

5.50 

10 

5.56 

5-6i 

5.67 

5.72 

5-78 

5-83 

5-89 

5.94 

6.00 

6.06 

ii 

6.11 

6.17 

6.22 

6.28 

6.33 

6.39 

6-44 

6.50 

6.56 

6.61 

12 

6.67 

6.72 

6.78 

6.83 

6.89 

6.94 

7.00 

7.06 

7.11 

7.17 

*3 

7.22 

7.28 

7-33 

7-39 

7.44 

7-50 

7.56 

7.61 

7-67 

7-72 

14 

7-78 

7.83 

7.89 

7-94 

8.00 

8.06 

8.ii 

8.17 

8.22 

8.28 

15 

8.33 

8-39 

8.44 

8.50 

8.56 

8.61 

8.67 

8.72 

8.78 

8.83 

16 

8.89 

8-94 

9.00 

9.06 

9.11 

9.17 

9.22 

9.28 

9-33 

9-39 

17 

9-44 

9-50 

9-56 

9.61 

9.67 

9.72 

9.78 

9.83 

9.89 

9-94 

18 

10.00 

10.06 

10.  1  1 

10.17 

10.22 

10.28 

10.33 

10.39 

10.44 

10.50 

19 

10.56 

10.  6  1 

10.67 

10.72 

10.78 

10.83 

10.89 

10.94 

11.00 

1  1.  06 

20 

ii.  ii 

11.17 

11.22 

11.28 

n-33 

11-39 

11.44 

11.50 

11.56 

ii.  61 

TABLE   6, 
DIFFERENCES    CENTIGRADE   TO    DIFFERENCES    FAHRENHEIT. 


Centi- 
grade. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

0° 

0?00 

o?i8 

o?36 

o?54 

0?72 

o?90 

i?o8 

I?26 

i?44 

I?62 

i 

1.  80 

1.98 

2.16 

2-34 

2.52 

2.70 

2.88 

3-06 

3-24 

3-42 

2 

3.60 

3.78 

3.96 

4.14 

4.32 

4-50 

4.68 

4.86 

5-04 

5-22 

3 

5-40 

5.58 

5.76 

5-94 

6.12 

6.30 

6.48 

6.66 

6.84 

7.02 

4 

7.20 

7.38 

7.56 

7-74 

7.92 

8.10 

8.28 

8.46 

8.64 

8.82 

5 

9.00 

9.18 

9-36 

9-54 

9.72 

9.90 

10.08 

10.26 

10.44 

10.62 

6 

10.80 

10.98 

ii.  16 

H.34 

11.52 

11.70 

11.88 

12.06 

12.24 

12.42 

7 

1  2.  60 

12.78 

12.96 

13-14 

13-32 

13-50 

13.68 

13-86 

14.04 

14.22 

8 

14.40 

14.58 

14.76 

14.94 

15.12 

15-30 

15.48 

15-66 

15.84 

1  6.  02 

9 

16.20 

16.38 

16.56 

16.74 

16.92 

17.10 

17.28 

17.46 

17.64 

17.82 

SMITHSONIAN  TABLE?. 


TABLE  7. 


REDUCTION    OF  TEMPERATURE    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 


Rate  of 

DIFFERENCES  BETWEEN  TEE  TEMPERATURE  AT  ANY  ALTITUDE 

decrease 

AND  AT  SEA  I,EVEI,. 

of 

ature. 

ALTITUDE  IN  FEET. 

for 

i 

every 

100 

200 

300 

400 

500 

600 

700 

800 

900 

1000  2000 

3000 

4000 

5000 

Feet 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F.    i        F. 

F. 

F. 

F. 

200 

o?so 

I?00 

i?5o 

2?00 

3°.oo 

4?oo 

5?oo  !  io?oo 

i5?oo 

20?00 

25?00 

205 

0.49 

0.98 

1.46 

1.95 

2.44 

2-93 

3.41 

3.9° 

4-39 

4-88     9-76 

14.63 

I9-5I 

24-39 

210 

0.48 

0.95 

i.43 

1.90 

2.38 

2.86 

3-33 

3.81 

4.29 

4.76 

9-52 

14.29 

19.05 

23.81 

215 

0.47 

0.93 

1.40 

1.86 

2.33 

2.79 

3.26 

3.72 

4.19 

4.65 

9-30 

13.95 

18.60 

23.26 

22O 

0-45 

0.91 

1.36 

1.82 

2.27 

2-73 

3-18 

3.64 

4.09 

4.55 

9.09 

13.63 

18.18 

22.72 

230 

0-43 

0.87 

1.30 

1.74 

2.17 

2.61 

3-04 

3.48 

3.91 

4-35 

8.70 

13.04 

17.39 

21.74 

240 

0.42 

0.83 

1.25 

1.67 

2.08 

2.50 

2.92 

3-33 

3-75 

4.17 

8-33 

12.50 

16.67 

20.83 

250 

0.40 

0.80 

1.20 

1.60 

2.00 

2.40 

2.80 

3.20 

3-6o 

4.00 

8.00 

12.  OO 

16.00 

20.00 

260 

0.38 

0.77 

I-I5 

1-54 

1.92 

2.31 

2.69 

3.08 

346 

3.85 

7.69 

H.54 

15.38 

19.23 

270 

0-37 

0.74 

I.  II 

1.48 

1.85 

2.22 

2-59 

2.96 

3-33 

3.70 

7.41 

II.  II 

14.81 

18.52 

280 

0.36 

0.71 

1.07 

1-43 

1.79 

2.14 

2.50 

2.86 

3.21 

3-57 

7.14 

10.71 

14.29 

17.86 

290 

o.34 

0.69 

1.03 

1.38 

1-73 

2.07 

2.41 

2.76 

3.10 

345 

6.90 

10.34 

13.79 

17.24 

300 

0-33 

0.67 

I.OO 

i.33 

1.67 

2.00 

2.33 

2.67 

3.00 

3-33 

6.67 

IO.OO 

13.33 

16.67 

310 

0.32 

0.65 

0.97 

1.29 

1.61 

1.94 

2.26 

2.58 

2.90 

3-23 

6-45 

9.68 

12.90 

I6.I3 

320 

0.31 

0.62 

0.94 

1.25 

1.56 

1.87 

2.19 

2.50 

2.81 

3.12 

6.25 

9-37 

12.50 

15.62 

340 

0.29 

0.59 

0.88 

1.18 

i.47 

I.76 

2.06 

2-35 

2.65 

2.94 

5-88 

8.82 

11.76 

14.71 

360 

0.28 

0.56 

0.83 

i.  ii 

1.39 

1.67 

1.94 

2.22 

2.50 

2.78 

5.56 

8.33 

ii.  ii 

13.89 

380 

0.26 

0.53 

0.79 

1.05 

1.32 

1.58 

1.84 

2.10 

2-37 

2.63 

5.26 

7.89 

10.53 

I3.I6 

400 

0.25 

0.50 

0-75 

I.OO 

1.25 

1.50 

1-75 

2.OO 

2.25 

2.50 

5.00 

7.50 

IO.OO 

12.50 

420 

0.24 

0.48 

0.71 

0-95 

1.19 

1-43 

1.67 

I.90 

2.14 

2.38 

4.76 

7.14 

9.52 

11.90 

440 

0.23 

0.45 

0.68 

0.91 

1.14 

1.36 

1.59 

1.82 

2.05 

2.27 

4.55 

6.82 

9.09 

11.36 

460 

0.22 

0.43 

0.65 

0.87 

1.09 

1.30 

1.52 

1.74 

1.96 

2.17 

4-35 

6.52 

8.70 

10.87 

480 

0.21 

0.42 

0.62 

0.83 

1.04 

1.25 

1.46 

1.67 

1.87 

2.08 

4.17 

6.25 

8.33 

IO.42 

500 

O.2O 

0.40 

0.60 

0.80 

I.OO 

1.20 

1.40 

1.  60 

i.  80 

2.00 

4.00 

6.00 

8.00 

10.00 

520 

0.19 

0.38 

0.58 

0.77 

0.96 

I.I5 

1-35 

1-54 

i.73 

1.92 

3.85 

5-77 

7.69 

9.62 

540 

O.I9 

0.37 

0.56 

0.74 

0-93 

I.  II 

1.30 

1.48 

1.67 

•85 

3.70 

5.56 

7.4i 

9.26 

560 

0.18 

0.36 

0-54 

0.71 

0.89 

1.07 

1-25 

1-43 

1.61 

•79 

3-57 

5.36 

7.14 

8.93 

580 

0.17 

0.34 

0.52 

0.69 

0.86 

1.03 

1.  21 

1.38 

1-55 

•72 

3-45 

5-17 

6.90 

8.62 

600 

0.17 

0.33 

0.50 

0.67 

0.83 

I.OO 

I.I7 

1-33 

1.50 

•  67 

3.33 

5.00 

6.67 

8.33 

620 

0.16 

0.32 

0.48 

0.65 

0.81 

0.97 

I.I3 

1.29 

1.45 

.61 

3-23 

4.84 

6-45 

8.06 

650 

0.15 

0.31 

0.46 

0.62 

0.77 

0.92 

1.08 

1.23 

1.38 

•54 

3-o8 

4.62 

6.15 

7.69 

700 

0.14 

0.29 

0-43 

0-57 

0.71 

0.86 

I.OO 

1.14 

1.29 

.43 

2.86 

4.29 

5.71 

7.14 

750 

0.13 

0.27 

0.40 

0.53 

0.67 

0.80 

0.93 

1.07 

1.20 

•33 

2.67 

4.00 

5.33 

6.67 

800 

0.12 

0.25 

o.37 

0.50 

0.62 

o.75 

0.87 

I.OO 

1.  12 

.25 

2.50 

3-75 

5.00 

6.25 

850 

0.12 

0.24 

o.35 

0.47 

0-59 

0.71 

0.82 

0.94 

1.06 

.18 

2-35 

3-53 

4.71 

5-88 

900 

O.II 

0.22 

0-33 

0-44 

0.56 

0.67 

0.78 

0.89 

I.OO 

I.  II        2.22 

3-33 

4-44 

5.56 

Tabular  values  are  to  be  added  to  the  observed  temperature  to  obtain 

the  temperature  at  sea  level. 

SMITHSONIAN  TABLE*. 


10 


TABLE  8, 


REDUCTION    OF   TEMPERATURE   TO    SEA    LEVEL. 

METRIC    MEASURES. 


Rate  of 

DIFFERENCES  BETWEEN  THE  TEMPERATURE  AT  ANY  AI/MTUDE 

decrease 
of 

AND  AT  SEA  I,EVEI/. 

tcrnoBr* 

ature. 

ALTITUDE  IN  METRES. 

for' 
every 

100 

200 

300 

400 

500 

600 

700 

800 

900 

1000 

2000 

3000 

m. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

100 

I?00 

2?00 

3°oo 

4?oo 

5?oo 

6?oo 

7?oo 

8?oo 

9?oo 

I0?00 

20?00 

3o?oo 

IO2 

0.98 

I.96 

2.94 

3-92 

4.90 

5-88 

6.86 

7.84 

8.82 

9.80 

I9.6l 

29.41 

104 

0.96 

1.92 

2.88 

3-85 

4.81 

5-77 

6-73 

7.69 

8.65 

9.62 

19.23 

28.85 

106 

0.94 

1.89 

2-83 

3-77 

4.72 

5.66 

6.60 

7-55 

8.49 

9.43 

18.87 

28.30 

108 

0.93 

1.85 

2.78 

3-70 

4-63 

5.56 

6.48 

7.41 

8-33 

9.26 

18.52 

27.78 

110 

0.91 

1.82 

2-73 

3.64 

4-55 

5.45 

6.36 

7.27 

8.18 

9.09 

18.18 

27.27 

H5 

0.87 

1.74 

2.61 

3.48 

4.35 

5.22 

6.09 

6.96 

7.83 

8.70 

17-39 

26.09 

120 

0.83 

1.67 

2.50 

3-33 

4.17 

5.00 

5-83 

6.67 

7.50 

8-33 

16.67 

25.00 

125 

0.80 

1.60 

2.40 

3.20 

4.00 

4.80 

5.6o 

6.40 

7.20 

8.00 

1  6.  oo 

24.00 

130 

0.77 

1.54 

2.31 

3.08 

3.85 

4.62 

5.38 

6.15 

6.92 

7.69 

15-38 

23.08 

135 

0.74 

1.48 

2.22 

2.96 

3.70 

4-44 

5.19 

5-93 

6.66 

7.41 

14.81 

22.22 

140 

0.71 

1-43 

2.14 

2.86 

3-57 

4.29 

5.oo 

5-71 

6.43 

7.14 

14.29 

21-43 

145 

0.69 

1.38 

2.07 

2.76 

3-45 

4.14 

4.83 

5-52 

6.21 

6.90 

13.79 

20.69 

150 

0.67 

1.33 

2.00 

2.67 

3-33 

4.00 

4-67 

5-33 

6.00 

6.67 

13-33 

20.00 

155 

0.65 

1.29 

1.94 

2.58 

3.23 

3.87 

4.52 

5.16 

5.8i 

6-45 

12.90 

19.35 

160 

0.62 

1.25 

.87 

2.50 

3.12 

3.75 

4-37 

5.00 

5-62 

6.25 

12.50 

18.75 

170 

0.59 

1.18 

.76 

2-35 

2.94 

3-53 

4.12 

4.70 

5-29 

5.88 

11.76 

17.65 

180 

0.56 

i.  ii 

.67 

2.22 

2.78 

3-33 

3.89 

4-44 

5.00 

5.56 

ii.  ii 

16.67 

190 

0.53 

1.05 

.58 

2.10 

2.63 

3.16 

3.68 

4.21 

4-74 

5-26 

10.53 

15-79 

200 

0.50 

1.  00 

•SO 

2.OO 

2.50 

3.00 

3.50 

4.00 

4.50 

5.00 

10.00 

15.00 

210 

0.48 

o.95 

1.43 

I.90 

2.38 

2.86 

3-33 

3-81 

4.29 

4.76 

9.52 

14.29 

220 

0.45 

0.91 

1.36 

1.82 

2.27 

2.73 

3-18 

3-64 

4.09 

4-55 

9.09 

13.64 

230 

0.43 

0.87 

1.30 

1.74 

2.17 

2.61 

3-04 

3-48 

3.9i 

4.35 

8.70 

13.04 

24O 

0.42 

0.83 

1.25 

1.67 

2.08 

2.50 

2.92 

3-33 

3-75 

4.17 

8.33 

12.50 

250 

0.40 

0.80 

1.20 

1.60 

2.OO 

2.40 

2.80 

3.20 

3.60 

4.00 

8.00 

I2.OO 

260 

0.38 

0.77 

I.I5 

i.54 

1.92 

2.31 

2.69 

3.08 

3.46 

3-85 

7.69 

H.54 

270 

0.37 

0.74 

I.  II 

1.48 

1.85 

2.22 

2.59 

2.96 

3.33 

3.7o 

7.41 

II.  II 

280 

0.36 

0.71 

1.07 

1.43 

1.79 

2.14 

2.50 

2.86 

3.21 

3-57 

7.14 

IO.7I 

290 

0.34 

0.69 

1.03 

1.38 

1.72 

2.07 

2.41 

2.76 

3.10 

3-45 

6.90 

10.34 

300 

0.33 

0.67 

1.  00 

1.33 

1.67 

2.00 

2-33 

2.67 

3.00 

3-33 

6.67 

10.00 

320 

0.31 

0.62 

0.94 

1.25 

1.56 

1.87 

2.19 

2.50 

2.81 

3.12 

6-25 

9-37 

340 

0.29 

o.59 

0.88 

1.18 

1.47 

1.76 

2.06 

2-35 

2.65 

2-94 

5-88 

8.82^ 

360 

0.28 

0.56 

0.83 

i.  ii 

1-39 

1.67 

1.94 

2.22 

2.50 

2.78 

5.56 

8-33 

380 

0.26 

0-53 

0.79 

1.05 

1.32 

1.58 

1.84 

2.10 

2-37 

2.63 

5-26 

7-89 

400 

0.25 

0.50 

o.75 

1.  00 

1.25 

1.50 

i-75 

2.00 

2.25 

2.50 

5.00 

7.50 

420 

0.24 

0.48 

0.71 

o.95 

1.19 

1-43 

1.67 

.90 

2.14 

2.38 

4.76 

7,14 

440 

0.23 

o.45 

0.68 

0.91 

1.14 

1.36 

1-59 

.82 

2.05 

2.27 

4-55 

6.82 

460 

0.22 

0-43 

0.65 

0.87 

1.09 

1.30 

1.52 

•74 

1.96 

2.17 

4-35 

6.52 

480 

0.21 

0.42 

0.62 

0.83 

1.04 

1.25 

1.46 

.67 

1.87 

2.08 

4.17 

6.25 

500 

O.2O 

0.40 

0.60 

0.80 

I.OO 

1.20 

1.40 

.60 

1.80 

2.OO 

4.00 

6.00 

Tabular  values  are  to  be  added  to  the  observed  temperature  to  obtain 

the  temperature  at  sea  level. 

SMITHSONIAN  TABLES. 


II 


TABLE  9. 

CORRECTION    FOR    THE    TEMPERATURE    OF  THE    MERCURY    IN    THE 

THERMOMETER    STEM. 

T—  t  —  0.0000795  n  (t'  —  £}—  Fahrenheit  temperatures. 
T—  t  —  0.000143  n  (tf  —  f)  —  Centigrade  temperatures. 
7—  Corrected  temperature. 
t  =  Observed  temperature. 

f  =  Mean  temperature  of  the  glass  stem  and  mercury  column. 
n  =  Length  of  mercury  in  the  stem  in  scale  degrees. 

CORRECTION  FOR  FAHRENHEIT  THERMOMETERS. 
Values  of  0.0000795    n  (tf  —  f) 


t'  —  t 

10° 

20° 

30° 

40° 

50° 

60° 

70° 

80° 

90° 

100° 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

10° 

0?OI 

0?02 

O?O2 

o?o3 

o?o4 

o?o5 

o?o6 

o?o6 

o?o7 

o?o8 

20 

O.O2 

0.03 

0.05 

0.06 

0.08 

O.IO 

O.  II 

0.13 

o.  14 

o.  16 

30 

O.O2 

0.05 

O.O7 

O.IO 

0.12 

0.14 

0.17 

0.19 

O.  21 

o.  24 

40 

0.03 

0.06 

O.IO 

0.13 

0.16 

0.19 

O.22 

0.25 

0.29 

0.32 

50 

O.O4 

0.08 

O.I2 

o.  16 

0.20 

0.24 

0.28 

0.32 

0.36 

0.40 

60 

0.05 

O.IO 

O.I4 

0.19 

0.24 

0.29 

0-33 

0.38 

0-43 

0.48 

70 

0.06 

O.I  I 

0.17 

O.22 

0.28 

o-33 

o-39 

o-45 

0.50 

0.56 

80 

0.06 

0.13 

O.I9 

0.25 

0.32 

0.38 

0-45 

0.51 

0-57 

0.64 

90 

0.07 

0.14 

O.2I 

0.29 

0.36 

0.43 

0.50 

o.57 

0,64 

0.72 

IOO 

0.08 

0.16 

O.24 

0.32 

0.40 

0.48 

0.56 

0.64 

O.72 

0.79   | 

110 

0.09 

0.17 

0.26 

0.35 

0.44 

0.52 

0.61 

0.70 

0.79 

0.87 

120 

O.  IO 

0.19 

0.29 

0.38 

0.48 

o.57 

0.67 

0.76 

0.86 

0-95 

I30 

O.  IO 

0.21 

0.31 

0.41 

0.52 

0.62 

0.72 

0.83 

°-93 

1.03 

CORRECTION  FOR  CENTIGRADE  THERMOMETERS. 
Values  of  0.000143  n  (tf  —  f] 


n 

r-« 

10° 

20° 

30° 

40° 

50° 

60° 

70° 

80° 

c. 

C. 

c. 

c. 

c. 

c. 

C. 

c. 

c. 

10° 

0?OI 

o?o3 

o?o4 

o?o6 

o?o7 

o?o9 

0?IO 

0?II 

20 

0.03 

0.06 

0.09 

O.II 

0.14 

0.17 

O.2O 

0.23 

30 
40 

0.04 
0.06 

0.09 

O.II 

0.13 
0.17 

0.17 
0.23 

O.2I 
O.29 

0.26 
o.34 

0.30 
0.40 

0.34 

0.46 

50 

0.07 

0.14 

O.2I 

0.29 

0.36 

0-43 

0.50 

0.57 

60 

0.09 

0.17 

0.26 

0.34 

0-43 

0.51 

O.6o 

0.69 

70 

O.IO 

0.20 

0.30 

0.40 

0.50 

0.60 

O.7O 

0.80 

80 

O.II 

0.23 

0-34 

0.46 

0-57 

0.69 

0.80 

0.92 

90 

0.13 

O.26 

0.39 

0.51 

0.64 

0.77 

0.90 

1.03 

IOO 

0.14 

O.29 

o.43 

o.57 

O.72 

0.86 

1.  00 

1.14 

When  t'  is   j 


than  t  the  correction  is  to  be 


f  subtracted  1 
\  added          / 


12 


BAROMETRICAL  TABLES. 


Reduction  of  the  barometer  to  standard  temperature  — 

English  measures   ...............  TABLE  10 

Metric  measures n 

Reduction  of  the  barometer  to  standard  gravity  at  latitude  45° — 

English  measures TABLE  12 

Metric  measures     .          13 

Reduction  of  the  barometer  to  sea  level  —  English  measures. 

Values  of  2000  m TABLE  14 

Correction  of  2000  m  for  latitude      .   '".     ......  15 

B0—  B  =  B(iQm—  i)      .     .     .'    .     ...     .     .     .  .  .*"    .     .  16 

Pv.eduction  of  the  barometer  to  sea  level  —  Metric  measures. 

Values  of  2000 m i\ TABLE  17 

Correction  of  2000  m  for  latitude 18 

B0  —  B  =  B(iom—  i) 19 

Determination  of  heights  by  the  barometer  —  English  measures. 

Values  of  60368  [i  +  0.0010195  X  36]  log  ^9^°.  ....     TABLE  20 

B 

Term  for  temperature 21 

Correction  for  latitude  and  weight  of  mercury  ....  22 

Correction  for  an  average  degree  of  humidity    ....  23 

Correction  for  the  variation  of  gravity  with  altitude  .     .  '24 
Determination  of  heights  by  the  barometer  —  Metric  measures. 

Values  of  18400/0^^ ..    .     .     .     .     .     TABLE  25 

J3 

Term  for  temperature 26 

Correction  for  humidity 27 

Correction  for  latitude  and  weight  of  mercury  ....  28 

Correction  for  the  variation  of  gravity  with  altitude  .     .  29 

Difference   of   height   corresponding   to  a  change  of  o.  i  inch 

in  the  barometer  —  English  measures     .....     TABLE  30 

Difference  of  height  corresponding  to  a  change  of  i  millimetre 

in  the  barometer  —  Metric  measures     ......     TABLE  3 1 

Determination  of  heights  by  the  barometer. 

Formula  of  Babinet «...     TABLE  32 

Barometric  pressures  corresponding  to  the  temperature  of  the 
boiling  point  of  water  — 

English  measures TABLE  33 

Metric  measures 34 


TABLE    10. 

REDUCTION    OF  THE    BAROMETER  TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

19.0 

19.5 

20.0 

20.5 

21.0 

21.5 

22.0 

22.5 

23.0 

23.5 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

0?0 

+0.050 

+0.051 

+0.052 

+0.053 

+0.055 

+0.056 

+0.057 

+0.059 

+0.o6o 

+0.061 

+0.5 

+0.049 

+0.050 

+0.051 

+0.053 

+0.054 

+0.055 

+0.056 

+0.058 

+0.059 

+0.060 

I.O 

.048 

.049 

•050 

.052 

-053 

.054 

•055 

•057 

.058 

•059 

i-5 

.047 

.048 

.049 

.051 

.052 

•053 

•054 

.056 

.057 

.058 

2.O 

.046 

.047 

.049 

.050 

.051 

.052 

•053 

•055 

.056 

.057 

2.5 

•045 

.046 

.048 

.049 

.050 

.051 

.052 

•054 

•055 

•056 

3.0 

+0.044 

+0.046 

+0.047 

+0.048 

+0.049 

+0.050 

+0.051 

+0.053 

+0.054 

+0.055 

3-5 

•043 

.045 

.046 

.047 

.048 

.049 

.050 

.051 

•053 

•054 

4.0 

•043 

.044 

•045 

.046 

.047 

.048 

.049 

.050 

.052 

•053 

4-5 

.042 

•043 

.044 

•045 

.046 

.047 

.048 

.049 

.051 

.052 

5-0 

.041 

.042 

.043 

.044 

•045 

.046 

.047 

.048 

.049 

.051 

5.5 

+0.040 

+0.041 

+0.042 

+0.043 

+0.044 

+0.045 

+0.046 

+0.047 

+0.048 

+0.049 

6.0 

•039 

.040 

.041 

.042 

•043 

.044 

•045 

.046 

•047 

.048 

6.5 

.038 

•039 

.040 

.041 

.042 

•043 

.044 

•045 

.046 

.047 

7.0 

.037 

.038 

•039 

.040 

.041 

.042 

•043 

.044 

.045 

.046 

7-5 

.037 

.038 

.038 

•039 

.040 

.041 

.042 

•043 

.044 

•045 

8.0 

+0.036 

+0.037 

+0.038 

+0.038 

+0.039 

+0.040 

+0.041 

+0.042 

+0.043 

+0.044 

8.5 

.035 

•036 

.037 

•038 

.038 

•039 

.040 

.041 

.042 

•043 

9.0 

•034 

•035 

.036 

•037 

.038 

.038 

•039 

.040 

.041 

.042 

9-5 

•033 

•034 

.035 

.036 

•037 

•037 

.038 

•039 

.040 

.041 

10.0 

.032 

-033 

•034 

.035 

•036 

.036 

-037 

.038 

•039 

.040 

10.5 

+0.031 

+0.032 

+0.033 

+0.034 

+0.035 

+0.035 

+0.036 

+0.037 

+0.038 

+0.039 

II.  0 

.030 

.031 

.032 

•033 

.034 

.034 

.035 

.036 

.037 

.038 

ii.  5 

•  030 

.030 

.031 

.032 

•033 

.034 

•034 

•035 

.036 

.037 

12.0 

.029 

.030 

.030 

.031 

.032 

•033 

•033 

•034 

.035 

.036 

12.5 

.028 

.029 

.029 

.030 

.031 

.032 

.032 

•033 

.034 

•034 

13.0 

+0.027 

+0.028 

+0.028 

+0.029 

+0.030 

+0.031 

+0.031 

+0.032 

+0.033 

+0.033 

13-5 

.026 

.027 

.028 

.028 

.029 

•  030 

.030 

.031 

.032 

.032 

14.0 

.025 

.026 

.027 

.027 

.028 

.029 

.029 

.030 

.031 

.031 

14.5 

.024 

.025 

.026 

.026 

.027 

.028 

.028 

.029 

.030 

•  030 

15-0 

.024 

.024 

.025 

.025 

.026 

.027 

.027 

.028 

.029 

.029 

15.5 

+0.023 

+0.023 

+0.024 

+0.024 

+0.025 

+O.O26 

+0.026 

+0.027 

+0.027 

+0.028 

16.0 

.022 

.023 

.023 

.024 

.024 

.025 

.025 

.026 

.026 

.027 

16.5 

.O2I 

.022 

.022 

.023 

.023 

.024 

.024 

.025 

.025 

.026 

17.0 

.O2O 

.021 

.021 

.022 

.022 

.023 

•  023 

.024 

.024 

•025 

17.5 

.019 

.O2O 

.O2O 

.021 

.O2I 

.022 

.022 

.023 

.023 

.024 

18.0 

+O.OI8 

+O.OI9 

+0.019 

+0.020 

+O.O2O 

+0.021 

+0.021 

+0.022 

+0.022 

+0.023 

18.5 

.017 

.018 

.018 

.019 

.OI9 

.O2O 

.020 

.021 

.021 

.022 

19.0 

.017 

.017 

.018 

.018 

.018 

.019 

.019 

.020 

.O2O 

.O2I 

19-5 

.016 

.016 

.017 

.017 

.017 

.018 

.018 

.OI9 

.019 

.O2C 

20.0 

.015 

.015 

.016 

.Ol6 

.016 

.017 

.017 

.018 

.018 

.018 

20.5 

+0.014 

+0.014 

+0.015 

+0.015 

+O.OI6 

+0.016 

+0.016 

+0.017 

+0.017 

+0.017 

21.0 

.013 

.OI4 

.014 

.OI4 

.015 

.015 

.015 

.Ol6 

.Ol6 

.016 

21.5 

.OI2 

.013 

.013 

.013 

.014 

.014 

.014 

•015 

.015 

.015 

22.O 

.Oil 

.012 

.012 

.012 

.013 

.013 

.013 

.014 

.OI4 

.014 

22.5 

.Oil 

.Oil 

.Oil 

.Oil 

.012 

.012 

.012 

.013 

.013 

•  013 

23.0 

+0.010 

+0.010 

+0.010 

+0.010 

+0.01  1 

+O.OII 

+0.01  1 

+0.012 

+0.012 

+0.012 

23-5 

.009 

.009 

.009 

.010 

.OIO 

.010 

.OIO 

.Oil 

.Oil 

.Oil 

24.0 

.008 

.008 

.008 

.009 

.009 

.009 

.009 

.010 

.010 

.OIO 

24-5 

.007 

.007 

.008 

.008 

.008 

.008 

.008 

.009 

.009 

.009 

25.0 

.006 

.006 

.007 

.007 

.007 

.007 

.007 

.008 

.008 

.008 

SMITHSONIAN  TABLED. 


TABLE  10. 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
!  Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

19.0 

19.5 

20.0 

20.5 

21.0 

21.5 

22.O 

22.5 

23.0 

23.5 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

25?5 

-I-0.005 

+0.006 

+0.006 

+0.006 

+0.006 

+0.006 

+0.006 

+O.OO6 

+0.007 

+0.007 

26.0 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.006 

26.5 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

.005 

27.0 

•  003 

•003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

27-5 

.OO2 

.002 

.002 

.002 

.002 

.002 

.OO2 

.OO2 

.002 

.002 

28.0 

-(-0.001 

+O.OOI 

+O.OOI 

+O.OOI 

+0.001 

+0.001 

+O.OOI 

+0.001 

+O.OOI 

+O.OOI 

28.5 

o.ooo 

O.OOO 

O.OOO 

0.000 

0.000 

0.000 

O.OOO 

O.OOO 

0.000 

0.000 

29.0 

—  O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

29-5 

.002 

.002 

.002 

.002 

.002 

.002 

.002 

.002 

.002 

.002 

30.0 

.002 

.002 

.OO2 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

30.5 

—0.003 

-0.003 

-0.003 

-0.003 

—O.OO4 

—0.004 

—0.004 

—0.004 

—  0.004 

—0.004 

31.0 

.004 

.004 

.OO4 

.OO4 

.005 

.005 

.005 

.005 

.005 

.005 

3i-5 

.005 

.005 

.005 

.005 

.005 

.006 

.006 

.006 

.006 

.006 

32.0 

.006 

.006 

.006 

.006 

.006 

.007 

.007 

.007 

.007 

.007 

32.5 

.007 

.007 

.007 

.007 

.007 

.008 

.008 

.008 

.008 

.008 

33.0 

—O.OOS 

—O.OOS 

—O.OOS 

—O.OOS 

—O.OOS 

—0.009 

—0.009 

—0.009 

—0.009 

—O.OO9 

33-5 

.008 

.009 

.009 

.009 

.009 

.010 

.OIO 

.OIO 

.OIO 

.OIO 

34-o 

.009 

.OIO 

.010 

.010 

.OIO 

.010 

.on 

.on 

.Oil 

.Oil 

34-5 

.OIO 

.010 

.Oil 

.Oil 

.on 

.on 

.012 

.012 

.012 

.013 

35-0 

.Oil 

.Oil 

.012 

.012 

.012 

.012 

.013 

.013 

.013 

.014 

35.5 

—0.012 

—0.012 

—0.012 

—0.013 

—0.013 

—0.013 

—0.014 

—0.014 

—O.OI4 

-0.015 

36.0 

.013 

.013 

.013 

.OI4 

.014 

.014 

.015 

.015 

.015 

.016 

36.5 

.OI4 

.OI4 

.OI4 

.015 

.015 

.015 

.016 

.Ol6 

.016 

.017 

37-o 

.OI4 

.015 

.015 

.016 

.016 

.016 

.017 

.017 

.017 

.018 

37-5 

.015 

.016 

.016 

.017 

.017 

.017 

.018 

.018 

.OI9 

.019 

38.0 

-0.016 

—0.017 

—0.017 

—0.017 

—0.018 

—0.018 

—0.019 

—0.019 

—  O.O2O 

—0.020 

38.5 

.017 

.017 

.018 

.018 

.019 

.019 

.020 

.O2O 

.021 

.O2I 

39-° 

.018 

.018 

.OI9 

.OI9 

.020 

.020 

.021 

.O2I 

.022 

.022 

39-5 

.019 

.OI9 

.020 

.020 

.021 

.021 

.022 

.022 

.023 

.023 

40.0 

.020 

.020 

.021 

.021 

.022 

.022 

.023 

.023 

.024 

.024 

40.5 

-0.020 

—  O.O2I 

—  O.O22 

—  O.O22 

—0.023 

—0.023 

—0.024 

—0.024 

—0.025 

-0.025 

41.0 

.021 

.022 

.022 

.023 

.024 

.024 

.025 

.025 

.026 

.026 

41.5 

.022 

.023 

.023 

.024 

.025 

.025 

.026 

.026 

.027 

.027 

42.0 

.023 

.024 

.024 

.025 

.025 

.026 

.027 

.027 

.028 

.029 

42.5 

.024 

.025 

.025 

.026 

.026 

.027 

.028 

.028 

.029 

.030 

43.0 

-0.025 

—0.025 

—O.O26 

—0.027 

—0.027 

—0.028 

—O.O29 

—O.O29 

—0.030 

—0.031 

43-5 

.026 

.026 

.027 

.028 

.028 

.029 

.030 

.030 

.031 

.032 

44.0 

.026 

.027 

.028 

.029 

.029 

.030 

.031 

.031 

.032 

•033 

44-5 

.027 

.028 

.029 

.030 

.030 

.031 

.032 

.032 

•033 

•034 

45-o 

.028 

.029 

.030 

.030 

.031 

.032 

•033 

•033 

.034 

•035 

45.5 

—O.O29 

—0.030 

—0.031 

—0.031 

—0.032 

-0.033 

-0.034 

-0.034 

-0.035 

—0.036 

46.0 

.030 

.031 

.031 

.032 

•033 

•034 

•035 

•035 

.036 

-037 

46.5 

.031 

.032 

.032 

•033 

•034 

•035 

.036 

.036 

.037 

.038 

47.0 

.032 

.032 

•033 

•034 

•035 

.036 

•037 

-037 

.038 

•039 

47-5 

•033 

•033 

.034 

•035 

.036 

•037 

.038 

.038 

.039 

.040 

48.0 

-0.033 

—0.034 

—0.035 

—0.036 

-0.037 

—0.038 

-0.039 

—O.O4O 

—0.040 

—0.041 

48.5 

•034 

•035 

.036 

-037 

.038 

•039 

.040 

.041 

.041 

.042 

49.0 

•035 

.036 

•037 

.038 

•039 

.040 

.041 

.042 

.042 

•043 

49-5 

.036 

•037 

.038 

•039 

.040 

.041 

.042 

.043 

.044 

.044 

50.0 

•037 

•038 

•039 

.046 

.041 

.042 

•043 

.044 

0.45 

.046 

SMITHSONIAN  TABLES. 


TABLE  10. 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

19.0 

19.5 

20.0 

20.5 

21.0 

21.5 

22.0 

22.5 

23.0 

23.5 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

50?5 

-0.038 

-0.039 

—0.040 

—0.041 

—0.042 

-0.043 

—0.044 

—0.045 

—0.046 

-0.047 

51-0 

•039 

.040 

.041 

.042 

•043 

.044 

•045 

.046 

0.47 

.048 

51-5 

-039 

.040 

.041 

.042 

.044 

•045 

.046 

.047 

.048 

•049 

52.0 

.040 

.041 

.042 

•043 

•044 

.046 

.047 

.048 

.049 

.050 

52.5 

.041 

.042 

•043 

.044 

•045 

.047 

.048 

.049 

.050 

.051 

53.0 

—0.042 

-0.043 

—0.044 

-0.045 

—0.046 

-0.047 

—0.049 

—0.050 

—0.051 

-0.052 

53-5 

•043 

.044 

•045 

.046 

.047 

.048 

.050 

.051 

.052 

•053 

54-0 

.044 

•045 

.046 

.047 

.048 

.049 

.051 

.052 

•053 

•054 

54-5 

•045 

.046 

.047 

.048 

.049 

.050 

.052 

•053 

.054 

•055 

55-0 

•045 

.047 

.048 

.049 

.050 

.051 

•053 

•054 

•055 

.056 

55.5 

—0.046 

—0.047 

-0.049 

—0.050 

—0.051 

—0.052 

—0.054 

-0.055 

-0.056 

-0.057 

56.0 

.047 

.048 

•  050 

.051 

.052 

•053 

•055 

.056 

•057 

.058 

56.5 

.048 

.049 

.050 

.052 

•053 

•054 

.056 

.057 

.058 

•059 

57-0 

.049 

.050 

.051 

•053 

•054 

•055 

.057 

.058 

-059 

.060 

57-5 

.050 

.051 

.052 

•054 

•055 

.056 

.058 

•059 

.060 

.O6l 

58.0 

-0.051 

—0.052 

-0.053 

-0.055 

—0.056 

-0.057 

-0.059 

—O.o6o 

—O.o6  1 

—0.063 

58.5 

.051 

•053 

•054 

•055 

•057 

.058 

.060 

.061 

.062 

.064 

59-° 

.052 

-054 

•055 

.056 

.058 

•059 

.061 

.062 

.063 

.065 

59-5 

•053 

•055 

.056 

•057 

•059 

.060 

.061 

•063 

.064 

.066 

60.0 

.054 

•055 

•057 

.058 

.060 

.061 

.062 

.064 

.065 

.067 

60.5 

-0-055 

—0.056 

-0.058 

-0.059 

—  0.061 

—0.062 

-0.063 

-0.065 

—0.066 

-0.068 

61.0 

.056 

•057 

•059 

.060 

.062 

•063 

.064 

.066 

.067 

.069 

61.5 

•057 

.058 

.060 

.061 

.062 

.064 

.065 

.067 

.068 

.070 

62.0 

•057 

•059 

.060 

.062 

.063 

.065 

.066 

.068 

.069 

.071 

62.5 

.058 

.060 

.061 

.063 

.064 

.066 

.067 

.069 

.071 

.072 

63.0 

-0.059 

—  0.061 

—0.062 

—0.064 

—0.065 

—0.067 

-0.068 

—0.070 

—0.072 

-0.073 

63-5 

.060 

.062 

.063 

.065 

.066 

0.68 

.069 

.071 

•073 

.074 

64.0 

.061 

.062 

.064 

.066 

.067 

.069 

.070 

.072 

.074 

•075 

64-5 

.062 

.063 

.065 

.067 

.068 

.070 

.071 

-073 

•075 

.076' 

65.0 

.063 

.064 

.066 

.067 

.069 

.071 

.072 

.074 

.076 

.077 

65.5 

-0.063 

-0.065 

—0.067 

—0.068 

—0.070 

—0.072 

-0.073 

-0.075 

-0.077 

—0.078 

66.0 

.064 

.066 

.068 

.069 

.071 

•073 

.074 

.076 

.078 

.079 

66.5 

.065 

.067 

.069 

.070 

.072 

.074 

•075 

.077 

.079 

.081 

67.0 

.066 

.068 

.069 

.071 

•073 

•075 

.076 

.078 

.080 

.082 

67.5 

.067 

.069 

.070 

.072 

.074 

.076 

.077 

.079 

.081 

•083 

68.0 

-0.068 

—0.069 

—0.071 

-0.073 

-0.075 

-0.077 

—0.078 

—0.080 

—0.082 

—0.084 

68.5 

.069 

.070 

.072 

.074 

.076 

.078 

.079 

.081 

•083 

•085 

69.0 

.069 

.071 

•073 

•075 

.077 

•079 

.080 

.082 

.084 

.086 

69-5 

.070 

.072 

.074 

.076 

.078 

.079 

.081 

•083 

.085 

.087 

70.0 

.071 

•073 

•075 

.077 

.079 

.080 

.082 

.084 

.086 

.088 

70.5 

—0.072 

-0.074 

—0.076 

—0.078 

—0.080 

—0.081 

-0.083 

-0.085 

—0.087 

—0.089 

71.0 

•073 

•075 

.077 

.079 

.080 

.082 

.084 

.086 

.088 

.090 

7i-5 

.074 

.076 

.078 

.079 

.081 

.083 

.085 

.087 

.089 

.091 

72.0 

.075 

.076 

.078 

.080 

.082 

.084 

.086 

.088 

.090 

.092 

72.5 

•075 

.077 

.079 

.081 

.083 

.085 

.087 

.089 

.091 

•093 

73.0 

—0.076 

—0.078 

—0.080 

—0.082 

—0.084 

—0.086 

—0.088 

—0.090 

—0.092 

-0.094 

73-5 

.077 

.079 

.O8l 

.083 

.085 

.087 

.089 

.091 

•093 

•095 

74.0 

.078 

.080 

.082 

.084 

.086 

.088 

.090 

.092 

.094 

.096 

74-5 

.079 

.081 

.083 

.085 

.087 

.089 

.091 

•093 

•095 

.097 

75-0 

.080 

.082 

.084 

.086 

.088 

.090 

.092 

•094 

.096 

.099 

SMITHSONIAN  TABLES. 


16 


TABLE  10 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT   OF  THE   BAROMETER   IN   INCHES. 

19.0 

19.5 

20.0 

20.5 

21.0 

21.5 

22.0 

22.5 

23.0 

23.5 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

75?5 

-O.oSl 

-0.083 

-0.085 

—0.087 

—0.089 

—0.091 

-0.093 

-0.095 

-0.097 

—O.IOO 

76.0 

.O8l 

.084 

.086 

.088 

.090 

.092 

.094 

.096 

.098 

.101 

76.5 

.082 

.084 

.087 

.089 

.091 

-093 

•095 

.097 

.100 

.IO2 

77-0 

•083 

-085 

.087 

.090 

.092 

.094 

.096 

.098 

.101 

.103 

77-5 

.084 

.086 

.088 

.091 

•093 

•095 

.097 

.099 

.102 

.104 

78.0 

-0.085 

-0.087 

—0.089 

—0.091 

-0.094 

—0.096 

—0.098 

—  O.IOO 

—0.103 

-0.105 

78.5 

.086 

.088 

.090 

.092 

•095 

.097 

.099 

.101 

.IO4 

.106 

79.0 

.086 

.089 

.091 

•093 

.096 

.098 

.100 

.102 

.105 

.107 

79-5 

.087 

.090 

.092 

.094 

.097 

.099 

.101 

.103 

.106 

.108 

80.0 

.088 

.091 

•093 

•095 

.097 

.100 

.102 

.104 

.107 

.109 

80.5 

-0.089 

—0.091 

-0.094 

—0.096 

—0.098 

—  O.IOI 

—o.  103 

—0.105 

-0.108 

—O.I  10 

81.0 

.090 

.092 

•095 

.097 

.099 

.102 

.104 

.106 

.109 

.III 

81.5 

.091 

•093 

.096 

.098 

.100 

.103 

.105 

.107 

.no 

.112 

82.0 

.092 

.094 

.096 

.099 

.101 

.104 

.106 

.108 

.in 

•IJ3 

82.5 

.092 

•095 

.097 

.100 

.102 

.105 

.107 

.109 

.112 

.114 

83.0 

-0.093 

—0.096 

-0.098 

—  O.  IOI 

—  o.  103 

—  0.106 

—0.108 

—  O.III 

-0.113 

-0.115 

83-5 

.094 

.097 

.099 

.102 

.104 

.107 

.109 

.112 

.114 

.117 

84.0 

•095 

.098 

.100 

.103 

.105 

.108 

.110 

•113 

•US 

.118 

84-5 

.096 

.098 

.101 

.103 

.106 

.108 

.III 

.114 

.116 

.119 

85.0 

.097 

.099 

.102 

.104 

.107 

.109 

.112 

•US 

.117 

.120 

85.5 

-0.098 

—  0.100 

-0.103 

—  o.  105 

—O.IOS 

—O.I  10 

—O.II3 

—  0.116 

-0.118 

—  O.I2I 

86.0 

.098 

.101 

.104 

.106 

.109 

.III 

.114 

.117 

.119 

.122 

86.5 

.099 

.102 

.105 

.107 

.110 

.112 

."5 

.118 

.120 

.123 

87.0 

.IOO 

.103 

-105 

.108 

.III 

.113 

.116 

.119 

.121 

.124 

87-5 

.101 

.IO4 

.106 

.109 

.112 

.114 

.117 

.120 

.122 

.125 

88.0 

—  0.  102 

-0.105 

—  0.107 

—O.I  10 

—O.II3 

—O.II5 

—O.II8 

—  O.I2I 

—0.123 

—  0.126 

88.5 

.103 

.105 

.108 

.III 

.114 

.116 

.119 

.122 

.124 

.127 

89.0 

.IO4 

.106 

.109 

.112 

.114 

.117 

.I2O 

.123 

.125 

.128 

89-5 

.104 

.107 

.110 

-113 

•US 

.118 

.121 

.124 

.126 

.129 

90.0 

•105 

.108 

.III 

.114 

.116 

.119 

.122 

•125 

.127 

.130 

90.5 

—o.i  06 

—0.109 

—  O.II2 

—O.II4 

—O.II7 

—O.I  2O 

—  O.I23 

—  O.I26 

—0.128 

—O.I3I 

91.0 

.107 

.no 

-H3 

•US 

.118 

.121 

.124 

.127 

.«9 

.132 

9J-5 

.108 

.III 

.113 

.116 

.II9 

.122 

,I25 

.128 

•131 

•133 

92.0 

.109 

.112 

.114 

.117 

.120 

.123 

.126 

.129 

.132 

•134 

92.5 

.110 

.112 

.115 

.118 

.121 

.124 

.127 

.130 

•133 

•135 

93.0 

—O.I  10 

-O.II3 

—  0.116 

—O.II9 

—0.122 

—0.125 

-0.128 

-O.I3I 

-0.134 

-0.137 

93-5 

.III 

.114 

.117 

.120 

.123 

.126 

.129 

.132 

•135 

.138 

94.0 

.112 

•US 

.118 

.121 

.124 

.127 

.130 

•133 

.136 

•139 

94-5 

•113 

.116 

.119 

.122 

•125 

.128 

.131 

-134 

.137 

.140 

95-o 

.114 

.117 

.120 

.123 

.126 

.129 

.132 

•!3S 

.138 

.141 

95.5 

-O.II5 

-O.II8 

—  O.I2I 

—O.I24 

—O.I27 

—0.130 

-0.133 

-0.136 

-0.139 

—  o.  142 

96.0 

•US 

.119 

.122 

•125 

.128 

.131 

-134 

-137 

.140 

•143 

96.5 

.116 

.119 

.122 

.126 

.I29 

.132 

•135 

.138 

.141 

.144 

97.0 

.117 

.120 

.123 

.126 

.130 

-133 

.136 

.139 

.142 

•145 

97-5 

.118 

.121 

.124 

.127 

.130 

•134 

•137 

.140 

•  143 

.146 

98.0 

—O.II9 

—0.122 

-0.125 

-0.128 

-O.I3I 

-0.135 

-0.138 

—0.141 

—0.144 

-0.147 

98.5 

.120 

.123 

.126 

.129 

.132 

-135 

•139 

.142 

-i45 

.148 

99-0 

.121 

.124 

.127 

.130 

•133 

.136 

.I4O 

.143 

.146 

.149 

99-5 

.121 

.125 

.128 

.131 

-134 

•137 

.141 

.144 

.147 

.150 

IOO.O 

.122 

.126 

.129 

.132 

-135 

.138 

.142 

.145 

.148 

.151 

SMITHSONIAN  TABLES. 


TABLE  10. 
REDUCTION 


OF  THE    BAROMETER  TO    STANDARD   TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER   IN   INCHES. 

24.0 

24.2 

24.4 

24.6 

24.8 

25.0 

25.2 

25.4 

25.6 

25.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

0?0 

+0.063 

+0.063 

+0.064 

+0.064 

+0.065 

+0.065 

+0.066 

+0.066 

+0.067 

+0.067 

+0.5 

+0.061 

+0.062 

+0.063 

+0.063 

+0.064 

+0.064 

+0.065 

+0.065 

+0.066 

+0.066 

I.O 

.060 

.061 

.061 

.062 

.062 

.063 

•063 

.064 

.064 

.065 

i-5 

•059 

.060 

.060 

.061 

.061 

.062 

.062 

.063 

.063 

.064 

2.0 

.058 

.059 

•059 

.060 

.060 

.061 

.061 

.062 

.062 

.063 

2-5 

•057 

.058 

.058 

•059 

•059 

•059 

.060 

.060 

.061 

.061 

3.0 

+0.056 

+0.056 

+0.057 

+0.057 

+0.058 

+0.058 

+0.059 

+0.059 

+0.o6o 

+0.o6o 

3-5 

•055 

•055 

.056 

.056 

•057 

•057 

.058 

.058 

•059 

•059 

4.0 

•054 

•054 

•055 

•055 

.056 

.056 

•057 

•057 

•057 

.058 

4-5 

•053 

•053 

•054 

•054 

•054 

•055 

•055 

.056 

.056 

•057 

5-0 

.052 

.052 

.052 

•053 

.053 

•054 

•054 

•055 

•055 

.056 

5.5 

+0.051 

+0.051 

+0.051 

+0.052 

+0.052 

+0.053 

+0.053 

+0.053 

+0.054 

+0.054 

6.0 

.049 

.050 

.050 

.051 

.051 

.052 

.052 

.052 

•053 

•053 

6.5 

.048 

.049 

.049 

.050 

.050 

.050 

.051 

.051 

.052 

.052 

7.0 

.047 

.048 

.048 

.048 

.049 

.049 

.050 

.050 

.050 

.051 

7-5 

.046 

.047 

.047 

.047 

.048 

.048 

.048 

.049 

.049 

.050 

8.0 

+0.045 

+0.045 

+0.046 

+0.046 

+0.047 

+0.047 

+0.047 

+0.048 

+0.048 

+0.048 

8-5 

.044 

.044 

•045 

•045 

•045 

.046 

.046 

.047 

•047 

.047 

9.0 

•043 

•043 

.044 

•044 

.044 

•045 

•045 

•045 

.046 

.046 

9-5 

.042 

.042 

.042 

•043 

•043 

.044 

.044 

.044 

•045 

•045 

10.  0 

.041 

.041 

.041 

.042 

.042 

.042 

•043 

•043 

•043 

.044 

10.5 

+0.040 

+0.040 

+0.040 

+0.041 

+0.041 

+0.041 

+0.042 

+0.042 

+0.042 

+0.043 

II.  0 

•039 

•039 

•039 

•039 

.040 

.040 

.040 

.041 

.041 

.041 

11.5 

•037 

•038 

.038 

.038 

•039 

•039 

•039 

.040 

.040 

.040 

12.0 

.036 

•037 

•037 

•037 

•038 

.038 

.038 

.038 

•039 

•039 

12.5 

•035 

•  036 

.036 

.036 

.036 

•037 

•037 

•037 

.038 

.038 

13.0 

+0.034 

+0.034 

+0.035 

+0.035 

+0.035 

+0.036 

+0.036 

+0.036 

+0.036 

+0.037 

13-5 

•033 

•033 

•034 

.034 

.034 

•034 

•035 

•035 

.035 

.036 

14.0 

.032 

.032 

.032 

•033 

•033 

•033 

•034 

•034 

•034 

•034 

14-5 

.031 

.031 

.031 

•032 

.032 

.032 

.032 

•033 

•033 

•033 

15.0 

.030 

.030 

.030 

.030 

.031 

.031 

.031 

.031 

.032 

.032 

15.5 

+0.029 

+0.029 

+0.029 

+0.029 

+0.030 

+0.030 

+0.030 

+0.030 

+0.031 

+0.031 

16.0 

.028 

.028 

.028 

.028 

.028 

.029 

.029 

.029 

.029 

.030 

16.5 

.026 

.027 

.027 

.027 

.027 

.028 

.028 

.028 

.028 

.028 

17.0 

.025 

.026 

.026 

.026 

.026 

.026 

.027 

.027 

.027 

.027 

17-5 

.024 

.024 

.025 

•  025 

.025 

.025 

.026 

.026 

.026 

.026 

18.0 

+0.023 

+0.023 

+0.024 

+0.024 

+0.024 

+0.024 

+0.024 

+0.025 

+0.025 

+0.025 

18.5 

.022 

.022 

.022 

.023 

.023 

.023 

.023 

.023 

.024 

.024 

19.0 

.O2I 

.021 

.O2I 

.022 

.022 

.022 

.022 

.022 

.022 

.023 

19-5 

.O2O 

.020 

.O2O 

.O2O 

.O2I 

.021 

.021 

.021 

.O2I 

.021 

20.0 

.Gig 

.019 

.019 

.019 

.019 

.020 

.020 

.020 

.020 

.020 

20.5 

+O.OI8 

+O.OI8 

+0.018 

+0.018 

+  0.018 

+0.018 

+0.019 

+0.019 

+O.OI9 

+0.019 

21.  0 

.017 

.017 

.017 

.017 

.017 

.017 

.017 

.018 

.018 

.018 

21.5 

.016 

.016 

.Ol6 

.016 

.016 

.Ol6 

.Ol6 

.016 

.017 

.017 

22.0 

.014 

.015 

.015 

.015 

.015 

.015 

.015 

.015 

.015 

.Ol6 

22.5 

.013 

.013 

.014 

.014 

.014 

.014 

.014 

.014 

.014 

.014 

23.0 

+0.012 

+0.012 

+0.012 

+0.013 

+0.013 

+0.013 

+0.013 

+0.013 

+0.013 

+0.013 

23-5 

.Oil 

.Oil 

.Oil 

.Oil 

.012 

.012 

.012 

.012 

.012 

.012 

24.0 

.010 

.010 

.010 

.010 

.010 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

24-5 

.009 

.009 

.009 

.009 

.009 

.009 

.009 

.OIO 

.010 

.010 

25.0 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

.009 

SMITHSONIAN  TABLES. 


18 


TABLE  10, 
REDUCTION   OF  THE   BAROMETER    TO    STANDARD    TEMPERATURE. 

ENGLISH     MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

24.O 

24.2 

24.4 

24.6 

24.8 

25.0 

25.2 

25.4 

25.6 

25.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

25?5 

-1-0.007 

+0.007 

+0.007 

+0.007 

+0.007 

+0.007 

+0.007 

+0.007 

+0.007 

+0.007 

26.0 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

26.5 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

27.0 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

27-5 

.002 

.002 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

28.0 

-(-0.001 

+O.OOI 

+O.OOI 

+O.OOI 

+O.OOI 

+0.001 

+O.OOI 

+0.001 

+0.001 

+0.001 

28.5 

o.ooo 

O.OOO 

o.ooo 

o.ooo 

o.ooo 

o.ooo 

o.ooo 

o.ooo 

0.000 

0.000 

29.0 

—  O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

29-5 

.002 

.002 

.002 

.002 

.002" 

.002 

.002 

.002 

.002 

.002 

30.0 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

30.5 

—0.004 

—0.004 

—0.004 

—0.004 

—0.004 

—0.004 

—0.004 

—0.004 

—0.004 

—0.004 

31.0 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.006 

.006 

3T-5 

.006 

.OO6 

.006 

.006 

.006 

.007 

.007 

.007 

.007 

.007 

32.0 

.007 

.007 

.007 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

32-5 

.008 

.009 

.009 

.009 

.009 

.009 

.009 

.009 

.009 

.009 

33.0 

—  0.010 

—  O.OIO 

—O.OIO 

—O.OIO 

—O.OIO 

—O.OIO 

—O.OIO 

—O.OIO 

—O.OIO 

—O.OIO 

33-5 

.on 

.on 

.Oil 

.on 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

34-o 

.012 

.012 

.012 

.012 

.012 

.012 

.012 

.012 

.012 

.013 

34-5 

.013 

.013 

.013 

.013 

.013 

.013 

.013 

.014 

.014 

.014 

35-0 

.014 

.014 

.014 

.014 

.014 

.014 

.015 

.015 

.015 

.015 

35.5 

-0.015 

—0.015 

—0.015 

—0.015 

—0.015 

—  0.016 

—  0.016 

—  0.016 

-0.016 

—  0.016 

36.0 

.016 

.016 

.016 

.016 

.017 

.017 

.017 

.017 

.017 

.017 

36.5 

.017 

.017 

.017 

.018 

.018 

.018 

.018 

.018 

.018 

.018 

37-0 

.018 

.018 

.019 

.019 

.019 

.019 

.019 

.019 

.019 

.019 

37-5 

.019 

.019 

.020 

.020 

.020 

.020 

.020 

.020 

.021 

.021 

38.0 

—  O.O2O 

—0.021 

—0.021 

—  O.O2I 

—  O.O2I 

—  O.O2I 

—  O.O2I 

—0.022 

—0.022 

—0.022 

38.5 

.021 

.022 

.022 

.022 

.022 

.022 

.023 

.023 

.023 

.023 

39-0 

.023 

.023 

.023 

.023 

.023 

.024 

.024 

.024 

.024 

.024 

39-5 

.024 

.024 

.024 

.024 

.024 

.025 

.025 

.025 

.025 

.025 

40.0 

.025 

.025 

.025 

.025 

.026 

.026 

.026 

.026 

.026 

.027 

40.5 

—O.O26 

—O.O26 

—0.026 

—0.026 

—0.027 

—0.027 

—0.027 

—0.027 

—0.028 

—0.028 

41.0 

.027 

.027 

.027 

.028 

.028 

.028 

.028 

.029 

.029 

.029 

4i.5 

.028 

.028 

.028 

.029 

.029 

.029 

.029 

.030 

.030 

.030 

42.0 

.029 

.029 

.030 

.030 

.030 

.030 

.031 

.031 

.031 

.031 

42.5 

.030 

.030 

.031 

.031 

.031 

.031 

.032 

.032 

.032 

.032 

43.0 

—0.031 

-0.032 

—0.032 

-0.032 

—0.032 

-0.033 

-0.033 

-0.033 

-0.033 

-0.034 

43-5 

.032 

•033 

•033 

.033 

.033 

.034 

•034 

.034 

.035 

.035 

44.0 

.033 

.034 

•034 

.034 

.035 

.035 

.035 

.035 

.036 

.036 

44-5 

•035 

•035 

•035 

.035 

.036 

.036 

.036 

.037 

.037 

.037 

45-o 

.036 

.036 

.036 

.037 

.037 

.037 

.037 

.038 

.038 

.038 

45.5 

-0.037 

-0.037 

-0.037 

—0.038 

—0.038 

—0.038 

-0.039 

—0.039 

—0.039 

-0.039 

46.0 

.038 

.038 

.038 

.039 

.039 

.039 

.040 

.040 

.040 

.041 

46.5 

•039 

•039 

.040 

.040 

.040 

.041 

.041 

.041 

.041 

.042 

47.0 

.O4O 

.040 

.041 

.041 

.041 

.042 

.042 

.042 

.043 

.043 

47-5 

.041 

.041 

.042 

.042 

.042 

.043 

.043 

•043 

.044 

.044 

48.0 

-0.042 

—  O.O42 

-0.043 

-0.043 

—0.044 

—0.044 

—0.044 

-0.045 

-0.045 

-0.045 

48.5 

•043 

.044 

.044 

.044 

•045 

.045 

.045 

.046 

.046 

.046 

49.0 

.044 

•045 

•045 

.045 

.046 

.046 

.047 

.047 

.047 

.048 

49-5 

•045 

.046 

.046 

.047 

.047 

.047 

.048 

.048 

.048 

.049 

50.0 

.046 

.047 

.047 

.048 

.048 

.048 

.049 

.049 

.050 

.050 

SMITHSONIAN  TABLES. 


TABLE  10. 
REDUCTION    OF  THE    BAROMETER   TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
|    Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE   BAROMETER   IN   INCHES. 

24.0 

24.2 

24.4 

24.6 

24.8 

25.O 

25.2 

25.4 

25.6 

25.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

50?5 

—0.048 

—0.048 

—0.048 

—0.049 

—0.049 

—0.050 

-o.  050 

-0.050 

—0.051 

-0.051 

51-0 

.049 

.049 

.049 

.050 

.050 

.051 

.051 

.051 

.052 

.052 

51-5 

.050 

.050 

.051 

.051 

.051 

.052 

.052 

.053 

•053 

•053 

52.0 

.051 

.051 

.052 

.052 

•053 

•053 

•053 

•054 

•054 

•055 

52.5 

.052 

.052 

•053 

•053 

•054 

•054 

•055 

•055 

•055 

.056 

53.0 

-0.053 

-0.053 

-0.054 

-0.054 

-0.055 

-0.055 

—0.056 

—0.056 

-0.057 

-0.057 

53-5 

•054 

•055 

•055 

•055 

.056 

.056 

•057 

•057 

.058 

.058 

54-° 

.055 

.056 

.056 

•057 

•057 

•057 

.058 

.058 

.059 

•059 

54-5 

.056 

•057 

•057 

.058 

.058 

•059 

•059 

.060 

.060 

.060 

55-o 

•057 

.058 

.058 

•059 

•059 

.060 

.060 

.061 

.061 

.062 

55.5 

-0.058 

—0.059 

-0.059 

—0.060 

—O.o6o 

—  0.061 

—0.06  1 

—0.062 

—0.062 

—0.063 

56.0 

.060 

.060 

.060 

.061 

.061 

.062 

.062 

•063 

•063 

.064 

56.5 

.061 

.061 

.062 

.062 

.063 

.063 

.064 

.064 

.065 

.065 

57-o 

.062 

.062 

•063 

•063 

.064 

.064 

.065 

.065 

.066 

.066 

57-5 

.063 

•063 

.064 

.064 

•065 

.065 

.066 

.066 

.067 

.067 

58.0 

—0.064 

—0.064 

-0.065 

—0.065 

-0.066 

-0.066 

—0.067 

-0.068 

-0.068 

—0.069 

58.5 

.065 

.065 

.066 

.067 

.067 

.068 

.068 

.069 

.069 

.070 

59-° 

.066 

.067 

.067 

.068 

.068 

.069 

.069 

.070 

.070 

.071 

59-5 

.067 

.068 

.068 

.069 

.069 

.070 

.070 

.071 

.072 

.072 

60.0 

.068 

.069 

.069 

.070 

.070 

.071 

.072 

.072 

•073 

•073 

60.5 

—0.069 

—0.070 

—0.070 

—0.071 

—0.072 

—0.072 

-0.073 

—0.073 

-0.074 

-0.074 

61.0 

.070 

.071 

.072 

.072 

•073 

•073 

.074 

.074 

•075 

.076 

61.5 

.071 

.072 

•073 

-073 

.074 

.074 

•075 

.076 

.076 

•077 

62.0 

•073 

-073 

.074 

.074 

•075 

.076 

.076 

.077 

.077 

.078 

62.5 

.074 

.074 

•075 

•075 

.076 

.077 

.077 

.078 

.078 

.079 

63.0 

-0.075 

-0.075 

—0.076 

-0.077 

-0.077 

—0.078 

—0.078 

-0.079 

—0.080 

-0.080 

63.5 

.076 

.076 

.077 

.078 

.078 

.079 

.080 

.080 

.O8l 

.081 

64.0 

.077 

.077 

.078 

.079 

.079 

.080 

.081 

.081 

.082 

.082 

64-5 

.078 

.079 

.079 

.080 

.081 

.081 

.082 

.082 

•083 

.084 

65.0 

.079 

.080 

.080 

.081 

.082 

.082 

.083 

.084 

.084 

.085 

65.5 

—0.080 

—O.oSl 

-O.oSl 

—0.082 

-0.083 

—0.083 

—0.084 

-0.085 

-0.085 

-0.086 

66.0 

.081 

.082 

.083 

•083 

.084 

.085 

.085 

.086 

.087 

.087 

66.5 

.082 

.083 

.084 

.084 

-085 

.086 

.086 

.087 

.088 

.088 

67.0 

.083 

.084 

•085 

•085 

.086 

.087 

.087 

.088 

.089 

.090 

67.5 

.084 

.085 

.086 

.087 

.087 

.088 

.089 

.089 

.090 

.091 

68.0 

-0.085 

-0.086 

—0.087 

-0.088 

-0.088 

-0.089 

—0.090 

—0.090 

—0.091 

—0.092 

68.5 

.087 

.087 

.088 

.089 

.089 

.090 

.091 

.092 

.092 

•093 

69.0 

.088 

.088 

.089 

.090 

.091 

.091 

.092 

-093 

•093 

.094 

69.5 

.089 

.089 

.090 

.091 

.092 

.092 

•093 

.094 

•095 

•095 

70.0 

.090 

.091 

.091 

.092 

.093 

.094 

.094 

•095 

.096 

.097 

70.5 

—0.091 

—0.092 

—0.092 

-0.093 

—0.094 

-0.095 

-0.095 

—0.096 

-0.097 

-0.098 

71.0 

.092 

•093 

.094 

.094 

-095 

.096 

.097 

.097 

.098 

.099 

71-5 

•093 

.094 

•095 

•095 

.096 

.097 

.098 

.098 

.099 

.IOO 

72.0 

.094 

•095 

.096 

.096 

.097 

.098 

.099 

.IOO 

.IOO 

.101 

72.5 

.095 

.096 

.097 

.098 

.098 

.099 

.IOO 

.101 

.102 

.102 

73.0 

—0.096 

-0.097 

-0.098 

-0.099 

—  0.100 

—  O.IOO 

—  O.IOI 

—  O.  IO2 

-o.  103 

—  o.  104 

73-5 

.097 

.098 

.099 

.IOO 

.101 

.101 

.102 

.103 

.104 

.105 

74.0 

.098 

.099 

.100 

.101 

.102 

.103 

.103 

.104 

.105 

.106 

74-5 

.IOO 

.100 

.101 

.102 

.103 

.104 

.105 

.105 

.106 

.107 

75-0 

.101 

.101 

.102 

.103 

.104 

.105 

.106 

.106 

.107 

.108 

SMITHSONIAN  TABLES. 


20 


TABLE  10. 
REDUCTION   OF  THE   BAROMETER    TO  STANDARD  TEMPERATURE. 

ENGLISH     MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE   BAROMETER  IN  INCHES. 

t   (7*, 

• 

24.O 

24.2 

24.4 

24.6 

24.8 

25.0 

25.2 

25.4 

25.6 

s 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch.  ",, 

• 

75?5 

—  O.  IO2 

-o.  103 

-o.  103 

—  o.  104 

-o.  105 

—  0.106 

—0.107 

—  o.  108 

—  o.  108 

—0.109 

76.0 

.103 

.104 

.104 

.105 

.106 

.107 

.108 

.109 

.110 

.IIO 

76.5 

.104 

.105 

.106 

.106 

.107 

.108 

.109 

.IIO 

.III 

.112 

77.0 

.105 

.106 

.107 

.108 

.108 

.109 

.IIO 

.III 

.112 

•113 

77-5 

.106 

.107 

.108 

.109 

.110 

.110 

.III 

.112 

.113 

.114 

78.0 

—  o.  107 

—  o.  108 

—  o.  109 

—O.I  10 

—  O.III 

—O.I  12 

—  O.II2 

—O.II3 

—O.II4 

—O.II5 

78.5 

.108 

.109 

.110 

.III 

.112 

•113 

.114 

.114 

•US 

.116 

79.0 

.109 

.IIO 

.III 

.112 

-113 

.114 

•US 

.116 

.117 

.117 

79-5 

.IIO 

.III 

.112 

•113 

.114 

.115 

.116 

.117 

.118 

.119 

80.0 

.III 

.112 

•113 

.114 

•US 

.116 

.117 

.118 

.119 

.I2O 

80.5 

—  O.II2 

—O.II3 

—O.II4 

-O.II5 

—  0.116 

—O.II7 

—O.IlS 

—O.II9 

—0.120 

—  O.I2I 

81.0 

.114 

•US 

.115 

.116 

.117 

.118 

.119 

.120 

.121 

.122 

81.5 

.116 

.117 

.118 

.118 

.119 

.I2O 

.121 

.122 

.123 

82.0 

!ll6 

.117 

.118 

.119 

.120 

.121 

.122 

.122 

.123 

.124 

82.5 

.117 

.118 

.119 

.120 

.121 

.122 

.123 

.124 

•  125 

.126 

83.0 

-O.II8 

—O.II9 

—0.120 

—  O.I2I 

—0.122 

—0.123 

—0.124 

—0.125 

—O.I26 

—O.I27 

83-5 

.119 

.120 

.121 

.122 

.123 

.124 

•125 

.126 

.127 

.128 

84.0 

.120 

.121 

.122 

.123 

.124 

.125 

.126 

.127 

.128 

.129 

84-5 

.121 

.122 

.123 

.124 

•125 

.126 

.127 

.128 

.129 

.130 

85.0 

.122 

.123 

.124 

.125 

.126 

.127 

.128 

.129 

.130 

85.5 

—0.123 

—0.124 

-0.125 

—0.126 

—0.127 

—0.128 

—  O.I29 

—  o.  130 

-O.I3I 

-0.133 

86.0 

.124 

.125 

.126 

.127 

.128 

.130 

•131 

.132 

•133 

•134 

86.5 

-125 

.126 

.128 

.129 

.130 

.132 

•133 

•134 

•135 

87.0 

.126 

.128 

.129 

.130 

.132 

•133 

•134 

•135 

.136 

87.5 

.128 

.129 

.130 

.132 

•133 

•134 

•135 

.136 

•137 

88.0 

—0.129 

-o.  130 

-O.I3I 

-0.132 

-0.133 

-0.134 

-0.135 

—0.136 

-0.137 

-0.138 

88.5 

.130 

.131 

.132 

•133 

-134 

•135 

.136 

•137 

.138 

•139 

89.0 

.132 

•133 

.134 

•135 

.136 

•137 

.138 

.I4O 

.141 

89-5 

.132 

•133 

•134 

•135 

.136 

-137 

.138 

.I4O 

.141 

.142 

90.0 

•133 

•134 

•135 

.136 

•137 

.138 

.I4O 

.141 

.142 

•143 

90.5 

-0.134 

-0.135 

-o.  136 

-0.137 

-01.39 

—  o.  140 

—O.I4I 

—  o.  142 

-0.143 

-0.144 

91.0 

•135 

.136 

•137 

.138 

.140 

.141 

.142 

.143 

.144 

•145 

91.5 

.136 

•137 

.138 

.140 

.141 

.142 

•143 

.144 

-145 

.146 

92.0 

-137 

.138 

.140 

.141 

.142 

•143 

.144 

.145 

.146 

.148 

92.5 

.138 

•139 

.141 

.142 

•143 

.144 

•145 

.146 

.148 

.149 

93.0 

-o.  139 

-O.I4I 

—  o.  142 

-0.143 

-0.144 

-0.145 

—0.146 

—  o.  148 

-0.149 

—0.150 

93-5 

.140 

.142 

.143 

.144 

•145 

.146 

.148 

.149 

.150 

.151 

94.0 

.142 

•143 

.144 

.145 

.146 

.147 

.149 

.150 

.151 

.152 

94-5 

-143 

.144 

.145 

.146 

.147 

.149 

.150 

.151 

.152 

•153 

.144 

•145 

.146 

.147 

.149 

.150 

.151 

.152 

-153 

•154 

95.5 

-0.145 

—  o.  146 

-0.147 

—0.148 

—0.150 

—O.I5I 

—0.152 

-0.153 

-0.154 

—0.156 

96.0 

.146 

.147 

.148 

.150 

.151 

.152 

•153 

.154 

.156 

-157 

96.5 

.147 

.148 

.149 

.151 

.152 

•153 

•  154 

.156 

.157 

.158 

97.0 

.148 

.149 

.150 

.152 

-153 

.154 

•155 

.157 

.158 

-159 

97-5 

.149 

.150 

.152 

-153 

.155 

•157 

.158 

•159 

.160 

98.0 

-0.150 

—0.151 

-0.153 

—  o.  154 

-a  155 

—0.156 

-0.158 

-0.159 

—  0.160 

—  0.161 

98.5 

.151 

•  153 

.154 

•155 

a56 

.158 

-159 

.160 

.161 

.163 

99.0 

.152 

-154 

.155 

.156 

.157 

•159 

.160 

.161 

.162 

.164 

99-5 

-153 

.155 

.156 

•157 

•  159 

.161 

.162 

.164 

-165 

100.0 

-154 

.156 

.157 

.158 

.160 

.161 

.162 

^63 

.165 

.166 

SMITHSONIAN  TABLES. 


21 


TABLE  10. 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

26.0 

26.2 

26.4 

26.6 

26.8 

27.0 

27.2 

27.4 

27.6 

27.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

0?0 

+0.068 

+0.068 

+0.069 

+0.069 

+0.070 

+0.070 

+0.071 

+0.071 

+0.072 

+0.072 

+0.5 

+0.067 

+0.067 

+0.068 

+0.068 

+0.069 

+0.069 

+0.070 

+0.070 

+0.071 

+0.071 

I.O 

.065 

.066 

.066 

.067 

.067 

.068 

.068 

.069 

.069 

.070 

1-5 

.064 

.065 

.065 

.066 

.066 

.067 

.067 

.068 

.068 

.069 

2.O 

.063 

.064 

.064 

.065 

.065 

.065 

.066 

.066 

.067 

.067 

2.5 

.062 

.062 

.063 

.063 

.064 

.064 

.065 

.065 

.066 

.066 

3.0 

+0.061 

+0.061 

+0.062 

+0.062 

+0.063 

+0.063 

+0.063 

+0.064 

+0.064 

+0.065 

3-5 

•059 

.060 

.060 

.061 

.061 

.062 

.062 

.063 

.063 

.064 

4.0 

.058 

.059 

•059 

.060 

.060 

.061 

.061 

.061 

.062 

.062 

4-5 

•057 

.058 

.058 

.058 

•059 

•059 

.060 

.060 

.061 

.061 

5-0 

.056 

.056 

•057 

•057 

.058 

.058 

.059 

•059 

•059 

.060 

5.5 

+0.055 

+0.055 

+0.056 

+0.056 

+0.056 

+0.057 

+0.057 

+0.058 

+0.058 

+0.059 

6.0 

.054 

•054 

•054 

•055 

•055 

.056 

.056 

.056 

•057 

•057 

6-5 

.052 

•053 

•053 

•054 

•054 

•054 

•055 

•055 

.056 

.056 

7.0 

.051 

.052 

.052 

.052 

-053 

•053 

•054 

•054 

.054 

•055 

7-5 

.050 

.050 

.051 

.051 

.052 

.052 

.052 

•053 

•053 

•053 

8.0 

+0.049 

+0.049 

+0.050 

+0.050 

+0.050 

+0.051 

+0.051 

+0.051 

+0.052 

+0.052 

8-5 

.048 

.048 

.048 

.049 

.049 

.049 

.050 

.050 

•051 

.051 

9.0 

.046 

.047 

.047 

.048 

.048 

.048 

.049 

.049 

.049 

.050 

9-5 

•045 

.046 

.046 

.046 

.047 

.047 

.047 

.048 

.048 

.048 

10.  0 

.044 

.044 

•045 

•045 

•045 

.046 

.046 

.046 

.047 

.047 

10.5 

+0.043 

+0.043 

+0.044 

+0.044 

+0.044 

+0.045 

+0.045 

+0.045 

+0.046 

+0.046 

I  I.O 

.042 

.042 

.042 

.043 

•043 

•043 

.044 

.044 

.044 

•045 

ii-5 

.041 

.041 

.041 

.041 

.042 

.042 

.042 

•043 

.043 

•043 

12.0 

•039 

.040 

.040 

.040 

.041 

.041 

.041 

.041 

.042 

.042 

12.5 

.038 

.038 

•039 

•039 

•039 

.040 

.040 

.040 

.040 

.041 

13.0 

+0.037 

+0.037 

fo.o38 

+0.038 

+0.038 

+0.038 

+0.039 

+0.039 

+0.039 

+0.040 

13-5 

.036 

.036 

.036 

•037 

•037 

.037 

•037 

.038 

.038 

.038 

14.0 

•  035 

•035 

•035 

-035 

.036 

.036 

.036 

.036 

•037 

•037 

14-5 

•033 

•034 

•034 

•034 

•034 

•035 

•035 

•035 

•035 

.036 

15-0 

.032 

.032 

•033 

.033 

•033 

-033 

•034 

•034 

•034 

•034 

15.5 

+0.031 

+0.031 

+0.032 

+0.032 

+0.032 

+0.032 

+0.032 

+0.033 

+0.033 

+0.033 

16.0 

.030 

.030 

.030 

.031 

.031 

.031 

.031 

.031 

.032 

.032 

16.5 

.029 

.029 

.029 

.029 

.030 

.030 

.030 

.030 

.030 

.031 

17.0 

.027 

.028 

.028 

.028 

.028 

.029 

.029 

.029 

.029 

.029 

17-5 

.026 

.027 

.027 

.027 

.027 

.027 

.028 

.028 

.028 

.028 

18.0 

+0.025 

+0.025 

+0.026 

+O.O26 

+0.026 

+0.026 

+0.026 

+0.026 

+0.027 

+0.027 

18.5 

.024 

.024 

.024 

.024 

.025 

.025 

.025 

.025 

•  025 

.026 

19.0 

.023 

.023 

.023 

.023 

.023 

.024 

.024 

.024 

.024 

.024 

19-5 

.022 

.022 

.022 

.022 

.022 

.022 

.023 

.023 

.023 

.023 

20.0 

.020 

.021 

.021 

.021 

.021 

.021 

.021 

.021 

.022 

.022 

20.5 

+O.OI9 

+0.019 

+0.020 

+O.O2O 

+0.020 

+0.020 

+O.O2O 

+O.O2O 

+O.O2O 

+0.021 

21.0 

.018 

.018 

.018 

.018 

.019 

.019 

.019 

.019 

.019 

.019 

21.5 

.017 

.017 

.017 

.017 

.017 

.017 

.018 

.018 

.018 

.018 

22.0 

.016 

.016 

.Ol6 

.016 

.016 

.Ol6 

.016 

.017 

.017 

.017 

22.5 

.014 

.015 

.015 

.015 

.015 

•  015 

.015 

.015 

.015 

.015 

23.0 

+0.013 

+0.013 

+0.014 

+0.014 

+0.014 

+0.014 

+0.014 

+0.014 

+0.014 

+0.014 

23-5 

.012 

.012 

.OI2 

.OI2 

.OI2 

.013 

.013 

.013 

.013 

.013 

24.0 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.012 

.012 

.012 

24-5 

.OIO 

.OIO 

.OIO 

.010 

.OIO 

.010 

.OIO 

.OIO 

.OIO 

.110 

25.0 

.009 

.OO9 

.009 

.009 

.009 

.009 

.009 

.009 

.OO9 

.009 

SMITHSONIAN  TABLES. 


22 


TABLE  10. 

REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

26.0 

26.2 

26.4 

26.6 

26.8 

27.0 

27.2 

27.4 

27.6 

27.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

25?5 

-0.007 

-ho.  007 

4-o.ooS 

-fo.ooS 

4-0.008 

4-0.008 

4-0.008 

4-0.008 

4-O.OoS 

4-0.008 

26.0 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

.007 

.007 

.007 

26.5 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

27.0 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

27-5 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

28.0 

-O.OOI 

4-0.001 

-1-0.002 

4-0.002 

-(-O.OO2 

4-0.002 

4-0.002 

4-0.002 

4-0.002 

4-0.002 

28.5 

0.000 

0.000 

0.000 

O.OOO 

O.OOO 

0.000 

0.000 

O.OOO 

O.OOO 

O.OOO 

29.0 

-O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

29-5 

.002 

.002 

.002 

.002 

.002 

.002 

.002 

.002 

.002 

.002 

30.0 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

30.5 

—0.004 

—0.004 

—O.OO4 

-0005 

—0.005 

—0.005 

-0.005 

-0.005 

—0.005 

—0.005 

31.0 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

3*-5 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

32.0 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

.009 

32.5 

.009 

.009 

.009 

.009 

.009 

.009 

.010 

.010 

.010 

.010 

33.0 

—  0.010 

—  0.010 

—  0.010 

—  O.OII 

—O.OII 

—O.OII 

—O.OII 

—O.OII 

—O.OII 

—O.OII 

33-5 

.Oil 

.012 

.012 

.012 

.012 

.012 

.012 

.012 

.012 

.012 

34-o 

.013 

.013 

.013 

.013 

.013 

.013 

.013 

.013 

.013 

.014 

34-5 

.014 

.014 

.014 

.014 

.014 

.014 

.014 

.015 

.015 

.015 

35.o 

.015 

.015 

.015 

.015 

.015 

.016 

.016 

.016 

.Ol6 

.Ol6 

35.5 

—  0.016 

—  0.016 

—  0.016 

—0.017 

—0.017 

—0.017 

—0.017 

—0.017 

—0.017 

—0.017 

36.0 

.017 

.018 

.018 

.018 

.018 

.018 

.018 

.018 

.018 

.019 

36.5 

.019 

.019 

.019 

.019 

.019 

.019 

.019 

.020 

.O2O 

.O2O 

37-0 

.020 

.020 

.020 

.020 

.O2O 

.021 

.021 

.O2I 

.O2I 

.021 

37-5 

.021 

.021 

.O2I 

.O2I 

.022 

.022 

.022 

.022 

.022 

.022 

38.0 

—  O.O22 

—  O.O22 

—0.022 

—0.023 

—0.023 

—0.023 

—0.023 

—0.023 

—0.023 

—O.O24 

38.5 

.023 

.023 

.024 

.024 

.024 

.024 

.024 

.025 

.025 

.025 

39-o 

.024 

.025 

.025 

.025 

.025 

.025 

.026 

.026 

.026 

.026 

39-5 

.026 

.026 

.026 

.026 

.026 

.027 

.027 

.027 

.027 

.027 

40.0 

.027 

.027 

.027 

.027 

.028 

.028 

.028 

.028 

.028 

.029 

40.5 

—0.028 

—0.028 

—0.028 

—O.O29 

—O.O29 

—0.029 

—0.029 

—0.030 

—O.O3O 

—0.030 

41.0 

.029 

.029 

.030 

.030 

.030 

.030 

.031 

.031 

.031 

.031 

41-5 

.030 

.031 

.031 

.031 

.031 

.032 

.032 

.032 

.032 

.032 

42.0 

.032 

.032 

.032 

.032 

•033 

•033 

•033 

•033 

•033 

•034 

42.5 

•033 

•033 

•033 

•033 

•034 

•034 

•034 

•034 

•035 

•035 

43.0 

-0.034 

-0.034 

-0.034 

-0.035 

-0.035 

-0.035 

-0.035 

—0.036 

—0.036 

—0.036 

43-5 

.035 

•035 

.036 

.036 

.036 

.036 

.037 

•037 

•037 

•037 

44.0 

.036 

•037 

•037 

•037 

.037 

.038 

.038 

.038 

.038 

•039 

44-5 

•037 

.038 

.038 

.038 

•039 

•039 

•039 

•039 

.040 

.040 

45-0 

•039 

•039 

•039 

•039 

.040 

.040 

.040 

.041 

.041 

.041 

45.5 

—0.040 

—0.040 

—0.040 

—0.041 

—O.O4I 

—0.041 

—0.042 

—0.042 

—0.042 

-0.043 

46.0 

.041 

.041 

.042 

.042 

.042 

•043 

•043 

•043 

•043 

.044 

46.5 

.042 

.042 

•043 

•043 

•043 

.044 

.044 

.044 

•045 

•045 

47.0 

•043 

.044 

.044 

.044 

•045 

•045 

•045 

.046 

.046 

.046 

47-5 

.045 

•045 

•045 

.046 

.046 

.046 

.047 

.047 

.047 

.048 

48.0 

-0.046 

—0.046 

—0.046 

-0.047 

-0.047 

-0.047 

—O.O48 

—0.048 

—0.048 

—0.049 

48.5 

.047 

.047 

.048 

.048 

.048 

.049 

.049 

.049 

.050 

.050 

49.0 

.048 

.048 

.049 

.049 

.049 

.050 

.050 

.051 

.051 

.051 

49-5 

.049 

.050 

.050 

.050 

.051 

.051 

.051 

.052 

.052 

•053 

50.0 

.050 

.051 

.051 

.052 

.052 

.052 

•053 

•053 

•053 

•054 

SMITHSONIAN  TABLES. 


TABLE  10. 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

26.0 

26.2 

26.4 

26.6 

26.8 

27.0 

27.2 

27.4 

27.6 

27.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

50?5 

-0.052 

—0.052 

—0.052 

-0.053 

-0.053 

-0.054 

-0.054 

-0.054 

-0.055 

-0.055 

51-0 

•053 

•053 

•054 

•054 

•054 

•055 

•055 

.056 

.056 

.056 

5i-5 

•054 

•054 

•055 

•055 

.056 

.056 

.056 

.057 

•057 

.058 

52.0 

•055 

•055 

.056 

.056 

•057 

•057 

.058 

.058 

.058 

•059 

52.5 

.056 

•057 

•057 

.058 

.058 

.058 

•059 

•059 

.060 

.060 

53.0 

-0.057 

-0.058 

—0.058 

-0.059 

-0.059 

—O.o6o 

—O.o6o 

—  0.061 

—  0.061 

—O.o6  1 

53-5 

•059 

•059 

•059 

.060 

.060 

.O6l 

.061 

.062 

.062 

.063 

54-o 

.060 

.060 

.061 

.061 

.062 

.062 

.063 

•063 

.063 

.064 

54-5 

.061 

.061 

.062 

.062 

.063 

.063 

.064 

.064 

.065 

.065 

55-0 

.062 

.063 

.063 

.064 

.064 

.064 

.065 

.065 

.066 

.066 

55.5 

-0.063 

—0.064 

—0.064 

—0.065 

—0.065 

—O.o66 

-0.066 

—0.067 

—0.067 

—0.068 

56.0 

.064 

.065 

-065 

.066 

.066 

.067 

.067 

.068 

.068 

.069 

56.5 

.066 

.066 

.067 

.067 

.068 

.068 

.069 

.069 

.070 

.070 

57-0 

.067 

.067 

.068 

.068 

.069 

.069 

.070 

.070 

.071 

.071 

57-5 

.068 

.069 

.069 

.070 

.070 

.071 

.071 

.072 

.072 

•073 

58.0 

—0.069 

—0.070 

—0.070 

—0.071 

—0.071 

—0.072 

—0.072 

-0.073 

-0.073 

-0.074 

58.5 

.070 

.071 

.071 

.072 

.072 

•073 

.074 

.074 

•075 

•075 

59-o 

.072 

.072 

•073 

•073 

.074 

.074 

•075 

.075 

.076 

.076 

59-5 

•073 

•073 

.074 

.074 

•075 

.075 

.076 

.077 

.077 

.078 

60.0 

.074 

.074 

•075 

.076 

.076 

.077 

.077 

.078 

'    ,078 

.079 

60.5 

-0.075 

—0.076 

—0.076 

-0.077 

-0.077 

—0.078 

-0.078 

-0.079 

—0.080 

—0.080 

61.0 

.076 

.077 

.077 

.078 

.079 

.079 

.080 

.080 

.081 

.081 

61.5 

.077 

.078 

.079 

.079 

.080 

.080 

.081 

.082 

.082 

.083 

62.0 

.079 

.079 

.080 

.080 

.081 

.082 

.082 

.083 

.083 

.084 

62.5 

.080 

.080 

.O8l 

.082 

.082 

.083 

.083 

.084 

.085 

.085 

63.0 

-O.oSl 

—0.082 

—O.o82 

-0.083 

—0.083 

—0.084 

-0.085 

—0.085 

-0.086 

-0.086 

63.5 

.082 

.083 

.083 

.084 

.085 

.085 

.086 

.086 

.087 

.088 

64.0 

.083 

.084 

.085 

.085 

.086 

.086 

.087 

.088 

.088 

.089 

64-5 

.084 

.085 

.086 

.086 

.087 

.088 

.088 

.089 

.090 

.090 

65.0 

.086 

.086 

.087 

.088 

.088 

.089 

.090 

.090 

.091 

.092 

65.5 

—0.087 

—0.087 

-0.088 

—0.089 

—0.089 

—0.090 

—0.091 

—0.091 

—0.092 

-0.093 

66.0 

.088 

.089 

.089 

.090 

.091 

.091 

.092 

•093 

•093 

.094 

66.5 

.089 

.090 

.090 

.091 

.092 

•093 

•093 

.094 

•095 

.095 

67.0 

.090 

.091 

.092 

.092 

•093 

.094 

.094 

.095 

.096 

.097 

67.5 

.092 

.092 

•093 

.094 

.094 

•095 

.096 

.096 

.097 

.098 

68.0 

-0.093 

-0.093 

-0.094 

-0.095 

-0.095 

—0.096 

-0.097 

—0.098 

—0.098 

-0.099 

68.5 

.094 

•095 

•095 

.096 

.097 

.097 

.098 

.099 

.100 

.100 

69.0 

.095 

.096 

.096 

.097 

.098 

.099 

.099 

.100 

.101 

.102 

69-5 

.096 

.097 

.098 

.098 

.099 

.100 

.IOI 

.101 

.102 

.103 

70.0 

.097 

.098 

.099 

.100 

.100 

.101 

.IO2 

.103 

•  103 

.104 

70.5 

-0.098 

-0.099 

—  0.100 

—  O.IOI 

—O.IOI 

—  0.  102 

-0.103 

—  o.  104 

—0.105 

—o.  105 

71.0 

.100 

.IOO 

.101 

.102 

.103 

.103 

.104 

.105 

.106 

.107 

71-5 

.101 

.102 

.102 

.103 

.104 

.105 

.105 

.106 

.107 

.108 

72.0 

.102 

.103 

.IO4 

.104 

.105 

.106 

.107 

.107 

.108 

.109 

72.5 

.103 

.104 

.105 

.106 

.106 

.107 

.108 

.109 

.109 

.110 

73.0 

—  o.  104 

—0.105 

—  o.  106 

—  o.  107 

—0.108 

—  o.  108 

—0.109 

—O.I  10 

—  O.III 

—O.I  12 

73-5 

.105 

.106 

.107 

.108 

.109 

.110 

.110 

.III 

.112 

•113 

74-0 

.107 

.107 

.108 

.109 

.110 

.III 

.112 

.112 

•113 

.114 

74-5 

.108 

.109 

.109 

.110 

.III 

.112 

•113 

.114 

114 

•US 

75-0 

.109 

.110 

.in 

.112 

.112 

.113 

.114 

•US 

116 

.117 

SMITHSONIAN  TABLES. 


TABLE  10 

REDUCTION   OF  THE   BAROMETER    TO  STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OP  THE  BAROMETER  IN  INCHES. 

26.0 

26.2 

26.4 

26.6 

26.8 

27.0 

27.2 

27.4 

27.6 

27.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

75?5 

—  O.IIO 

—  O.III 

—O.I  12 

-O.II3 

—0.114 

—O.II4 

—O.II5 

—  0.116 

—0.117 

—O.IlS 

76.0 

.III 

.112 

•I][3 

.114 

•II5 

.116 

.116 

.117 

.118 

.119 

76.5 

•113 

•I]C3 

.114 

•US 

.116 

.117 

.118 

.119 

.119 

.120 

77.0 

.114 

•US 

.116 

.117 

.118 

.119 

.120 

.121 

.122 

77-5 

•US 

.116 

.117 

.117 

.118 

.119 

.120 

.121 

.122 

.123 

78.0 

—  0.116 

—0.117 

—0.118 

—O.II9 

—0.120 

—O.I  2O 

—  O.I2I 

—0.122 

—0.123 

—0.124 

78.5 

.117 

.118 

.119 

.120 

.121 

.122 

.123 

.123 

.124 

.125 

79.0 

.118 

.119 

.120 

.121 

.122 

.123 

.124 

•  125 

.126 

.127 

79-5 

.120 

.I2O 

.121 

.122 

.123 

.124 

.125 

.126 

.127 

.128 

80.0 

.121 

.122 

.123 

.123 

.124 

.125 

.126 

.127 

.128 

.129 

80.5 

—  O.I22 

-0.123 

—O.I24 

—0.125 

—0.126 

—0.127 

—0.127 

—0.128 

—0.129 

-0.130 

81.0 

.123 

.124 

•125 

.126 

.127 

.128 

.129 

.130 

.131 

.132 

81.5 

.124 

.125 

.126 

.127 

.128 

.129 

.130 

.I^I 

.132 

•133 

82.0 

•  125 

.126 

.127 

.128 

.129 

.130 

.132 

•133 

•134 

82.5 

.127 

.128 

.128 

.129 

.130 

.132 

•133 

.134 

•135 

83.0 

-0.128 

—0.129 

—0.130 

—O.I3I 

—0.132 

-0.133 

-0.134 

-0.135 

—0.136 

-0.137 

83-5 

.129 

.130 

.13! 

.132 

•133 

•134 

.135 

.136 

•137 

.138 

84.0 

.130 

.132 

•133 

•134 

•135 

.136 

.137 

.138 

•139 

84.5 

.     .132 

•133 

•134 

•135 

.136 

.137 

.138 

•139 

.140 

85.0 

.132 

•133 

.134 

•135 

.136 

•137 

.138 

•139 

.141 

.142 

85.5 

-0.134 

-0.135 

—  o.  136 

-0.137 

-0.138 

-0.139 

—  o.  140 

—  o.  141 

—0.142 

-0.143 

86.0 

•135 

.136 

•137 

.138 

•139 

.140 

.141 

.142 

•143 

.144 

86.5 

.136 

•137 

.138 

•139 

.140 

.141 

.142 

•143 

.144 

•145 

87.0 

•137 

.138 

•139 

.140 

.141 

.142 

•143 

.144 

•145 

.147 

87-5 

.138 

•139 

.140 

.141 

.142 

.144 

•145 

.146 

.147 

.148 

88.0 

-0.139 

—  o.  140 

—O.I42 

-0.143 

-0.144 

-0.145 

—  o.  146 

-0.147 

—  o.  148 

-0.149 

88.5 

.141 

.142 

•143 

.144 

•145 

.146 

.147 

.148 

.149 

•  ISO 

89.0 

.142 

•143 

.144 

•145 

.146 

.147 

.148 

.149 

.150 

.152 

89-5 

•143 

.144 

•145 

.146 

.147 

.148 

.149 

.151 

.152 

•153 

90.0 

.144 

•145 

.146 

.147 

.148 

.150 

.151 

.152 

•153 

•154 

90.5 

-0.145 

—  o.  146 

-0.147 

—  o.  149 

—0.150 

—O.I5I 

—0.152 

-0.153 

-0.154 

-0.155 

91.0 

.146 

.147 

.149 

.150 

.151 

.152 

.153 

•154 

•155 

•157 

91.5 

.148 

.149 

.150 

.151 

.152 

•153 

.154 

•155 

•157 

.158 

92.0 
92-5 

.149 
.150 

.150 
.151 

.152 

.152 
•153 

•153 
•154 

•154 
.156 

.156 
.157 

'.III 

.158 
•159 

•159 
.160 

93.0 

-O.I5I 

-0.152 

-0.153 

-0.155 

—  o.  156 

-0.157 

-0.158 

-0.159 

—O.I  60 

—  0.161 

93-5 

.152 

.153 

•155 

.156 

•157 

.158 

•159 

.160 

.162 

.163 

94.0 

•153 

.155 

.156 

•157 

.158 

•159 

.160 

.162 

.163 

.164 

94-5 

•155 

.156 

•157 

.158 

•159 

.160 

.162 

.163 

.164 

.165 

95-0 

.156 

.157 

.158 

•159 

.160 

.162 

.163 

.164 

.165 

.166 

95.5 

-0.157 

-0.158 

-0.159 

—  0.160 

—O.l62 

-O.I63 

—  o.  164 

—0.165 

—0.167 

—  0.168 

96.0 

.158 

•I59 

.160 

.162 

.163 

.164 

.165 

.I67 

.168 

.169 

96.5 

•159 

.160 

.162 

.163 

.164 

.165 

.167 

.168 

.169 

.170 

97.0 

.160 

.162 

.163 

.164 

.165 

.I67 

.168 

.169 

.170 

.171 

97-5 

.162 

.163 

.164 

.165 

.166 

.168 

.169 

.170 

.171 

•173 

98.0 

-0.163 

—0.164 

—O.l65 

-0.166 

—o.  168 

—0.169 

—0.170 

—O.I7I 

-0.173 

-0.174 

98.5 

.164 

.165 

.166 

.168 

.169 

.170 

.171 

•173 

.174 

•175 

99.0 

.165 

.166 

.168 

.169 

,170 

.171 

.173 

.174 

.175 

.176 

99-5 

.166 

.167 

.I69 

.170 

.171 

•173 

.174 

•175 

.176 

.178 

IOO.O 

.167 

.169 

.170 

.171 

.172 

.174 

.175 

.176 

.178 

.179 

SMITHSONIAN  TABLES. 


TABLE    10. 
REDUCTION    OF  THE    BAROMETER   TO   STANDARD    TEMPERATURE. 

ENGLISH     MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE   BAROMETER   IN   INCHES. 

28.0 

28.2 

28.4 

28.6 

28.8 

29.  0 

29.2 

29.4 

29.6 

29.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

0?0 

4-0.073 

+0.074 

+0.074 

+0.075 

+0.075 

+0.076 

+0.076 

+0.077 

+0.077 

+0.078 

+0.5 

H-0.072 

+0.072 

+0.073 

+0.073 

+0.074 

+0.074 

+0.075 

+0.075 

+0.076 

+0.076 

I.O 

.070 

.071 

.071 

.072 

.072 

.073 

•073 

.074 

.074 

•075 

i-5 

.069 

.070 

.070 

.071 

.071 

.072 

.072 

.073 

.073 

.074 

2.0 

.068 

.068 

.069 

.069 

.070 

.070 

.071 

.071 

.072 

.072 

2-5 

.067 

.067 

.068 

.068 

.069 

.069 

.069 

.070 

.070 

.071 

3.0 

+0.065 

+0.066 

+0.066 

+0.067 

+0.067 

+0.068 

+0.068 

+0.069 

+0.069 

+0.070 

3-5 

.064 

•  065 

.065 

•065 

.066 

.066 

.067 

.067 

.068 

.068 

4.0 

•063 

•063 

.064 

.064 

.065 

.065 

.065 

.066 

.066 

.067 

4-5 

.062 

.062 

.062 

.063 

•063 

.064 

.064 

.065 

•  065 

.065 

5-0 

.060 

.061 

.061 

.062 

.062 

.062 

•063 

.063 

.064 

.064 

5.5 

+0.059 

+0.059 

+0.o6o 

+O.o6o 

+0.061 

+0.061 

+0.062 

+0.062 

+0.062 

+0.063 

6.0 

.058 

.058 

•059 

•059 

•059 

.060 

.060 

.061 

.061 

.061 

6.5 

.056 

•057 

.057 

.058 

.058 

.058 

•059 

•059 

.060 

.060 

7.0 

•055 

.056 

.056 

.056 

•057 

•057 

•057 

.058 

.058 

•059 

7-5 

•054 

•054 

•055 

•055 

•055 

.056 

.056 

•057 

.057 

•057 

8.0 

+0.053 

+0.053 

+0.053 

+0.054 

+0.054 

+0.054 

+0.055 

+0.055 

+0.056 

+0.056 

8-5 

.051 

.052 

.052 

.052 

•053 

•053 

•053 

•054 

•054 

.055 

9.0 

.050 

.050 

.051 

.051 

.051 

.052 

.052 

•053 

•053 

•053 

9-5 

.049 

.049 

.049 

.050 

.050 

.050 

.051 

.051 

.052 

.052 

IO.O 

.047 

.048 

.048 

.048 

.049 

.049 

.050 

.050 

.050 

.051 

10.5 

fO.046 

+0.047 

+0.047 

+0.047 

+0.048 

+0.048 

+0.048 

+0.049 

+0.049 

+  0.049 

II.  0 

.045 

•045 

.046 

.046 

.046 

.047 

.047 

.047 

.047 

.048 

ii-5 

.044 

.044 

.044 

•045 

•045 

•045 

.046 

.046 

.046 

.046 

12.0 

.042 

-043 

-043 

•043 

.044 

.044 

.044 

.044 

.045 

-045 

12.5 

.041 

.041 

.042 

.042 

.042 

•043 

•043 

.043 

.043 

.044 

13.0 

+0.040 

+0.040 

+0.040 

+0.041 

+0.041 

+0.041 

+0.042 

+0.042 

+0.042 

+0.042 

13-5 

•039 

•039 

•039 

•039 

.040 

.040 

.040 

.040 

.041 

.041 

14.0 

•037 

.038 

.038 

.038 

.038 

•039 

•039 

-039 

•039 

.040 

14.5 

.036 

•036 

•037 

•037 

•037 

•037 

.038 

.038 

.038 

.038 

15.0 

•035 

•035 

•035 

•035 

.036 

.036 

.036 

.036 

•037 

•037 

15.5 

+0.033 

+0.034 

+0.034 

+0.034 

+0.034 

+0.035 

+0.035 

+0.035 

+0.035 

+0.036 

16.0 

.032 

.032 

•033 

.033 

•033 

•033 

•034 

•034 

•034 

•034 

16.5 

.031 

.031 

.031 

.032 

.032 

.032 

.032 

.032 

•033 

.033 

17.0 

.030 

.030 

.030 

.030 

.030 

.031 

.031 

.031 

.031 

.032 

17-5 

.028 

.029 

.029 

.029 

.029 

.029 

.030 

.030 

.030 

.030 

18.0 

+0.027 

+0.027 

+0.027 

+0.028 

+0.028 

+0.028 

+0.028 

+0.028 

+0.029 

+0.029 

18.5 

.026 

.026 

.026 

.026 

.027 

.027 

.027 

.027 

.027 

.027 

19.0 

.025 

.025 

.025 

.025 

.025 

.025 

.026 

.026 

.026 

.026 

19-5 

.023 

.023 

.024 

.024 

.024 

.024 

.024 

.024 

.025 

.025 

20.  o 

.022 

.022 

.022 

.022 

.023 

.023 

.023 

.023 

.023 

.023 

20.5 

+O.O2I 

+O.O2I 

+O.O2I 

+0.021 

+O.O2I 

+O.O2I 

+O.O22 

+0.022 

+0.022 

+0.022 

21.  0 

.019 

.020 

.020 

.O2O 

.O2O 

.O2O 

.O2O 

.020 

.021 

.O2I 

2L5 

.018 

.018 

.018 

.019 

.OI9 

.OI9 

.019 

.019 

.019 

.019 

22.  0 

.017 

.017 

.017 

.017 

.017 

.017 

.018 

.018 

.018 

^.01  8 

22.5 

.016 

.Ol6 

.016 

.Ol6 

.016 

.016 

.016 

.Ol6 

.Ol6 

'.017 

23.0 

+O.OI4 

+0.014 

+0.015 

+0.015 

+0.015 

+0.015 

+0.015 

+0.015 

+0.015' 

+0.015 

23-5 

.013 

.013 

.013 

.013 

.013 

.014 

.014 

.014 

.OI4 

.014 

24.0 

.012 

.012 

.012 

.012 

.012 

.012 

.012 

.OI2 

.OI2 

.013 

24-5 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

25.0 

.009 

.009 

.009 

.009 

.009 

.OIO 

.OIO 

.OIO 

.OIO 

.010 

SMITHSONIAN  TABLES. 


26 


TABLE  10. 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER  IN   INCHES. 

28.0 

28.2 

28.4 

28.6 

28.8 

29.0 

29.2 

29.4 

29.6 

29.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

25?5 

-f-o.oo8 

-1-0.008 

+0.008 

+0.008 

+0.008 

+0.008 

+0.008 

+0.008 

+0.008 

+0.008 

26.0 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

26.5 

.005 

•  005 

.005 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

27.0 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

27-5 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

28.0 

hO.  002 

+  0.002 

+0.002 

+0.002 

+O.OO2 

+O.OO2 

+O.OO2 

+0.002 

+0.002 

+O.OO2 

28.5 

0.000 

O.OOO 

0.000 

O.OOO 

O.OOO 

O.OOO 

0.000 

0.000 

0.000 

O.OOO 

29.0 

—  0.001 

—  O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

29-5 

.002 

.002 

.OO2 

.002 

.002 

.002 

.002 

.OO2 

.OO2 

.002 

30.0 

.003 

.004 

.004 

.004 

.OO4 

.OO4 

.OO4 

.OO4 

.OO4 

.004 

30.5 

-0.005 

—0.005 

—0.005 

—0.005 

—0.005 

—0.005 

—0.005 

—0.005 

—0.005 

—0.005 

31.0 

.006 

.006 

.OO6 

.006 

.006 

.006 

.OO6 

.OO6 

.006 

.OO6 

31-5 

.007 

.007 

.007 

.007 

.008 

.008 

.008 

.008 

.008 

.008 

32.0 

.009 

.009 

.009 

.009 

.009 

.009 

.009 

009 

.OO9 

.009 

32.5 

.010 

.OIO 

.010 

.OIO 

.OIO 

.OIO 

.OIO 

.010 

.010 

.OIO 

33.0 

—  O.OII 

—O.OII 

—O.OII 

—O.OII 

—O.OII 

—0.012 

—0.012 

—  O.OI2 

—  O.OI2 

—0.012 

33-5 

.012 

.012 

.013 

.013 

.013 

.013 

.013 

.013 

.013 

.013 

34-0 

.014 

.014 

.014 

.014 

.014 

.OI4 

.OI4 

.OI4 

.OI4 

.015 

34-5 

.015 

.015 

.015 

.015 

.015 

.015 

.Ol6 

.016 

.016 

.016 

35-o 

.016 

.Ol6 

.016 

.017 

.017 

.017 

.017 

.017 

.017 

.017 

35.5 

—0.017 

—O.OlS 

—  0.018 

—0.018 

—0.018 

—  O.OlS 

—O.OlS 

—0.018 

—O.OlS 

—  O.OI9 

36.0 

.019 

.OI9 

.019 

.019 

.019 

.019 

.O2O 

.O2O 

.O2O 

.020 

36.5 

.020 

.020 

.020 

.020 

.021 

.021 

.O2I 

.O2I 

.021 

.021 

37-0 

.021 

.021 

.022 

.022 

.022 

.022 

.022 

.022 

.022 

.023 

37-5 

.023 

.023 

.023 

.023 

.023 

.023 

.024 

.024 

.024 

.024 

38.0 

—0.024 

—O.O24 

—O.O24 

—O.O24 

—0.024 

—0.025 

—0.025 

—0.025 

—0.025 

—  0.025 

38.5 

.025 

.025 

.025 

.026 

.026 

.026 

.026 

.026 

.027 

.027 

39-° 

.026 

.027 

.027 

.027 

.027 

.027 

.027 

.028 

.028 

.028 

39-5 

.028 

.028 

.028 

.028 

.028 

.029 

.029 

.029 

.029 

.029 

40.0 

.029 

.029 

.029 

.030 

.030 

.030 

.030 

.030 

.031 

.031 

40.5 

-0.030 

-0.030 

—0.031 

—  0.031 

-0.031 

—0.031 

—0.031 

—0.032 

—0.032 

—O.O32 

41.0 

.031 

.032 

.032 

.032 

.032 

•033 

•033 

•033 

•033 

•033 

41-5 

•033 

•033 

•033 

•033 

•034 

•034 

•034 

•034 

•035 

•035 

42.0 

.034 

•034 

.034 

•035 

-035 

•035 

.035 

.036 

.036 

.036 

42.5 

.035 

•035 

.036 

.036 

.036 

.036 

•037 

•037 

•037 

•037 

43.0 

-0.036 

—0.037 

—0.037 

-0.037 

—0.038 

—0.038 

—0.038 

—0.038 

-0.039 

-0.039 

43-5 

.038 

.038 

.038 

•039 

•039 

•039 

•039 

.040 

.040 

.040 

44.0 

.039 

•039 

.040 

.040 

.040 

.040 

.041 

.O4I 

.O4I 

.042 

44-5 

.040 

.041 

.O4I 

.O4I 

.041 

.042 

.042 

.042 

-043 

•043 

45-0 

.042 

.042 

.042 

.042 

•043 

•043 

•043 

.044 

.044 

.044 

45.5 

-0.043 

-0.043 

-0.043 

—0.044 

-0.044 

—O.O44 

-0.045 

-0.045 

—0.045 

—0.046 

46.0 

.044 

.044 

•045 

•045 

•045 

.046 

.046 

.046 

.047 

.047 

46.5 

.045 

.046 

.046 

.046 

.047 

.047 

.047 

.048 

.048 

.048 

47.0 

.047 

.047 

.047 

.048 

.048 

.048 

.049 

.049 

.049 

.050 

47-5 

.048 

.048 

.049 

.049 

.049 

.050 

.050 

.050 

.051 

.051 

48.0 

—0.049 

-0.050 

—0.050 

-0.050 

-0.051 

—0.051 

—0.051 

—0.052 

—0.052 

—0.052 

48.5 

.050 

.051 

.051 

.052 

.052 

.052 

•053 

•053 

•053 

•054 

49.0 

.052 

.052 

.052 

•053 

•053 

•054 

•054 

.054 

•055 

•055 

49-5 

.053 

•053 

.054 

•054 

•054 

•055 

•055 

.056 

.056 

.056 

50.0 

.054 

•055 

.055 

•055 

.056 

.056 

•057 

•057 

•057 

.058 

SMITHSONIAN  TABLES. 


TABLE  10. 
REDUCTION    OF  THE    BAROMETER    TO    STANDARD  TEMPERATURE, 

ENGLISH    MEASURES. 


Attache 
Ther- 
momete 
Fahren 
heit. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

28.0 

28.2 

28.4 

28.6 

28.8 

29.0 

29.2 

29.4 

29.6 

29.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

50?5 

-0.055 

—0.056 

—0.056 

-0.057 

-0.057 

-0.057 

-0.058 

—0.058 

-0.059 

-0.059 

51.0 

•057 

.057 

.058 

.058 

.058 

•059 

•059 

.060 

.060 

.060 

51.5 

.058 

.058 

•059 

•059 

.060 

.060 

.061 

.061 

.061 

.062 

52.0 

•059 

.060 

.060 

.061 

.061 

.061 

.062 

.062 

.063 

.063 

52.5 

.061 

.061 

.061 

.062 

.062 

.063 

•063 

.064 

.064 

.064 

53.0 

—0.062 

—0.062 

—0.063 

-0.063 

—0.064 

—0.064 

—0.064 

-0.065 

-0.065 

—O.o66 

53-5 

•063 

.064 

.064 

.064 

.065 

.065 

.066 

.066 

.067 

.067 

54-0 

.064 

•065 

.065 

.066 

.066 

.067 

.067 

.068 

.068 

.068 

54-5 

.066 

.066 

.067 

.067 

.067 

.068 

.068 

.069 

.069 

.070 

55-0 

.067 

.067 

.068 

.068 

.069 

.069 

.070 

.070 

.071 

.071 

55.5 

-0.068 

—0.069 

—0.069 

—0.070 

—0.070 

—0.071 

—0.071 

—0.072 

—0.072 

-0.073 

56.0 

.069 

.070 

.070 

.071 

.071 

.072 

.072 

•073 

•073 

.074 

56.5 

.071 

.071 

.072 

.072 

•073 

•073 

.074 

.074 

•075 

.075 

57-o 

.072 

.072 

•073 

•073 

.074 

•075 

•075 

.076 

.076 

.077 

57-5 

•073 

.074 

.074 

•075 

•075 

.076 

.076 

.077 

.077 

.078 

58.0 

-0.074 

-0.075 

—0.076 

—0.076 

-0.077 

-0.077 

—0.078 

—0.078 

-0.079 

-0.079 

58.5 

.076 

.076 

.077 

.077 

.078 

.078 

.079 

.080 

.080 

.081 

59-o 

.077 

.078 

.078 

.079 

.079 

.080 

.080 

.081 

.081 

.082 

59-5 

.078 

.079 

.079 

.080 

.081 

.081 

.082 

.082 

•083 

.083 

60.0 

.080 

.080 

.081 

.O8l 

.082 

.082 

.083 

.084 

.084 

.085 

60.5 

—O.oSl 

—0.081 

—0.082 

—0.083 

—0.083 

—0.084 

—0.084 

-0.085 

-0.085 

-0.086 

61.0 

.082 

.083 

.083 

.084 

.084 

.085 

.086 

.086 

.087 

.087 

6i.5 

.083 

.084 

.085 

•085 

.086 

.086 

.087 

.087 

.088 

.089 

62.0 

.085 

.085 

.086 

.086 

.087 

.088 

.088 

.089 

.089 

.090 

62.5 

.086 

.086 

.087 

.088 

.088 

.089 

.090 

.090 

.091 

.091 

63.0 

—0.087 

-0.088 

-0.088 

—0.089 

—0.090 

—0.090 

—0.091 

—0.091 

—0.092 

-0.093 

63.5 

.088 

.089 

.090 

.090 

.091 

.092 

.092 

•093 

•093 

.094 

64.0 

.090 

.090 

.091 

.092 

.092 

•093 

•093 

.094 

•095 

•095 

64-5 

.091 

.092 

.092 

•093 

•093 

.094 

•095 

•095 

.096 

.097 

65.0 

.092 

•093 

•093 

.094 

.095 

•095 

.096 

.097 

.097 

.098 

65.5 

-0.093 

-0.094 

-0.095 

-0.095 

—0.096 

-0.097 

-0.097 

—0.098 

-0.099 

-0.099 

66.0 

.095 

•095 

.096 

.097 

.097 

.098 

.099 

.099 

.100 

.101 

66.5 

.096 

.097 

.097 

.098 

.099 

.099 

.100 

.101 

.101 

.IO2 

67.0 

.097 

.098 

.099 

.099 

.100 

.101 

.101 

.102 

.103 

.103 

67.5 

.098 

.099 

.IOO 

.101 

.101 

.102 

.103 

.103 

.104 

.105 

68.0 

-O.IOO 

-O.IOO 

—  O.IOI 

—  O.  IO2 

—  o.  103 

-0.103 

—  o.  104 

—  o.  105 

-o.  105 

—  0.106 

68.5 

.101 

.102 

.102 

•103 

.104 

.105 

.105 

.106 

.107 

.107 

69.0 

.102 

.103 

.104 

.104 

.105 

.106 

.107 

.107 

.108 

.109 

69-5 

.104 

.IO4 

.105 

.106 

.106 

.107 

.108 

.109 

.109 

.110 

70.0 

.105 

.106 

.106 

.107 

.108 

.109 

.109 

.HO 

.III 

.112 

70.5 

-o.  106 

—  o.  107 

-0.108 

-0.108 

—0.109 

—  O.IIO 

—  O.III 

-O.III 

—O.I  12 

-O.II3 

71.0 

.107 

.108 

.109 

.110 

.110 

.III 

.112 

•113 

•113 

.114 

71.5 

.109 

.109 

.HO 

.III 

.112 

.112 

•113 

.114 

•115 

.116 

72.0 

.110 

.III 

.III 

.112 

•113 

.114 

•US 

•US 

.116 

.117 

72.5 

.III 

.112 

•113 

•113 

.114 

•US 

.116 

.117 

.117 

.118 

73.0 

-O.I  12 

-O.II3 

-O.II4 

-O.II5 

-0.116 

-0.116 

-O.II7 

-O.II8 

-O.II9 

-0.120 

73-5 

.114 

.114 

.115 

.116 

.117 

.118 

.118 

.II9 

.120 

.121 

74-0 

•US 

.116 

.117 

.117 

.118 

.119 

.120 

.121 

.121 

.122 

74-5 

.116 

.117 

.118 

.119 

.119 

.120 

.121 

.122 

.123 

.124 

75-0 

.117 

.118 

.119 

.120 

.121 

.122 

.122 

.123 

.124 

•125 

SMITHSONIAN  TABLES. 


28 


TABLE    10. 
REDUCTION    OF  THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

28.0 

28.2 

28.4 

28.6 

28  8 

29.O 

29.2 

29.4 

29.6 

29.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

75?5 

—0.119 

—0.119 

—0.120 

—  O.I2I 

—0.122 

—0.123 

—0.124 

—0.125 

—  o.  125 

—0.126 

76.0 

.120 

.121 

.122 

.122 

.123 

.124 

.125 

.126 

.127 

.128 

76.5 

.121 

.122 

.123 

.124 

.125 

•125 

.126 

.127 

.128 

.129 

77.0 

.122 

.123 

.124 

.125 

.126 

.127 

.128 

.129 

.129 

.130 

77-5 

.124 

•125 

•125 

.126 

.127 

.128 

.129 

.130 

.131 

.132 

78.0 

-o.  125 

—O.I26 

—O.127 

—  0.  1  28 

—0.129 

—  o.  129 

-0.130 

—0.131 

—0.132 

-0.133 

78.5 

.126 

.127 

.128 

.129 

.130 

.131 

.132 

•133 

•133 

•134 

79.0 

.127 

.128 

.129 

.130 

•131 

.132 

•133 

•134 

•135 

.136 

79-5 

.129 

.130 

.131 

•131 

.132 

•133 

•134 

•135 

.136 

•137 

80.0 

.130 

.131 

.132 

.133 

•134 

•135 

.136 

.136 

•137 

-.138 

80.5 

-O.I3I 

-0.132 

-0.133 

-0.134 

-0.135 

-0.136 

-0.137 

-0.138 

-0.139 

—0.140 

81.0 

.132 

•133 

•134 

.135 

.136 

•137 

.138 

•139 

.140 

.141 

81.5 

•134 

•135 

.136 

.137 

.138 

•139 

•139 

.140 

.141 

.142 

82.0 

•135 

.136 

•137 

.138 

•139 

.140 

.141 

.142 

•143 

.144 

82.5 

.136 

•137 

.138 

.139 

.140 

.141 

.142 

•143 

.144 

.145 

83.0 

-0.138 

-0.139 

-0.139 

—0.140 

—0.141 

—  o.  142 

-0.143 

-0.144 

-0.145 

—0.146 

83-5 

•139 

.I4O 

.141 

.142 

•143 

.144 

•145 

.146 

.147 

.148 

84.0 

.I4O 

.141 

.142 

.143 

.144 

.145 

.146 

.147 

.148 

.149 

84-5 

.141 

.142 

•143 

.144 

•145 

.146 

.147 

.148 

.149 

.150 

85.0 

•143 

.144 

•145 

.146 

.147 

.148 

.149 

.150 

.151 

.152 

85.5 

-0.144 

-0.145 

—  o.  146 

-0.147 

—0.148 

-0.149 

—0.150 

—O.I5I 

—0.152 

-0.153 

86.0 

-145 

.146 

.147 

.148 

.149 

.150 

.151 

.152 

•153 

•154 

86.5 

.146 

.147 

.148 

.149 

.151 

.152 

•153 

•154 

•155 

.156 

87.0 

.148 

.149 

.150 

.151 

.152 

.153 

•154 

•155 

.156 

•157 

87-5 

.149 

.150 

•151 

•  152 

•!53 

.154 

•155 

.156 

•157 

.158 

88.0 

—0.150 

—O.I5I 

—  o.  152 

-0.153 

-0.154 

-0.155 

-0.157 

—0.158 

-0.159 

—  o.  160 

88.5 

.151 

.152 

.154 

.155 

.156 

.157 

.158 

•159 

.160 

.161 

89.0 

•153 

•154 

.155 

.156 

•  157 

.158 

•159 

.160 

.161 

.162 

89-5 

•154 

•155 

.156 

.157 

.158 

•159 

.160 

.162 

•163 

.164 

90.0 

•155 

.156 

.157 

.158 

.160 

.161 

.162 

•163 

.164 

.165 

90.5 

-0.156 

-0.157 

—  o.  159 

—O.I  60 

—  0.161 

—  o.  162 

-o.  163 

—0.164 

-o.  165 

-0.166 

91.0 

.158 

.159 

.160 

.161 

.162 

.163 

.164 

.166 

.167 

.168 

91-5 

•159 

.160 

.161 

.162 

.163 

.165 

.166 

.!67 

.168 

.169 

92.0 

.160 

.161 

.162 

.164 

.165 

.166 

.167 

.168 

.169 

.170 

92-5 

.161 

.163 

.164 

.165 

.166 

.167 

.168 

.!69 

.171 

.172 

93.0 

-0.163 

—0.164 

—  o.  165 

-0.166 

—0.167 

-0.168 

—0.170 

—0.171 

—0.172 

-0.173 

93-5 

.164 

.165 

.166 

.I67 

.169 

.170 

.171 

.172 

.173 

.174 

94.0 

.165 

.166 

.168 

.I69 

.170 

.171 

.172 

.173 

•175 

.176 

94-5 

.166 

.168 

.169 

.170 

.171 

.172 

.174 

.175 

.176 

.177 

95-0 

.168 

.169 

.170 

.171 

.172 

.174 

.175 

.176 

.177 

.178 

95.5 

—0.169 

—0.170 

—0.171 

-0.173 

-0.174 

-0.175 

—0.176 

-0.177 

-0.179 

-0.180 

96.0 

.170 

.171 

.173 

.174 

•  175 

.176 

.177 

.179 

.180 

.181 

96.5 

.171 

•173 

.174 

•175 

.176 

.178 

.179 

.180 

.181 

.182 

97.0 

•173 

.174 

.175 

.176 

.178 

.179 

.180 

.181 

.183 

.184 

97-5 

.174 

•175 

.176 

.178 

.179 

.180 

.181 

.183 

.184 

.185 

98.0 

-0.175 

—0.176 

—0.178 

-0.179 

—0.180 

-0.181 

-0.183 

-0.184 

-0.185 

-0.186 

98.5 

.176 

.178 

.179 

.iSo 

.181 

.183 

.184 

.185 

.187 

.188 

99.0 

.178 

.179 

.180 

.182 

.183 

.184 

.185 

.187 

.188 

.189 

99-5 

.179 

.180 

.182 

.183 

.184 

.185 

.187 

.188 

.189 

.190 

100.  0 

.ISO 

.182 

.183 

.184 

.185 

.187 

.188 

.189 

.191 

.192 

SMITHSONIAN  TABLES. 


TABLE  10. 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
iiometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

29.8 

30.0 

30.2 

30.4 

30.6 

30.8 

31.0 

31.2 

31.4 

31.6 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

0?0 

fO.078 

+0.078 

+0.079 

+0.079 

+0.080 

+0.080 

+0.081 

+0.081 

+0.082 

+0.082 

0.5 

-1-0.076 

+0.077 

+0.077 

+0.078 

+0.078 

+0.079 

+0.079 

+0.080 

+0.080 

+0.081 

I.O 

•075 

.076 

.076 

.077 

.077 

.078 

.078 

.079 

.079 

.080 

i-5 

.074 

.074 

•075 

•075 

.076 

.076 

.077 

.077 

.078 

.078 

2.0 

.072 

•073 

•073 

.074 

.074 

•075 

•075 

.076 

.076 

.077 

2-5 

.071 

.071 

.072 

.072 

•073 

•073 

.074 

.074 

•075 

•075 

3.0 

(-0.070 

+0.070 

+0.070 

+0.071 

+0.071 

+0.072 

+0.072 

+0.073 

+0.073 

+0.074 

3-5 

.068 

.069 

.069 

.070 

.070 

.070 

.071 

.071 

.072 

.072 

4.0 

.067 

.067 

.068 

.068 

.069 

.069 

.070 

.070 

.070 

.071 

4-5 

.065 

.066 

.066 

.067 

.067 

.068 

.068 

.069 

.069 

5-0 

.064 

.065 

.065 

.065 

.066 

.066 

.067 

.067 

.068 

.068 

5.5 

-{-0.063 

+0.063 

+0.064 

+0.064 

+0.064 

+0.065 

+0.065 

+0.o66 

+0.066 

+0.067 

6.0 

.061 

.062 

.062 

•063 

.063 

.063 

.064 

.064 

.065 

.065 

6-5 

.060 

.060 

.061 

.061 

.062 

.062 

.062 

-063 

.063 

.064 

7.0 

•059 

•059 

•059 

.060 

.060 

.061 

.061 

.061 

.062 

.062 

7-5 

•057 

.058 

.058 

.058 

•059 

•059 

.060 

.060 

.060 

.061 

8.0 

Lo.o56 

+0.056 

+0.057 

+0.057 

+0.057 

+0.058 

+0.058 

+0.059 

+0.059 

+0.059 

8.5 

•055 

•055 

•055 

.056 

.056 

.056 

•057 

•057 

.058 

.058 

9.0 

•053 

•054 

•054 

•054 

•055 

•055 

•055 

.056 

.056 

.056 

9-5 

.052 

.052 

•053 

•053 

•053 

•054 

•054 

•054 

•055 

•055 

IO.O 

.05,1 

.051 

.051 

.052 

.052 

.052 

•053 

•053 

•053 

•054 

10.5 

-0.049 

+0.049 

+0.050 

+0.050 

+0.050 

+0.051 

+0.051 

+0.051 

+0.052 

+0.052 

II.  O 

.048 

.048 

.048 

.049 

.049 

.049 

.050 

.050 

.050 

-051 

n-5 

.046 

.047 

.047 

.047 

.048 

.048 

.048 

.049 

.049 

.049 

12.0 

•045 

•045 

.046 

.046 

.046 

.047 

.047 

.047 

.048 

.048 

12.5 

.044 

.044 

.044 

•045 

•045 

•045 

•045 

.046 

.046 

.046 

13.0 

-0.042 

+0.043 

+0.043 

+0.043 

+0.044 

+0.044 

+0.044 

+0.044 

+0.045 

+0.045 

13-5 

.041 

.041 

.042 

.042 

.042 

.042 

•043 

•043 

•043 

•043 

14.0 

.040 

.040 

.040 

.040 

.041 

.041 

.041 

.042 

.042 

.042 

14.5 

.038 

•039 

-039 

•039 

•039 

.040 

.040 

.040 

.040 

.041 

15.0 

•037 

•037 

•037 

.038 

.038 

.038 

.038 

•039 

•039 

•039 

15.5 

+0.036 

+0.036 

+0.036 

+0.036 

+0.037 

+0.037 

+0.037 

+0.037 

+0.037 

+0.038 

16.0 

•034 

•034 

•035 

•035 

•035 

•035 

.036 

.036 

.036 

.036 

16.5 

•033 

•033 

•033 

.034 

•034 

•034 

•034 

.034 

•035 

•035 

17.0 

.032 

.032 

.032 

.032 

.032 

•033 

•033 

•033 

•033 

•033 

17-5 

.030 

.030 

.031 

.031 

.031 

.031 

.031 

.032 

.032 

.032 

18.0 

+0.029 

+0.029 

+0.029 

+0.029 

+0.030 

+0.030 

+0.030 

+0.030 

+0.030 

+0.031 

18.5 

.027 

.028 

.028 

.028 

.028 

.028 

.029 

.029 

.029 

.029 

19.0 

.026 

.026 

.026 

.027 

.027 

.027 

.027 

.027 

.027 

.028 

19-5 

.025 

.025 

.025 

.025 

.025 

.026 

.O26 

.026 

.026 

.026 

20.0 

.023 

.024 

.024 

.024 

.024 

.024 

.024 

.024 

.025 

.025 

20.5 

+0.022 

+0.022 

+0.022 

+0.022 

+0.023 

+0.023 

+0.023 

+0.023 

+0.023 

+0.023 

21.0 

.021 

.021 

.021 

.O2I 

.O2I 

.O2I 

.022 

.022 

.022 

.022 

21.5 

.019 

.Oig 

.O2O 

.O2O 

.O2O 

.O2O 

.020 

.020 

.020 

.020 

22.0 

.018 

.018 

.018 

.018 

.018 

.019 

.019 

.019 

.019 

.019 

22.5 

.017 

.017 

.017 

.017 

.017 

.017 

.017 

.017 

.017 

.018 

23.0 

+0.015 

+0.015 

+0.015 

+0.016 

+0.016 

+0.016 

+0.01  6 

+0.01  6 

+0.01  6 

+0.016 

23.5 

.014 

.014 

.014 

.014 

.014 

.014 

.014 

.015 

.015 

.015 

24.0 

.013 

.013 

.013 

.013 

.013 

.013 

.013 

.013 

.013 

.013 

24.5 

.Oil 

.Oil 

.Oil 

.on 

.Oil 

.012 

.012 

.012 

.012 

.012 

25-0 

.OIO 

.010 

.OIO 

.OIO 

.OIO 

.OIO 

.OIO 

.OIO 

o.io 

.OIO 

SMITHSONIAN  TABLES. 


TABLE  10. 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahreri' 

heit. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

29.8 

30.0 

30.2 

30.4 

30.6 

30.8 

31.0 

31.2 

31.4 

31.6 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

25?5 

4-0.008 

+0.009 

+0.009 

+0.009 

+0.009 

+0.009 

+0.009 

+0.009 

+0.009 

+0.009 

26.0 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

.008 

.008 

26.5 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

27.0 

.004 

.004 

.004 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

27-5 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

28.0 

+•0.002 

4-O.OO2 

+0.002 

+0.002 

+O.OO2 

+0.002 

+0.002 

+0.002 

+O.OO2 

+0.002 

28.5 

O.OOO 

O.OOO 

0.000 

O.OOO 

O.OOO 

0.000 

0.000 

0.000 

O.OOO 

0.000 

29.0 

—  O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

29-5 

.002 

.002 

.OO2 

.002 

.002 

.OO2 

,OO2 

.OO2 

.002 

.002 

30.0 

.004 

.004 

.OO4 

.004 

.OO4 

.OO4 

.004 

.004 

.OO4 

.004 

30.5 

-0.005 

—0.005 

—0.005 

—0.005 

—0.005 

—0.005 

—0.005 

—0.005 

—0.005 

—0.005 

31.0 

.006 

.006 

.006 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

3i-5 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

32.0 

.009 

.009 

.009 

.009 

.009 

.009 

.009 

.010 

.OIO 

.010 

32.5 

.010 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.on 

.Oil 

.Oil 

33.0 

—0.012 

—  O.OI2 

—  O.OI2 

—0.012 

—  O.OI2 

—  O.OI2 

—0.012 

—0.012 

—  O.OI2 

-0.013 

33-5 

.013 

•013 

.013 

.013 

.OI4 

.014 

.014 

.014 

.OI4 

.014 

34-o 

.015 

.015 

.015 

.015 

.015 

.015 

.015 

.015 

.015 

.015 

34-5 

.016 

.016 

.016 

.Ol6 

.016 

.016 

.017 

.017 

.017 

.017 

35-0 

.017 

.017 

.017 

.018 

.018 

.018 

.018 

.018 

.018 

.018 

35.5 

—O.OI9 

—O.OI9 

—O.OI9 

—0.019 

—0.019 

—O.OI9 

—0.019 

—0.019 

—  O.O2O 

—0.020 

36.0 

.O2O 

.O2O 

.020 

.020 

.O2O 

.021 

.021 

.021 

.021 

.021 

36.5 

.021 

.021 

.022 

.022 

.022 

.022 

.022 

.022 

.022 

.023 

37-0 

.023 

.023 

.023 

.023 

.023 

.023 

.024 

.024 

.024 

.024 

37-5 

.024 

.024 

.024 

.024 

.025 

.025 

.025 

.025 

.025 

.025 

38.0 

—0.025 

—O.O26 

—0.026 

—0.026 

—O.O26 

—0.026 

—0.026 

—0.027 

—O.O27 

—  0.027 

33.5 

.027 

.027 

.027 

.027 

.027 

.028 

.028 

.028 

.028 

.028 

39-0 

.028 

.028 

.028 

.029 

.029 

.029 

.029 

.029 

.030 

.030 

39-5 

.029 

.030 

.030 

.030 

.030 

.030 

.031 

.031 

.031 

.031 

40.0 

.031 

.031 

.031 

.031 

.032 

.032 

.032 

.032 

.032 

•033 

40.5 

—0.032 

—0.032 

-0.033 

-0.033 

-0.033 

—0.033 

-0.033 

-0.034 

-0.034 

-0.034 

41.0 

•033 

•034 

•034 

•034 

•034 

•035 

•035 

•035 

•035 

•035 

41-5 

•035 

.035 

•035 

•035 

.036 

.036 

.036 

.036 

•037 

•037 

42.0 

.036 

.036 

•037 

•037 

•037 

•037 

.038 

.038 

.038 

.038 

42.5 

•037 

.038 

.038 

.038 

•038, 

•039 

•039 

•039 

.O4O 

.040 

43.0 

-0.039 

-0.039 

-0.039 

—O.O4O 

—0.040 

—0.040 

—O.O4O 

—O.O4I 

—0.041 

—0.041 

43-5 

.040 

.040 

.041 

.041 

.041 

.042 

.042 

.042 

.042 

•043 

44.0 

.042 

.042 

.042 

.042 

•043 

•043 

•043 

•043 

.044 

.044 

44-5 

•043 

•043 

•043 

.044 

.044 

.044 

•045 

•045 

•045 

•045 

45-0 

.044 

•045 

•045 

•045 

•045 

.046 

.046 

.046 

.047 

.047 

45.5 

—0.046 

—0.046 

—0.046 

-0.047 

-0.047 

-0.047 

-0.047 

—0.048 

—0.048 

—0.048 

46.0 

.047 

.047 

.048 

.048 

.048 

.049 

.049 

.049 

.049 

.050 

46.5 

.048 

.049 

.049 

.049 

.050 

.050 

.050 

.051 

.051 

.051 

47.0 

.050 

.050 

.050 

.051 

.051 

.051 

.052 

.052 

.052 

•053 

47-5 

.051 

.051 

.052 

.052 

.052 

•053 

•053 

•053 

•054 

.054 

48.0 

-0.052 

-0.053 

-0.053 

-0.053 

-0.054 

-0.054 

-0.054 

-0.055 

-0.055 

-0.055 

48.5 

•054 

•054 

.054 

•055 

•055 

•055 

.056 

.056 

•057 

•057 

49.0 

•055 

•055 

.056 

.056 

•057 

.057 

•057 

.058 

.058 

.058 

49-5 

.056 

•057 

•057 

.058 

.058 

.058 

•059 

•059 

•059 

.060 

50.0 

.058 

.058 

.058 

•059 

•059 

.060 

.060 

.060 

.061 

.061 

SMITHSONIAN  TABLE*. 


TABLE  10. 

REDUCTION    OF  THE    BAROMETER  TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

29.8 

30.0 

30.2 

30.4 

30.6 

30.8 

31.0 

31.2 

31.4 

31.6 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

50?5 

-0.059 

—0.059 

—0.060 

—O.o6o 

—O.o6  1 

—O.o6  1 

—0.06  1 

—0.062 

—0.062 

—0.063 

51.0 

.060 

.061 

.061 

.062 

.062 

.062 

.063 

.063 

.064 

.064 

5i-5 

.062 

.062 

•063 

.063 

•063 

.064 

.064 

.065 

.065 

>o65 

52.0 

.063 

.064 

.064 

.064 

.065 

.065 

.066 

.066 

.066 

.067 

52.5 

.064 

.065 

.065 

.066 

.066 

.067 

.067 

.067 

.068 

.068 

53.0 

-0.066 

—0.066 

—0.067 

—0.067 

-0.068 

—0.068 

—O.o68 

—0.069 

—0.069 

—0.070 

535 

.067 

.068 

.068 

.069 

.069 

.069 

.070 

.070 

.071 

.071 

54-o 

.068 

.069 

.069 

.070 

.070 

.071 

.071 

.072 

.072 

•073- 

i    54-5 

.070 

.070 

.071 

.071 

.072 

.072 

•073 

•073 

.074 

.074 

55-0 

.071 

.072 

.072 

•073 

•073 

.074 

.074 

.075 

•075 

.075 

55.5 

-0.073 

-0.073 

—0.074 

-0.074 

—0.074 

-0.075 

-0.075 

—0.076 

—0.076 

-0.077 

56.0 

.074 

.074 

•075 

•075 

.076 

.076 

.077 

.077 

.078 

.078 

56.5 

•075 

.076 

.076 

.077 

.077 

.078 

.078 

.079 

.079 

.080 

57-o 

.077 

.077 

.078 

.078 

.079 

.079 

.080 

.080 

.O8l 

.081 

57-5 

.078 

.078 

.079 

.079 

.080 

.081 

.081 

.082 

.082 

.083 

58.0 

—0.079 

—0.080 

—0.080 

—O.oSl 

—O.oSl 

—0.082 

—0.082 

—0.083 

—0.084 

—0.084 

58.5 

.081 

.081 

.082 

.082 

.083 

.083 

.084 

.084 

•  085 

.085 

59-° 

.082 

.083 

.083 

.084 

.084 

.085 

.085 

.086 

.086 

.087 

59-5 

.083 

.084 

.084 

.085 

.086 

.086 

.087 

.087 

.088 

.088 

60.0 

.085 

.085 

.086 

.086 

.087 

.087 

.088 

.089 

.089 

.090 

60.5 

—O.o86 

—0.087 

—0.087 

-0.088 

—0.088 

—0.089 

—0.089 

—0.090 

—0.091 

—0.091 

61.0 

.087 

.088 

.089 

.089 

.090 

.090 

.091 

.091 

.092 

•093 

61.5 

.089 

.089 

.090 

.090 

.091 

.092 

.092 

•093 

•093 

.094 

62.0 

.090 

.091 

.091 

.092 

.092 

•093 

.094 

.094 

•095 

.095 

62.5 

.091 

.092 

.093 

•093 

.094 

.094 

•095 

.096 

.096 

.097 

63.0 

-0.093 

-0.093 

-0.094 

-0.095 

-0.095 

—0.096 

—0.096 

-0.097 

-0.098 

-0.098 

63-5 

.094 

•095 

•095 

.096 

.097 

.097 

.098 

.098 

.099 

.100 

64.0 

•095 

.096 

.097 

.097 

.098 

.099 

.099 

.100 

.IOI 

.101 

64-5 

.097 

.097 

.098 

.099 

.099 

.100 

.101 

.101 

.IO2 

.103 

65.0 

.098 

.099 

.099 

.100 

.101 

.101 

.102 

.103 

.103 

.104 

65.5 

-0.099 

—  0.100 

—  0.  101 

—  O.IOI 

—  0.  102 

—  o.  103 

—0.103 

—  o.  104 

—  o.  105 

—  o.  105 

66.0 

.101 

.101 

.102 

.103 

.103 

.104 

.105 

.106 

.106 

.107 

66.5 

.102 

.103 

.103 

.104 

.105 

.106 

.106 

.107 

.108 

.108 

67.0 

.103 

.104 

.105 

.106 

.106 

.107 

.108 

.108 

.109 

.no 

67-5 

.105 

.106 

.106 

.107 

.108 

.108 

.109 

.110 

.110 

.III 

68.0 

—  o.  106 

—  o.  107 

—  o.  108 

—0.108 

—  o.  109 

—O.I  10 

—O.I  10 

—  O.III 

—  O.II2 

-0.113 

68.5 

.107 

.108 

.109 

.110 

.110 

.III 

.112 

.113 

•113 

.114 

69.0 

.109 

.110 

.110 

.III 

.112 

.112 

•113 

.114 

•US 

.115 

69-5 

.110 

.III 

.112 

.112 

•113 

.114 

•US 

.115 

.116 

.117 

70.0 

.112 

.112 

•113 

.114 

•115 

•US 

.116 

.117 

.117 

.118 

70.5 

-O.II3 

—O.II4 

—O.II4 

—O.II5 

—  0.116 

—O.II7 

—O.II7 

—0.118 

—O.II9 

—  O.  I2O 

71.0 

.114 

•US 

.116 

.116 

.117 

.118 

.119 

.120 

.120 

.121 

71.5 

.116 

.116 

.117 

.118 

.119 

.119 

.120 

.121 

.122 

.123 

72.0 

.117 

.118 

.118 

.119 

.120 

.121 

.122 

.122 

.123 

.124 

72.5 

.118 

.119 

.120 

.121 

.121 

.122 

.123 

.124 

•125 

•125 

73.0 

—0.120 

—0.120 

—  O.I2I 

—0.122 

—0.123 

—0.124 

—0.124 

—0.125 

—O.I26 

—0.127 

73-5 

.121 

.122 

.123 

.123 

.124 

•125 

.126 

.127 

.127 

.128 

74.0 

.122 

.123 

.124 

.125 

.126 

.126 

.127 

.128 

.129 

.130 

74-5 

.124 

.124 

.125 

.126 

.127 

.128 

.129 

.129 

.130 

.131 

75-0 

.125 

.126 

.127 

.127 

.128 

.129 

.130 

.131 

.132 

.132 

SMITHSONIAN  TABLES. 


TABLE  10, 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

29.8 

30.0 

30.2 

30.4 

30.6 

30.8 

31.0 

31.2 

31.4 

31.6 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

75?5 

—0.126 

—0.127 

—0.128 

—0.129 

—0.130 

-0.131 

—0.131 

—0.132 

-0.133 

-0.134 

76.0 

.128 

.128 

.129 

.130 

.131 

.132 

•133 

•134 

.134 

.135 

76.5 

.129 

.130 

•131 

.132 

.132 

•133 

.134 

•135 

.136 

•137 

77.0 

.130 

.131 

.132 

•133 

•134 

.135 

.136 

.136 

•137 

.138 

77-5 

.132 

.133 

•133 

.134 

•!35 

.136 

.137 

.138 

•139 

.140 

78.0 

-0.133 

-0.134 

-0.135 

—0.136 

-0.137 

-0.137 

-0.138 

-0.139 

—  o.  140 

—0.141 

78.5 

.134 

.135 

.136 

•137 

.138 

•139 

.140 

.141 

.142 

.142 

•79-0 

.136 

.137 

•137 

.138 

•139 

.140 

.141 

.142 

•143 

.144 

79-5 

.137 

.138 

•J39 

.140 

.141 

.142 

.143 

•143 

.144 

•MS 

80.0 

.138 

.139 

.140 

.141 

.142 

•143 

.144 

•145 

.146 

:i47 

80.5 

—  o.  140 

—0.141 

—  o.  142 

—  o.  142 

-0.143 

-0.144 

-0.145 

—0.146 

-0.147 

—0.148 

81.0 

.141 

.142 

•  143 

.144 

.145 

.146 

.147 

.148 

.149 

.150 

81.5 

.142 

•143 

.144 

.145 

.146 

.147 

.148 

.149 

.150 

•  151 

82.0 

.144 

•145 

.146 

.147 

.148 

.149 

.149 

.150. 

.151 

.152 

82.5 

•145 

.146 

.147 

.148 

.149 

.150 

.151 

.152 

•153 

•  154 

83.0 

-o.  146 

-0.147 

-0.148 

-0.149 

—  o.  150 

-0.151 

-0.152 

-0.153 

-0.154 

-0.155 

83-5 

.148 

.149 

.150 

.151 

.152 

.153 

•154 

•155 

.156 

.157 

84.0 

.149 

.150 

•  151 

.152 

•153 

•154 

.155 

.156 

•157 

.158 

84-5 

.150 

.151 

.152 

.153 

.154 

•155 

.156 

•157 

.158 

.159 

85.0 

.152 

•153 

.154 

.155 

.156 

•157 

.158 

•159 

.160 

.161 

85.5 

-0.153 

-0.154 

-0.155 

—0.156 

-0.157 

-0.158 

-0.159 

—o.i  60 

—  0.161 

—  o.  162 

86.0 

.154 

.155 

.156 

.158 

•159 

.160 

.161 

.162 

.163 

.164 

86.5 

.156 

.157 

.158 

.159 

.160 

.161 

.162 

.163 

.164 

.165 

87.0 

.157 

.158 

•!59 

.160 

.161 

.162 

•163 

.164 

.166 

.167 

87.5 

.158 

.159 

.161 

.162 

.163 

.164 

.165 

.166 

.167 

.168 

88.0 

-0.160 

—  0.161 

—  o.  162 

-0.163 

—0.164 

—  o.  165 

-0.166 

—  o.  167 

-0.168 

—  o.  169 

88.5 

.161 

.162 

.163 

.164 

.165 

.166 

.168 

.169 

.170 

.171 

89.0 

.162 

.164 

.165 

.166 

.167 

.168 

.I69 

.170 

.171 

.172 

89.5 

.164 

.165 

.166 

.!67 

.168 

.169 

.170 

.171 

•173 

.174 

90.0 

.165 

.166 

.167 

.168 

.170 

.171 

.172 

.173 

.174 

.175 

90.5 

-0.166 

-0.168 

—  o.  169 

—0.170 

—0.171 

—0.172 

-0.173 

-0.174 

-0.175 

—0.176 

91.0 

.168 

.169 

.170 

.171 

.172 

.173 

.175 

.176 

.177 

.178 

9I-5 

.169 

.170 

.171 

.173 

.174 

.175 

.176 

.177 

.178 

.179 

92.0 

.170 

.172 

.173 

.174 

.175 

.176 

.177 

.178 

.180 

.181 

92.5 

.172 

•  173 

.174 

.175 

.176 

.178 

.179 

.180 

.181 

.182 

93.0 

-0.173 

-0.174 

-0.175 

-0.177 

—0.178 

-0.179 

—O.lSo 

—0.181 

—0.182 

—0.184 

93-5 

.174 

.176 

.177 

.178 

.179 

.180 

.l8l 

.183 

.184 

.185 

94.0 

.176 

.177 

.178 

.179 

.180 

.182 

.183 

.184 

.185 

.186 

94-5 

.177 

.178 

.179 

.181 

.182 

.183 

.184 

.185 

.!87 

.188 

95-0 

.178 

.180 

.181 

.182 

.183 

.184 

.186 

.187 

.188 

.189 

95.5 

-0.180 

—0.181 

—0.182 

-0.183 

-0.185 

-0.186 

—0.187 

-0.188- 

—  o.  189 

—0.191 

96.0 

.181 

.182 

.184 

.185 

.186 

.187 

.188 

.190 

.191 

.192 

96.5 

.182 

.184 

.185 

.186 

.187 

.189 

.190 

.191 

.192 

.193 

97.0 

.184 

.185 

.186 

.187 

.189 

.190 

.191 

.192 

.194 

.195 

97-5 

.185 

.186 

.188 

.189 

.190 

.191 

•193 

.194 

.195 

.196 

98.0 

-o.i  86 

-0.188 

—0.189 

—0.190 

—0.191 

-0.193 

-0.194 

-0.195 

—  o.  196 

—0.198 

98.5 

.188 

.189 

.190 

.192 

.193 

.194 

•195 

.197 

.198 

.199 

99.0 

.189 

.190 

.192 

.193 

.194 

.195 

.197 

.198 

.199 

.201 

99-5 

.190 

.192 

.193 

.194 

.196 

.197 

.198 

.199 

.201 

.202 

IOO.O 

.192 

•193 

.194 

.196 

.197 

.198 

.200 

.201 

.202 

.203 

SMITHSONIAN  TABLES. 


33 


TABLE  11. 
REDUCTION    OF  THE    BAROMETER  TO  STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  TO  BE  SUBTRACTED. 


Attache 
Ther- 
momete 
Centi- 
grade. 

HEIGHT  OP  THE  BAROMETER  IN  MILLIMETRES. 

440 

450 

460 

470 

480 

490 

500 

510 

520 

53O 

540 

550 

560 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

oro 

O.OO 

0.00 

0.00 

0.00 

0.00 

0.00 

0.00 

O.OO 

O.OO 

O.OO 

0.00 

0.00 

O.OO 

0.5 

.04 

.04 

.04 

.04 

.04 

.04 

.04 

.04 

.04 

.04 

.04 

.04 

•05 

I.O 

.07 

.07 

.08 

.08 

.08 

.08 

.08 

.08 

.08 

.09 

.09 

.09 

.09 

!-5 

.11 

.11 

.11 

.12 

.12 

.12 

.12 

.12 

•13 

.13 

•13 

.14 

2.0 

.14 

•15 

.15 

•15 

.16 

.16 

.16 

•17 

.17 

•17 

.18 

.18 

.18 

2.5 

0.18 

0.18 

0.19 

0.19 

O.2O 

O.2O 

O.2O 

O.2I 

0.21 

0.22 

0.22 

0.22 

0.23 

3-0 

.22 

.22 

.23 

•23 

.24 

.24 

.24 

.25 

•25 

.26 

.26 

•27 

•27 

3-5 

•25 

.26 

.26 

.27 

.27 

.28 

.29 

•29 

•3° 

•30 

•31 

•31 

•32 

4.0 

.29 

.29 

.30 

•31 

•31 

•32 

•33 

•33 

•34 

•35 

•35 

•36 

•37 

4-5 

•32 

•33 

•34 

•35 

•35 

.36 

•37 

•37 

•38 

•39 

.40 

.40 

.41 

5.0 

0.36 

0.37 

0.38 

0.38 

0-39 

0.40 

0.41 

0.42 

0.42 

0-43 

0.44 

0-45 

0.46 

5-5 

.40 

.40 

.41 

.42 

•43 

•44 

•45 

.46 

•47 

.48 

.48 

•49 

•50 

6.0 

•43 

.44 

•45 

.46 

•47 

•48 

•49 

•50 

•52 

•53 

•54 

•55 

6.5 

•47 

.48 

•49 

•50 

.51 

•52 

•53 

•54 

•55 

•56 

•57 

•58 

•59 

7.0 

•50 

•51 

•53 

•54 

•55 

.56 

•57 

.58 

•59 

.61 

.62 

•63 

.64 

7.5 

0-54 

0.55 

0.56 

0.58 

0-59 

0.60 

0.61 

0.62 

0.64 

0.65 

0.66 

0.67 

0.69 

80 

•57 

.59 

.60 

.61 

.63 

•  64 

.65 

•67 

.68 

.69 

.70 

.72 

•73 

8-5 

.61 

.62 

.64 

•65 

.67 

.68 

.69 

•7i 

.72 

•73 

•75 

•  76 

•78 

9.0 

.65 

.66 

.68 

.69 

.70 

•72 

•  73 

•75 

•76 

•78 

•79 

.81 

.82 

9-5 

.68 

.70 

•7i 

•73 

•  74 

.76 

.77 

•79 

.81 

.82 

.84 

•85 

.87 

10.0 

0.72 

0.73 

o.75 

0.77 

0.78 

0.80 

0.82 

0.83 

0.85 

0.86 

0.88 

0.90 

0.91 

10.5 

•75 

•  77 

•79 

.80 

.82 

•84 

.86 

.87 

•89 

.91 

.92 

•94 

.96 

II.O 

•79 

.81 

•83 

.84 

.86 

.88 

.90 

.91 

•93 

•95 

•97 

.99 

I.OO 

11.5 

•83 

.84 

.86 

.88 

.90 

•92 

•94 

.96 

•98 

•99 

1.  01 

1.03 

1.05 

12.0 

.86 

.88 

.90 

.92 

•94 

.96 

.98 

I.OO 

1.02 

1.04 

i.  06 

i.  08 

I.IO 

13.0 

o.93 

0-95 

o-97 

.00 

1.02 

1.04 

i.  06 

.08 

I.IO 

1.  12 

1.14 

1.17 

1.19 

14.0 

I.OO 

1.03 

1.05 

.07 

I.IO 

1.  12 

1.14 

.16 

I.I9 

1.  21 

1.23 

1.25 

1.28 

15.0 

1.08 

I.IO 

1.  12 

•15 

I.I7 

1.20 

.22 

•25 

1.27 

1.30 

1.32 

1-34 

i-37 

16.0 

1.15 

1.17 

1.20 

.23 

1.25 

1.28 

•30 

•33 

1.36 

1.38 

1.41 

i-43 

1.46 

17.0 

1.22 

1.25 

1.27 

•30 

1-33 

1.36 

.38 

.41 

1.44 

1-47 

1.50 

1.52 

i.55 

18.0 

.29 

1.32 

1-35 

•38 

I.4I 

1.44 

•47 

•50 

•52 

1-55 

1.58 

1.61 

1.64 

19.0 

•36 

1-39 

1.42 

•45 

1.49 

1.52 

•  55 

-58 

.61 

1.64 

1.67 

1.70 

1-73 

20.0 

•43 

1.47 

1-50 

•53 

1.56 

1.60 

•63 

.66 

.69 

i-73 

1.76 

i-79 

1.82 

21.0 

.50 

1-54 

1.57 

.61 

1.64 

1.67 

•74 

.78 

1.81 

1-85 

1.88 

1.91 

22.0 

•58 

1.61 

1.65 

.68 

1.72 

1-75 

•79 

•83 

.86 

1.90 

i-93 

i-97 

2.01 

23.0 

•65 

1.68 

1.72 

•76 

1.80 

1.83 

1.87 

1.91 

i-95 

1.98 

2.02 

2.06 

2.IO 

24.0 

.72 

1.76 

1.80 

.84 

1.87 

1.91 

J-95 

1.99 

2.03 

2.07 

2.  II 

2.15 

2.19 

25-0 

•79 

1-83 

1.87 

•91 

1.99 

2.03 

2.07 

2.  II 

2.16 

2.20 

2.24 

2.28 

26.0 

.86 

1.90 

i-95 

•99 

2.03 

2.07 

2.II 

2.16 

2.20 

2.24 

2.28 

2-33 

2-37 

27.0 

i-93 

1.98 

2.02 

2.06 

2.II 

2.15 

2.20 

2.24 

2.28 

2-33 

2.37 

2.41 

2.46 

28.0 

2.00 

2.05 

2.09 

2.14 

2.18 

2.23 

2.28 

2.32 

2.37 

2.41 

2.46 

2.50 

2-55 

29.0 

2.07 

2.12 

2.17 

2.22 

2.26 

2.31 

2.36 

2.40 

2-45 

2.50 

2.55 

2.59 

2.64 

30.0 

2.15 

2.19 

2.24 

2.29 

2.34 

2-39 

2.44 

2.49 

2.54 

2.58 

2.63 

2.68 

2-73 

31-0 

2.22 

2.27 

2.32 

2-37 

2.42 

2.47 

2.52 

2.57 

2.62 

2.67 

2.72 

2.77 

2.82 

32.0 

2.29 

2-34 

2-39 

2.44 

2.50 

2-55 

2.60 

2.65 

2.70 

2.76 

2.81 

2.86 

2.9I 

33.0 

2.36 

2.41 

2.47 

2.52 

2.57 

2.63 

2.68 

2.73 

2.79 

2.84 

2.89 

2.95 

3.00 

34-0 

2-43 

2.48 

2-54 

2.60 

2.65 

2.71 

2.76 

2.82 

2.87 

2-93 

2.98 

3.04 

3.09 

35-0 

2.50 

2.55 

2.61 

2.67 

2.73 

2.78 

2.84 

2.90 

2.96 

3.01 

3.07 

3-13 

3.18 

SMITHSONIAN  TABLES 


TABLE  11. 

I  TJN I VERSITY 
REDUCTION    OF  THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

METRIC    MEASURES. 
FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OP  THE   BAROMETER 

560  mm. 

HEIGHT  OF  THE  BAROMETER 

570  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

o.oo 

O.O2 

0.04 

0.05 

0.07 

0.00 

0.02 

0.04 

0.06 

0.07 

i 

.09 

.11 

•13 

•15 

.16 

.09 

.11 

•13 

•15 

•17 

2 

.18 

.20 

.22 

.24 

.26 

.19 

.20 

.22 

.24 

.26 

3 

.27 

.29 

•31 

•33 

•35 

.28 

•30 

•32 

•34 

•35 

4 

•37 

.38 

.40 

.42 

•44 

•37 

•39 

.41 

•43 

•45 

5 

0.46 

0.48 

0.49 

0.51 

0-53 

0.47 

0.48 

0.50 

0.52 

0.54 

6 

•55 

•57 

•58 

.60 

.62 

.56 

•58 

.60 

.61 

•^3 

7 

.64 

.66 

.68 

.69 

•7i 

•65 

.67 

.69 

•71 

•73 

8 

•73 

•75 

•  77 

•79 

.80 

•74 

.76 

•78 

.80 

.82 

9 

.82 

.84 

.86 

.88 

.90 

•84 

.86 

.87 

.89 

•9i 

10 

0.91 

o-93 

0-95 

0.97 

0.99 

o-93 

o-95 

0.97 

0.99 

1.  00 

ii 

.00 

i.  02 

1.04 

1.06 

i.  08 

i.  02 

1.04 

1.06 

1.08 

1.  10 

12 

.10 

i.  ii 

1-13 

1.15 

1.17 

1.  12 

I.I3 

1.15 

1.17 

1.19 

13 

•19 

1.20 

1.22 

1.24 

1.26 

1.  21 

1.23 

1.25 

1.26 

1.28 

14 

.28 

1.30 

1*3* 

!-33 

!.35 

I.30 

1.32 

1.36 

J-37 

15 

•37 

T-39 

1.41 

1.42 

1.44 

I>39 

1.41 

1-43 

1-45 

1.47 

16 

.46 

1.48 

1.50 

I-5I 

i-53 

1.49 

1.50 

1.52 

1-54 

1.56 

17 

•55 

1.57 

1-59 

1.61 

1.62 

1-58 

1.60 

1.62 

1.63 

1.65 

18 

•64 

1.66 

1.68 

1.70 

1.71 

1.67 

1.69 

1.71 

1-73 

1-75 

19 

•73 

i-75 

1.77 

1-79 

1.81 

1.76 

1.78 

1.80 

1.82 

1.84 

20 

.82 

1.84 

1.86 

1.88 

1.90 

1.86 

1.87 

1.89 

1.91 

1.93 

21 

.91 

i-93 

i-95 

1.97 

1.99 

1.95 

1.97 

1.99 

2.00 

2.  02 

22 

2.OI 

2.  02 

2.04 

2.06 

2.08 

2.04 

2.06 

2.08 

2.10 

2.  II 

23 

2.IO 

2.  II 

2.13 

2.15 

2.17 

2.13 

2-15 

2.17 

2.19 

2.21 

24 

2.19 

2.20 

2.22 

2.24 

2.26 

2.23 

2.24 

2.26 

2.28 

2.30 

25 

2.28 

2.30 

2.3I 

2-33 

2-35 

2.32 

2-34 

2.35 

2-37 

2-39 

26 

2-37 

2-39 

2.40 

2.42 

2-44 

2.41 

2-43 

2-45 

247 

2.48 

27 

2.46 

2.48 

2-49 

2.51 

2-53 

2.50 

2.52 

2.54 

2.56 

2.58 

28 

2-55 

2.57 

2.59 

2.60 

2.62 

2-59 

2.61 

2.63 

2.65 

2.67 

29 

2.64 

2.66 

2.68 

2.69 

2.71 

2.69 

2.71 

2.72 

2.74 

2.76 

30 

2-73 

2-75 

2.77 

2.78 

2.80 

2.78 

2.80 

2.82 

2.83 

2.85 

31 

2.82 

2.84 

2.86 

2.87 

2.89 

2.87 

2.89 

2.91 

2-93 

2.94 

32 

2.91 

2-93 

2.95 

2.97 

2.98 

2.96 

2.98 

3.00 

3.02 

3.04 

33 

3.00 

3.02 

3-04 

3.06 

3-07 

3-o6 

3.07 

3-09 

3-13 

34 

3-09 

3-n 

3-13 

3-15 

3-i6 

3-15 

3.17 

3-18 

3-20 

3-22 

35 

3-18 

3.20 

3-22 

3-24 

3-25 

3-24 

3.26 

3.28 

3.29 

3.31 

SMITHSONIAN  TABLES. 


35 


TABLE  11. 
REDUCTION    OF  THE    BAROMETER  TO    STANDARD  TEMPERATURES 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF  THE   BAROMETER 

580  mm. 

HEIGHT  OF  THE  BAROMETER 

590  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

O.OO 

O.O2 

0.04 

O.o6 

O.o8 

O.OO 

O.O2 

0.04 

O.o6 

O.o8 

i 

.09 

.11 

•13 

•15 

•17 

.10 

.12 

.13 

•15 

•17 

2 

•!9 

.21 

•23 

•25 

.27 

.19 

.21 

•23 

•25 

•27 

3 

.28 

•30 

•32 

•34 

.36 

.29 

•31 

•33 

•35 

•37 

4 

.38 

.40 

.42 

•44 

•45 

•39 

.40 

.42 

.44 

.46 

5 

0.47 

0.49 

0.51 

0-53 

0-55 

0.48 

0.50 

0.52 

o.54 

0.56 

6 

•57 

•59 

.61 

.62 

.64 

•58 

.60 

.62 

.64 

•65 

7 

.66 

.68 

.70 

.72 

•74 

•67 

.69 

•  7i 

•73 

•75 

8 

.76 

•78 

•79 

.81 

•83 

•  77 

•79 

.81 

•83 

•85 

9 

.85 

•87 

•89 

.91 

•93 

•87 

.89 

.90 

•92 

•94 

10 

o.95 

0.96 

0.98 

.00 

1.02 

0.96 

0.98 

1.  00 

i.  02 

1.04 

ii 

.04 

i.  06 

.08 

.10 

1.  12 

1.06 

1.08 

1.  10 

1.  12 

1.14 

12 

•13 

•15 

•  17 

•19 

1.  21 

1-15 

1.17 

1.19 

1.  21 

1.23 

13 

•23 

•25 

.27 

.29 

I.30 

1.25 

1.27 

1.29 

I-3I 

1-33 

14 

•32 

•34 

.36 

.38 

1.40 

1-35 

i-37 

1.38 

1.40 

1.42 

15 

.42 

•44 

.46 

1.47 

1.49 

1.44 

1.46 

1.48 

1.50 

1.52 

16 

•51 

•53 

•55 

i-57 

i-59 

1-54 

1.56 

1.58 

1.  60 

1.61 

17 

.61 

.62 

.64 

1.66 

1.68 

1.63 

1.65 

1.67 

1.69 

1.71 

18 

.70 

•72 

1.74 

1.76 

1.78 

1-73 

1-75 

1.77 

1.79 

1.81 

19 

•79 

.81 

1.83 

1.85 

1.87 

1-83 

1.84 

1.86 

1.88 

1.90 

20 

1.89 

1.91 

i-93 

1-95 

1.96 

1.92 

1.94 

1.96 

1.98 

2.OO 

21 

1.98 

2.OO 

2.  02 

2.04 

2.06 

2.  02 

2.04 

2.06 

2.07 

2.O9 

22 

2.08 

2.10 

2.II 

2.13 

2.15 

2.II 

2.13 

2.15 

2.17 

2.19 

23 

2.17 

2.19 

2.21 

2.23 

2.25 

2.21 

2.23 

2.25 

2.27 

2.28 

24 

2.26 

2.28 

2.30 

2.32 

2-34 

2.30 

2.32 

2.34 

2.36 

2.38 

25 

2.36 

2.38 

2.4O 

2.41 

2-43 

2.4O 

2.42 

2-44 

2.46 

2.48 

26 

2-45 

2-47 

2.49 

2.51 

2-53 

2.49 

2.51 

2-53 

2.55 

2-57 

27 

2-55 

2-57 

2.58 

2.60 

2.62 

2-59 

2.61 

2.63 

2.65 

2.67 

28 

2.64 

2.66 

2.68 

2.70 

2.72 

2.69 

2.70 

2.72 

2.74 

2.76 

29 

2.73 

2-75 

2.77 

2-79 

2.81 

2.78 

2.80 

2.82 

2.84 

2.86 

30 

2.83 

2.85 

2.87 

2.88 

2.90 

2.88 

2.90 

2.91 

2-93 

2.95 

3i 

2.92 

2.94 

2.96 

2.98 

3.00 

2-97 

2.99 

3.01 

3-03 

3-05 

32 

3-02 

3-03 

3-05 

3-07 

3-09 

3-07 

3-09 

3-H 

3-12 

3-14 

33 

3-H 

3-13 

3-15 

3-i6 

3-i8 

3-i6 

3-i8 

3.20 

3.22 

3.24 

34 

3-20 

3-22 

3-24 

3-26 

3.28 

3-26 

3-28 

3-30 

3.3i 

3-33 

35 

3-30 

3-31 

3-33 

3-35 

3-37 

3-35 

3-37 

3-39 

3-41 

343 

SMITHSONIAN  TABLES. 


TABLE  11 
REDUCTION   OF  THE   BAROMETER    TO   STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT  OP  THE  BAEOMETER 

600  mm. 

HEIGHT  OF  THE   BAROMETER 

605  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

o.oo 

0.02 

0.04 

0.06 

0.08 

0.00 

0.02 

0.04 

O.o6 

0.08 

i 

.10 

.12 

.14 

.16 

.18 

.10 

.12 

.14 

.16 

.18 

2 

.20 

.22 

.24 

•25 

.27 

.20 

.22 

•24 

.26 

.28 

3 

.29 

•31 

•33 

•35 

•37 

•30 

•32 

•34 

•36 

•38 

4 

•39 

.41 

-43 

•45 

.47 

.40 

.41 

•43 

•  45 

•47 

5 

0.49 

0.51 

0-53 

0-55 

0-57 

0.49 

0.51 

o.53 

0-55 

0-57 

6 

•59 

.61 

•63 

•65 

•67 

•59 

.61 

.63 

•65 

•67 

7 

.69 

.70 

.72 

•  74 

•76 

.69 

•71 

•73 

•75 

•77 

8 

.78 

.80 

.82 

.84 

.86 

•79 

.81 

•83 

•85 

•  87 

9 

.88 

.90 

.92 

•94 

.96 

.89 

•91 

•93 

•95 

•97 

10 

0.98 

.OO 

1.02 

.04 

1.06 

0.99 

1.  01 

1.03 

•05 

1.07 

ii 

1.08 

.10 

.12 

•13 

i-i5 

1.09 

I.IO 

1.  12 

.14 

1.16 

12 

•17 

•19 

.21 

•23 

1-25 

1.18 

1.20 

1.22 

.24 

1.26 

13 

.27 

.29 

•31 

•33 

i-35 

1.28 

1-30 

1.32 

•34 

1.36 

*4 

•37 

•39 

.41 

•43 

1-45 

1.38 

1.40 

1.42 

•44 

1.46 

15 
16 

•47 
.56 

•49 

•58 

$ 

£ 

1-54 
1.64 

1.48 
1.58 

1.50 
1.  60 

1.52 
1.62 

•54 
.64 

1.56 
1.66 

i? 

.66 

.68 

.70 

1.72 

1.74 

1.68 

1.70 

I.7I 

•73 

i-75 

18 

.76 

•  78 

.80 

1.82 

1.84 

1.77 

1.79 

1.81 

•83 

1.85 

19 

1.86 

.88 

1.90 

1.91 

i-93 

1.87 

1.89 

1.91 

i-93 

i-95 

20 

1-95 

1.97 

1.99 

2.01 

2.03 

1.97 

1.99 

2.01 

2.03 

2.05 

21 

2.05 

2.07 

2.09 

2.II 

2.13 

2.07 

2.09 

2.  II 

2.13 

2-15 

22 

2-15 

2.17 

2.19 

2.21 

2.23 

2.17 

2.19 

2.21 

2.23 

2.24 

23 

2.25 

2.26 

2.28 

2^0 

2.32 

2.26 

2.28 

2.30 

2.32 

2-34 

24 

2-34 

2.36 

2.38 

2.40 

2.42 

2.36 

2.38 

2.40 

2.42 

2.44 

25 

2.44 

2.46 

2.48 

2.50 

2.52 

2.46 

2.48 

2.50 

2.52 

2-54 

26 

2-54 

2.56 

2.58 

2.6O 

2.61 

2.56 

2.58 

2.60 

2.62 

2.64 

27 

2.63 

2.65 

2.67 

2.69 

2.71 

2.66 

2.68 

2.7O 

2.71 

2-73 

28 

2-73 

2-75 

2.77 

2.79 

2.81 

2-75 

2-77 

2.79 

2.81 

2.83 

29 

2.83 

2.85 

2.87 

2.89 

2.91 

2.85 

2.87 

2.89 

2.91 

2-93 

30 

2-93 

2.94 

2.96 

2.98 

3.00 

2-95 

2.97 

2.99 

3.01 

3-03 

31 

3.02 

3-°4 

3-06 

3.08 

3.10 

3-05 

3-07 

3-09 

3-ii 

3-13 

32 

3.12 

3-14. 

3-16 

3-i8 

3.20 

3-15 

3.16 

3-i8 

3.20 

3.22 

33 

3-22 

3-24 

3-25 

3-27 

3.29 

3-24 

3-26 

3.28 

3-30 

3-32 

34 

3-3i 

3-33 

3-35 

3-37 

3-39 

3-34 

3-36 

3.38 

3-40 

3-42 

35 

3-41 

3-43 

3-45 

3-47 

3-49 

3-44 

346 

348 

3-50 

3-52 

SMITHSONIAN  TABLES. 


37 


TABLE  11. 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

METRIC   MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF   THE   BAROMETER 

610  mm. 

HEIGHT   OF  THE   BAROMETER 

615  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

O.OO 

0.02 

0.04 

0.06 

0.08 

O.OO 

O.O2 

0.04 

0.06 

O.o8 

i 

.10 

.12 

.14 

.16 

.18 

.10 

.12 

.14 

.16 

.18 

2 

.20 

.22 

.24 

.26 

.28 

.20 

.22 

.24 

.26 

.28 

3 

•30 

•32 

•34 

•36 

.38 

•30 

•32 

•34 

•36 

•38 

4 

.40 

.42 

.44 

•46 

.48 

.40 

.42 

.44 

.46 

.48 

5 

0.50 

0.52 

0-54 

0.56 

0.58 

0.50 

0.52 

0-54 

0.56 

0.58 

6 

.60 

.62 

.64 

.66 

.68 

.60 

.62 

.64 

.66 

.68 

7 

.70 

•72 

•74 

•  76 

.78 

.70 

.72 

•  74 

.76 

.78 

8 

.80 

.82 

.84 

.86 

.88 

.80 

.82 

.84 

.86 

.88 

9 

.90 

.92 

•94 

.96 

.98 

.90 

.92 

•94 

.96 

•98 

10 

0.99 

1.  01 

1-03 

1.05 

1.07 

1.  00 

.02 

.04 

.06 

1.08 

ii 

.09 

I.  II 

I-I5 

1.17 

1.  10 

.12 

.14 

.16 

1.18 

12 

•19 

1.  21 

1.23 

1.25 

1.27 

1.20 

.22 

.24 

.26 

1.28 

13 

.29 

I.3I 

1-35 

•37 

1.30 

•32 

•34 

•36 

1.38 

14 

•39 

I.4I 

1-43 

i-45 

•47 

1.40 

•42 

•44 

.46 

1.48 

15 

•49 

I-5I 

•53 

•55 

•57 

•50 

•52 

•54 

•56 

1.58 

16 

•59 

1.61 

•63 

•65 

.67 

.60 

.62 

.64 

.66 

1.68 

17 

.69 

1.71 

•73 

•75 

•77 

.70 

.72 

•74 

1.76 

1.78 

18 

•79 

1.81 

•83 

•85 

•87 

.80 

.82 

.84 

.86 

1.88 

19 

.89 

1.91 

•93 

i-95 

•97 

.90 

•92 

•94 

.96 

1.98 

20 

1.99 

2.OI 

2.03 

2.05 

2.07 

2.00 

2.02 

2.04 

2.06 

2.08 

21 

2.09 

2.10 

2.12 

2.14 

2.16 

2.10 

2.12 

2.14 

2.16 

2.18 

22 

2.18 

2.20 

2.22 

2.24 

2.26 

2.20 

2.22 

2.24 

2.26 

2.28 

23 

2.28 

2.30 

2.32 

2-34 

2.36 

2.30 

2.32 

2-34 

2.36 

2.38 

24 

2.38 

2.40 

2.42 

2.44 

2.46 

2.40 

2.42 

2.44 

2.46 

2.48 

25 

2.48 

2.50 

2.52 

2-54 

2.56 

2.50 

2.52 

2-54 

2.56 

2.58 

26 

2.58 

2.60 

2.62 

2.64 

2.66 

2.60 

2.62 

2.64 

2.66 

2.68 

27 

2.68 

2.7O 

2.72 

2.74 

2.76 

2.70 

2.72 

2.74 

2.76 

2.78 

28 

2.78 

2.80 

2.82 

2.84 

2.86 

2.80 

2.82 

2.84 

2.86 

2.88 

29 

2.88 

2.90 

2.9I 

2-93 

2-95 

2.90 

2.92 

2.94 

2.96 

2.98 

30 

2.97 

2.99 

3.01 

3-03 

3-05 

3.00 

3.02 

3-04 

3.06 

3.08 

31 

3-07 

3-°9 

3.II 

3-13 

3-15 

3.10 

3.12 

3-14 

3.16 

3.18 

32 

3-17 

3-19 

3-21 

3-23 

3-25 

3.20 

3-22 

3-24 

3-26 

3-28 

33 

3-27 

3-29 

3-33 

3-35 

3-3° 

3-32 

3-34 

3.36 

3.38 

34 

3-37 

3-39 

3-41 

3-43 

3-45 

3-40 

3-42 

3-44 

346 

3.48 

35 

3-47 

3-49 

3-51 

3-53 

3-55 

3-49 

3-51 

3-53 

3-55 

3-57 

SMITHSONIAN  TABLES. 


TABLE  11. 

REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT  OP  THE  BAROMETER 

620  mm. 

HEIGHT  OP  THE  BAROMETER 

625  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

0.00 

O.O2 

0.04 

0.06 

0.08 

0.00 

0.02 

0.04 

O.o6 

0.08 

i 

.10 

.12 

.14 

.16 

.18 

.10 

.12 

.14 

.16 

.18 

2 

.20 

.22 

.24 

.26 

.28 

.20 

.22 

.24 

.27 

.29 

3 

•30 

•32 

•34 

.36 

.38 

.31 

«33 

•35 

•37 

•39 

4 

.40 

•43 

•45 

•47 

•49 

.41 

•43 

•45 

•47 

.49 

5 

0.51 

0-53 

0-55 

o.57 

0.59 

0.51 

0.53 

0.55 

o.57 

o.59 

6 

.61 

•63 

.65 

.67 

.69 

.61 

.63 

•65 

.67 

.69 

I 

.71 
.81 

•73 
•83 

•75 
.85 

•77 
.87 

•79 
.89 

.71 
.82 

% 

•B 

.78 
.88 

.80 
.90 

9 

.91 

•93 

•95 

•97 

•99 

.92 

•94 

.96 

.98 

I.OO 

10 

.01 

1.03 

1.05 

.07 

1.09 

I.O2 

.04 

1.06 

1.08 

I.IO 

n 

.11 

I-I3 

•15 

.17 

I.I9 

1.  12 

.14 

1.16 

1.18 

1.  20 

12 

.21 

1.23 

•25 

.27 

1.29 

1.22 

.24 

1.26 

1.28 

1.30 

13 

•31 

1-33 

•35 

•37 

i-39 

1.32 

•34 

1-37 

1-39 

1.41 

14 

.41 

1-43 

•46 

.48 

1.50 

1-43 

•45 

1.47 

1.49 

1.51 

15 

•52 

1-54 

.56 

.58 

1.60 

1-53 

•55 

1.57 

1-59 

1.61 

16 

.62 

1.64 

.66 

.68 

1.70 

1.63 

•65 

1.67 

1.69 

1.71 

17 
18 

.72 

.82 

1-74 
1.84 

.76 
.86 

•  78 
.88 

1.80 
1.90 

1-73 
1.83 

•75 
1.85 

1.77 
1.87 

L'g 

1.81 
1.91 

19 

.92 

1.94 

1.96 

.98 

2.OO 

1-93 

1.95 

1.97 

1.99 

2.OI 

20 

2.  02 

2.04 

2.06 

2.08 

2.10 

2.04 

2.06 

2.08 

2.10 

2.12 

21 

2.12 

2.14 

2.16 

2.18 

2.20 

2.14 

2.16 

2.18 

2.20 

2.22 

22 

2.22 

2.24 

2.26 

2.28 

2.30 

2.24 

2.26 

2.28 

2.30 

2.32 

23 

2.32 

2-34 

2.36 

2.38 

2.40 

2-34 

2.36 

2.38 

2.40 

2.42 

24 

2.42 

2.44 

2.46 

2.48 

2.50 

2-44 

2.46 

2.48 

2.50 

2.52 

25 

2.52 

2-54 

2.56 

2.58 

2.60 

2-54 

2.56 

2.58 

2.60 

2.62 

26 

2.62 

2.64 

2.66 

2.68 

2.70 

2.64 

2.66 

2.68 

2.70 

2.72 

27 

2.72 

2.74 

2.76 

2.78 

2.80 

2-74 

2.76 

2.78 

2.80 

2.82 

28 

2.82 

2.84 

2.86 

2.88 

2.90 

2.85 

2.87 

2.89 

2.91 

2.93 

29 

2.92 

2.94 

2.96 

2.98 

3-00 

2.95 

2.97 

2.99 

3.01 

3-03 

30 

3.02 

3-04 

3-06 

3-o8 

3-10 

3.05 

3.07 

3-09 

3." 

3.13 

3i 

3.12 

3.14 

3-i6 

3.18 

3-20 

3-15 

3-17 

3-19 

3-21 

3-23 

32 

-3-22 

3-24 

3.26 

3-28 

3.30 

3.25 

3-27 

3-29 

3-31 

3-33 

33 

3-32 

3-34 

3.36 

3.38 

3-40 

3-35 

3-37 

3-39 

3-41 

3-43 

34 

3-42 

3-44 

3'46 

3-48 

3.50 

3-45 

3-47 

3-49 

3-51 

3-53 

35 

3-52 

3-54 

3.56 

3.58 

3.60 

3-55 

3-57 

3-59 

3.6i 

3.63 

SMITHSONIAN  TABLES. 


39 


TABLE  11. 
REDUCTION   OF  THE   BAROMETER    TO    STANDARD    TEMPERATURE, 

METRIC     MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT  OF  THE  BAROMETER 

630  mm. 

HEIGHT  OF  THE  BAROMETER 

635  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

0.00 

0.02 

0.04 

0.06 

0.08 

0.00 

0.02 

0.04 

O.o6 

0.08 

I 

.10 

.12 

.14 

.16 

•19 

.IO 

.12 

•15 

•17 

•19 

2 

.21 

•23 

•25 

.27 

.29 

.21 

•23 

•25 

.27 

.29 

3 

•31 

•33 

•35 

•37 

•39 

•31 

•33 

•35 

•37 

•39 

4 

.41 

•43 

•45 

•47 

•49 

.41 

•44 

.46 

.48 

•50 

5 

0.51 

o.53 

0.56 

0.58 

0.60 

0-52 

o-54 

0.56 

0.58 

0.60 

6 

.62 

.64 

.66 

.68 

.70 

.62 

.64 

.66 

.68 

.70 

7 

.72 

•74 

.76 

•78 

.80 

•73 

•75 

•  77 

•79 

.81 

8 

.82 

.84 

.86 

.88 

.90 

•83 

•85 

•87 

•89 

•91 

9 

.92 

•95 

•97 

•99 

1.  01 

•93 

•95 

•97 

•99 

1.02 

10 

1.03 

•05 

1.07 

.09 

i.  ii 

1.04 

i.  06 

.08 

.10 

1.  12 

ii 

I.I3 

•15 

1.17 

.19 

1.  21 

1.14 

1.16 

.18 

.20 

1.22 

12 

1.23 

•25 

1.27 

•29 

I-3I 

1.24 

1.26 

.28 

•30 

•33 

13 

i-34 

•36 

1.38 

.40 

1.42 

1-35 

1-37 

•39 

.41 

•43 

14 

1.44 

.46 

1.48 

•50 

1.52 

1-45 

1.47 

•49 

•51 

•53 

15 

1-54 

.56 

1.58 

.60 

1.62 

i-55 

1-57 

i-59 

.61 

•63 

16 

1.64 

.66 

1.68 

.70 

1.72 

1.66 

1.68 

1.70 

.72 

•74 

17 

1.74 

•77 

1.79 

.81 

1.83 

1.76 

1.78 

i.  80 

.82 

1.84 

18 

1.85 

.87 

1.89 

1.91 

i-93 

1.86 

1.88 

1.90 

.92 

1.94 

19 

1-95 

•97 

1.99 

2.OI 

2.03 

1.96 

1.99 

2.01 

2.03 

2.05 

20 

2.05 

2.07 

2.09 

2.  II 

2.13 

2.07 

2.09 

2.  II 

2.13 

2.15 

21 

2.15 

2.17 

2.19 

2.21 

2.24 

2.17 

2.19 

2.21 

2.23 

2.25 

22 

2.26 

2.28 

2.30 

2.32 

2-34 

2.27 

2.29 

2.31 

2-34 

2.36 

23 

2.36 

2.38 

2.40 

2.42 

2.44 

2.38 

2.40 

2.42 

2.44 

2.46 

24 

2.46 

2.48 

2.50 

2.52 

2.54 

2.48 

2.50 

2.52 

2-54 

2.56 

25 

2.56 

2.58 

2.60 

2.62 

2.64 

2.58 

2.60 

2.62 

2.64 

2.66 

26 

2.66 

2.68 

2.70 

2-73 

2-75 

2.69 

2.71 

2.73 

2-75 

2.77 

27 

2.77 

2.79 

2.81 

2.83 

2.85 

2-79 

2.81 

2.83 

2.85 

2.87 

28 

2.87 

2.89 

2.91 

2-93 

2-95 

2.89 

2.91 

2-93 

2-95 

2.97 

29 

2.97 

2.99 

3-01 

3-°3 

3-05 

2.99 

3-oi 

3-03 

3-05 

3.08 

30 

3-07 

3.09 

3-ii 

3-13 

3-15 

3.10 

3.12 

3-14 

3-16 

3-i8 

31 

3-17 

3-!9 

3-2i 

3-23 

3-25 

3.20 

3-22 

3-24 

3-26 

3.28 

32 

3-28 

3-30 

3-32 

3-34 

3.36 

3-30 

3-32 

3-34 

3.36 

3.38 

33 

3.38 

3-40 

3-42 

3-44 

3.46 

3-40 

3-42 

3-44 

3-47 

3-49 

34 

3.48 

3-50 

3-52 

3-54 

3-56 

3-51 

3-53 

3-55 

3-57 

3-59 

35 

3.58 

3.6o 

3-62 

3-64 

3-66 

3-6i 

3-63 

3.65 

3-67 

3.69 

SMITHSONIAN  TABLES. 


TABLE  11. 
REDUCTION    OF  THE    BAROMETER  TO    STANDARD  TEMPERATURE. 

METRIC   MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF   THE   BAROMETER 

64O  mm. 

HEIGHT  OF  THE  BAROMETER 

645  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

o.oo 

O.O2 

0.04 

0.06 

0.08 

0.00 

0.02 

0.04 

0.06 

0.08  ' 

i 

.10 

•13 

•15 

•17 

.19 

.11 

•13 

.15 

•17 

.19 

2 

.21 

•23 

•25 

.27 

.29 

.21 

•23 

.25 

.27 

•29 

3 

•31 

•33 

.36 

.38 

.40 

•32 

•34 

.36 

•38. 

.40 

4 

.42 

•44 

•46 

.48 

•50 

.42 

•44 

.46 

.48 

•51 

5 

0.52 

0.54 

0.56 

0-59 

0.61 

0-53 

o.55 

0.57 

0-59 

0.61 

6 

.63 

•65 

•67 

.69 

•71 

•63 

•65 

.67 

.69 

.72 

7 

•73 

•75 

•77 

•79 

.81 

•74 

.76 

•78 

.80 

.82 

8 

•84 

.86 

.88 

.90 

.92 

•84 

.86 

.88 

.90 

•93 

9 

•94 

.96 

.98 

1.  00 

1.02 

•95 

•97 

•99 

I.OI 

1.03 

10 

1.04 

1.06 

1.09 

i.  ii 

I-I3 

1.05 

1.07 

1.09 

.12 

1.14 

ii 

I-I5 

1.17 

1.19 

I.2I 

1.23 

1.16 

1.18 

i.  20 

.22 

1.24 

12 

1-25 

1.27 

1.29 

I.3I 

•34 

1.26 

1.28 

1.30 

•32 

•35 

13 

1.36 

1.38 

1.40 

1.42 

•44 

1-37 

•39 

1.41 

•43 

•45 

14 

1.46 

1.48 

1.50 

1.52 

•54 

1.47 

•49 

i.5i 

•53 

•56 

15 

1.56 

1.59 

1.61 

1.63 

•65 

1.58 

.60 

1.62 

.64 

.66 

16 

1.67 

1.69 

1.71 

i.73 

•  75 

1.68 

.70 

1.72 

•74 

•  77 

17 

1.77 

1.79 

1.81 

1.83 

.86 

1.79 

.81 

1.83 

•85 

•87 

18 

1.88 

1.90 

1.92 

1.94 

.96 

1.89 

.91 

i-93 

•95 

•97 

19 

1.98 

2.00 

2.02 

2.04 

2.06 

2.OO 

2.02 

2.04 

2.06 

2.08 

20 

2.08 

2.10 

2.13 

2.15 

2.17 

2.10 

2.12 

2.14 

2.16 

2.18 

21 

2.19 

2.21 

2.23 

2.25 

2.27 

2.20 

2.23 

2.25 

2.27 

2.29 

22 

2.29 

2.31 

2-33 

2-35 

2-37 

2.31 

2-33 

2.35 

2-37 

2-39 

23 

2:40 

2.42 

2.44 

2.46 

2.48 

2.41 

2.43 

2.46 

2.48 

24 

2.50 

2.52 

2.54 

2.56 

2.58 

2.52 

2.54 

2.56 

2.58 

2.60 

25 

2.60 

2.62 

2.64 

2.66 

2.69 

2.62 

2.64 

2.66 

2.69 

2.71 

26 

2.71 

2.73 

2-75 

2.77 

2.79 

2-73 

2-75 

2.77 

2.79 

2.81 

27 

2.81 

2.83 

2.85 

2.87 

2.89 

2.83 

2.85 

2.87 

2.89 

2.92 

28 

2.91 

2-93 

2.95 

2.98 

3.00 

2.94 

2.96 

2.98 

3.00 

3.02 

29 

3-02 

3-04 

3-o6 

3.08 

3.10 

3-04 

3-o6 

3.08 

3.10 

3.12 

30 

3-12 

3-14 

3.16 

3-18 

3-20 

3-14 

3.17 

3-19 

3-21 

3-23 

31 

3-22 

3-24 

3-27 

3-29 

3-31 

3-25 

3-27 

3-29 

3-31 

3-33 

32 

3-33 

3-35 

3-37 

3-39 

3-41 

3-35 

3-37 

3-39 

3-42 

3-44 

33 

3-43 

3-45 

3-47 

3-49 

3.51 

3-46 

348 

3-50 

3-52 

3-54 

34 

3-53 

3-55 

3.58 

3.60 

3.62 

3.56 

3.58 

3-6o 

3-62 

3-64  j 

35 

3-64 

3-66 

3-68 

3-70 

3.72 

3-67 

3-69 

3-71 

3-73 

3-75  i 

SMITHSONIAN  TABLES. 


TABLE  11. 
REDUCTION    OF  THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

METRIC   MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF  THE  BAROMETER 

650  mm. 

HEIGHT  OF  THE  BAROMETER 

655  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

0.00 

0.02 

0.04 

O.o6 

0.08 

o.oo 

O.O2 

0.04 

O.o6 

0.09 

i 

.11 

•13 

•15 

.17 

•19 

.11 

•13 

•15 

•17 

•19 

2 

.21 

•23 

•25 

.28 

•30 

.21 

.24 

.26 

.28 

•3° 

3 

•32 

•34 

•36 

•38 

.40 

•32 

•34 

.36 

•39 

.41 

4 

.42 

•45 

•47 

•49 

•51 

•43 

•45 

•47 

•49 

•51 

5 

0-53 

o.55 

o.57 

o.59 

0.62 

o.53 

0.56 

0.58 

0.60 

0.62 

6 

.64 

.66 

.68 

.70 

.72 

.64 

.66 

.68 

71 

•73 

7 

•74 

•76 

.78 

.81 

•83 

•75 

•77 

•79 

.81 

•83 

8 
9 

•  85 
•95 

s 

.89 

1.  00 

1.02 

•93 
1.04 

•85 
.96 

.88 
•98 

.90 

1.  00 

•92 
1.03 

•94 
1.05 

10 

.06 

.08 

.10 

.12 

.14 

1.07 

1.09 

.11 

1-13 

I.I5 

ii 

•  17 

.19 

.21 

•23 

•25 

1.17 

.20 

.22 

1.24 

.26 

12 

.27 

.29 

•31 

•34 

•36 

1.28 

•30 

•32 

1-35 

•37 

13 

1.38 

.40 

.42 

•44 

.46 

i-39 

.41 

•43 

1-45 

•47 

14 

.48 

•50 

•53 

•55 

•57 

1-49 

•52 

•54 

1.56 

•58 

15 

•59 

.61 

•63 

.65 

1.67 

1.60 

1.62 

.64 

1.66 

.69 

16 

.69 

.72 

•74 

.76 

1.78 

1.71 

1-73 

•75 

1.77 

•79 

17 

.80 

.82 

.84 

.86 

1.88 

1.81 

1.84 

.86 

1.88 

.90 

18 

.91 

•93 

•95 

•97 

1.99 

1.92 

1.94 

.96 

1.98 

2.01 

19 

2.01 

2.03 

2.05 

2.07 

2.10 

2.03 

2.05 

2.07 

2.09 

2.II 

20 

2.12 

2.14 

2.16 

2.18 

2.  2O 

2.13 

2.15 

2.18 

2.  2O 

2.22 

21 

2.22 

2.24 

2.26 

2.29 

2.31 

2.24 

2.26 

2.28 

2.30 

2.32 

22 

2-33 

2-35 

2.37 

2-39 

2.41 

2-35 

2.37 

2.39 

2.41 

2.43 

23 

2.43 

2.45 

2.47 

2.50 

2.52 

2.45 

2«47 

2.49 

2.52 

2.54 

24 

2-54 

2.56 

2.58 

2.60 

2.62 

2.56 

2.58 

2.60 

2.62 

2.64 

25 

2.64 

2.66 

2.69 

2.71 

2.73 

2.66 

2.68 

2.71 

2-73 

2-75 

26 

2-75 

2-77 

2.79 

2.81 

2.83 

2.77 

2.79 

2.81 

2.83 

2.85 

27 

2.85 

2.87 

2.90 

2.92 

2-94 

2.88 

2.90 

2.92 

2.94 

2.96 

28 

2.96 

2.98 

3-oo 

3-02 

3-°4 

2.98 

3.00 

3-02 

3-05 

3-07 

29 

3-06 

3.08 

3.13 

3-15 

3-09 

3-13 

3-15 

3-17 

30 

3-17 

3.19 

3-2i 

3.23 

3-25 

3-19 

3.21 

3-24 

3-26 

3-28 

31 

3-27 

3-30 

3-32 

3-34 

3-36 

3-30 

3-32 

3-34 

3-36 

3.38 

32 

3.38 

3-40 

3-42 

3-44 

3-46 

3-4i 

3-43 

3-45 

3-47 

3-49 

33 

3-48 

3-51 

3-53 

3-55 

3-57 

3-53 

3-55 

3-57 

3-6o 

34 

3-59 

3.63 

3.65 

3-67 

If* 

3-64 

3-66 

3-68 

3-70 

35 

3.69 

3-71 

3-74 

3.76 

3-78 

3-72 

3-74 

3-76 

3-79 

3.8i 

SMITHSONIAN  TABLES. 


TABLE  11 
REDUCTION    OF  THE    BAROMETER  TO    STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT  OF  THE  BAROMETER 

660  mm. 

HEIGHT   OF   THE  BAROMETER 

665  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

O.OO 

0.02 

0.04 

O.o6 

0.09 

0.00 

0.02 

0.04 

0.07 

0.09 

i 

.11 

•13 

•15 

•17 

.19 

.11 

•13 

•15 

•17 

.20 

2 

.22 

.24 

.26 

.28 

•30 

.22 

.24 

.26 

.28 

•30 

3 

•32 

•34 

•37 

•39 

.41 

•33 

•35 

•37 

•39 

.41 

4 

•43 

•45 

•47 

•50 

•52 

•43 

.46 

.48 

•50 

.52 

5 

0-54 

0.56 

0.58 

0.60 

0.62 

o.54 

0.56 

o.59 

0.61 

0.63 

6 

•65 

.67 

.69 

•7i 

•73 

.65 

.67 

.69 

.72 

•74 

7 

•75 

.78 

.80 

.82 

.84 

.76 

.78 

.80 

.82 

•85 

8 

.86 

.88 

.90 

•93 

•95 

.87 

.89 

.91 

•93 

•95 

9 

•97 

•99 

I.OI 

1.03 

1.05 

.98 

I.OO 

1.02 

1.04 

1.06 

10 

1.08 

1.  10 

1.  12 

.14 

.16 

1.08 

i.  ii 

I-I3 

1-15 

1.17 

ii 

1.18 

1.  21 

1.23 

•25 

.27 

.19 

1.  21 

1.24 

1.26 

.28 

12 

.29 

I-3I 

i-33 

•36 

•38 

•30 

1-32 

1-34 

1-37 

•39 

13 

.40 

1.42 

1.44 

•46 

.48 

.41 

1-43 

1-45 

1.47 

•50 

14 

•51 

1-53 

L55 

•57 

•59 

•52 

i-54 

1-56 

1.58 

.60 

15 

.61 

1.63 

1.66 

.68 

.70 

•63 

1.65 

1.67 

1.69 

•7i 

16 

.72 

1.74 

1.76 

•78 

.81 

•73 

1.76 

1.78 

1.80 

.82 

17 

•83 

1.85 

1.87 

.89 

.91 

.84 

1.86 

1.88 

1.91 

•93 

18 

•93 

I.96 

1.98 

2.00 

2.02 

i-95 

1.97 

1.99 

2.01 

2.04 

J9 

2.04 

2.06 

2.08 

2.  II 

2.13 

2.06 

2.08 

2.IO 

2.12 

2.14 

20 

2.15 

2.17 

2.19 

2.21 

2.23 

2.17 

2.19 

2.21 

2.23 

2.25 

21 

2.26 

2.28 

2.30 

2.32 

2-34 

2.27 

2.29 

2.32 

2-34 

2.36 

22 

2.36 

2.38 

2.41 

2-43 

2-45 

2.38 

2.40 

2.42 

2-45 

2.47 

23 

2-47 

2.49 

2.51 

2-53 

2.56 

2.49 

2.51 

2-53 

2-55 

2-57 

24 

2.58 

2.60 

2.62 

2.64 

2.66 

2.60 

2.62 

2.64 

2.66 

2.68 

25 

2.68 

2.71 

2.73 

2.75 

2.77 

2.70 

2.73 

2-75 

2.77 

2.79 

26 

2.79 

2.81 

2.83 

2.85 

2.88 

2.81 

2.83 

2.85 

2.88 

2.90 

27 

2.90 

2.92 

2-94 

2.96 

2.98 

2.92 

2.94 

2.96 

2.98 

3.01 

28 

3.00 

3.03 

3-05 

3-07 

3-09 

3-03 

3-05 

3-07 

3-09 

3-n 

29 

3-n 

3.13 

3-15 

3-i8 

3-20 

3-13 

3-i6 

3-18 

3-20 

3-22 

30 

3.22 

3.24 

3-26 

3-28 

3-30 

3-24 

3-26 

3-29 

3-31 

3-35 

3i 

3-32 

3-35 

3-37 

3-39 

3-41 

3.35 

3-37 

3-39 

3-41 

3-44 

32 

3-43 

3-45 

3-47 

3-49 

3.52 

3-46 

3-48 

3-50 

3-52 

3-54 

33 

3-54 

3.56 

3-58 

3-6o 

3-62 

3.56 

3-59 

3-6i 

3.63 

3-65 

34 

3-64 

3-67 

3.69 

3-7i 

3-73 

3-67 

3.69 

3-71 

3-74 

3-76 

35 

3-75 

3-77 

3-79 

3-8i 

3-84 

3.78 

3.8o 

3-82 

3-84 

3-86 

SMITHSONIAN  TABLE*. 


43 


TABLE  11. 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE, 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT  OF  THE  BAROMETER 

67O  mm. 

HEIGHT  OF  THE  BAROMETER 

675  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

o.oo 

O.02 

0.04 

0.07 

0.09 

0.00 

O.O2 

0.04 

0.07 

0.09 

i 

.11 

•13 

•15 

.18 

.20 

.11 

•13 

•15 

.18 

.20 

2 

.22 

.24 

.26 

.28 

•31 

.22 

.24 

.26 

.29 

.31 

3 

•33 

•35 

•37 

•39 

.42 

•33 

•35 

•37 

.40 

.42 

4 

•44 

.46 

.48 

•50 

•53 

•44 

.46 

.48 

•51 

•53 

5 

0-55 

0-57 

0-59 

0.61 

0.63 

0-55 

o.57 

0.60 

0.62 

0.64 

6 

.66 

.68 

.70 

.72 

•74 

.66 

.68 

•7i 

•73 

•75 

7 

•  77 

•79 

.81 

•83 

•85 

•77 

•79 

.82 

.84 

.86 

8 

•87 

.90 

•92 

•94 

.96 

.88 

.90 

•93 

•95 

•97 

9 

.98 

1.  01 

1.03 

1.05 

1.07 

•99 

1.  01 

1.04 

1.06 

1.08 

10 

1.09 

.11 

1.14 

.16 

i.iS 

1.  10 

1.  12 

1.14 

1.17 

•19 

ii 

1.20 

.22 

1.25 

•  27 

1.29 

.21 

1-23 

1-25 

1.28 

•30 

12 

I-3I 

•33 

i-35 

•38 

1.40 

•32 

1-34 

1.36 

•39 

.41 

13 

1.42 

•44 

1.46 

•49 

1-51 

•43 

1-45 

1.47 

•50 

•52 

14 

1-53 

•55 

1-57 

•59 

1.62 

•54 

1.56 

1.58 

.61 

•63 

15 

>  1.64 

.66 

1.68 

1.70 

1.72 

1.65 

1.67 

1.69 

.72 

•74 

16 

1-75 

•  77 

1-79 

1.81 

1.83 

1.76 

1.78 

1.80 

•83 

•85 

17 

1.86 

.88 

1.90 

1.92 

1.94 

1.87 

1.89 

1.91 

1.94 

.96 

18 

1.96 

•99 

2.01 

2.03 

2.05 

1.98 

2.OO 

2.O2 

2.04 

2.07 

19 

2.07 

2.09 

2.12 

2.14 

2.16 

2.09 

2.II 

2.13 

2.15 

2.18 

20 

2.18 

2.20 

2.23 

2.25 

2.27 

2.20 

2.22 

2.24 

2.26 

2.29 

21 

2.29 

2.31 

2-33 

2.36 

2.38 

2.31 

2-33 

2-35 

2-37 

2-39 

22 

2.40 

2.42 

2.44 

2.46 

2.49 

2.42 

2.44 

2.46 

2.48 

2.50 

23 

2-51 

2-53 

2-55 

2.57 

2-59 

2-53 

2-55 

2-57 

2.59 

2.61 

24 

2.62 

2.64 

2.66 

2.68 

2.70 

2.64 

2.66 

2.68 

2.70 

2.72 

25 

2.72 

2-75 

2-77 

2.79 

2.81 

2.74 

2.77 

2-79 

2.81 

2.83 

26 

2.83 

2.85 

2.88 

2.90 

2.92 

2.85 

2.88 

2.90 

2.92 

2-94 

27 

2.94 

2.96 

2.98 

3.01 

3-03 

2.96 

2-99 

3.01 

3.03 

3-05 

28 

3-05 

3-07 

3-09 

3-" 

3-14 

3-07 

3-09 

3-12 

3-14 

3-i6 

29 

3-i6 

3-18 

3-20 

3-22 

3-24 

3-i8 

3-20 

3.23 

3-25 

3-27 

30 

3-27 

3-29 

3.31 

3-33 

3-35 

3-29 

3-31 

3-33 

3-36 

3-3? 

3i 

3-37 

3-40 

3.42 

3-44 

3-46 

3-40 

3-42 

3-44 

3-47 

3-49 

33 

3-48 

3-50 

3-53 

3-55 

3-57 

3-5i 

3-53 

3-55 

3-57 

3-6o 

33 

3-59 

3-6i 

3-63 

3-66 

3-68 

3-62 

3-64 

3-66 

3-68 

3-71 

34 

3-70 

3-72 

3-74 

3-76 

3-79 

3-73 

3-75 

3-77 

3.79 

3-81 

35 

3-8i 

3.83 

3.85 

3-87 

3-89 

3-84 

3.86 

3-88 

3-90 

3-92 

SMITHSONIAN  TABLES. 


44 


TABLE  11 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF  THE  BAROMETER 

680  mm. 

HEIGHT  OF  THE  BAROMETER 

685  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

O.OO 

O.O2 

0.04 

0.07 

0.09 

O.OO 

0.02 

0.04 

0.07 

0.09 

i 

.11 

.13 

.16 

.18 

.20 

.11 

•13 

.16 

.18 

.20 

2 

.22 

.24 

.27 

•29 

•31 

.22 

.25 

.27 

•29 

•31 

3 

•33 

.36 

•38 

.40 

.42 

•34 

•36 

•38 

.40 

•43 

4 

.44 

•47 

•49 

•51 

•53 

•45 

•47 

•49 

•51 

-      -54 

5 

0.56 

0.58 

0.60 

0.62 

0.64 

0.56 

0.58 

0.60 

0.63 

0.65 

6 

.67 

.69 

•7i 

•73 

.75 

•67 

.69 

•  72 

•74 

•76 

7 

.78 

.80 

.82 

.84 

•87 

•78 

.80 

•83 

•85 

•87 

8 

.89 

.91 

•93 

•95 

.98 

.89 

.92 

•94 

.96 

.98 

9 

1.  00 

1.02 

1.04 

1.06 

1.09 

r.oi 

1.03 

1.05 

1.07 

1.09 

10 

I.II 

I-I3 

•15 

1.18 

.20 

1.  12 

1.14 

1,16 

.18 

1.  21 

ii 

1.22 

1.24 

.26 

.29 

•31 

1.23 

1.25 

1.27 

•30 

•32 

12 

1-33 

1-35 

•37 

.40 

.42 

i-34 

1.36 

1.38 

.41 

•43 

13 

1.44 

1.46 

•49 

.51 

•53 

1-45 

1.47 

1.50 

•52 

•54 

14 

1.55 

1-57 

.60 

.62 

.64 

1.56 

1-59 

1.61 

•63 

•65 

15 

1.66 

1.68 

•7i 

•73 

•75 

1.67 

1.70 

1.72 

•74 

.76 

16 

1.77 

1.79 

.82 

.84 

.86 

1.79 

1.81 

1.83 

.85 

•87 

17 

1.88 

1.91 

•93 

•95 

•97 

1.90 

1.92 

1.94 

-96 

•99 

18 

1.99 

2.  02 

2.04 

2.06 

2.08 

2.01 

2.03 

2.05 

2.07 

2.10 

19 

2.  IO 

2.13 

2.15 

2.17 

2.19 

2.12 

2.14 

2.16 

2.19 

2.21 

20 

2.21 

2.24 

2.26 

2.28 

2.30 

2.23 

2.25 

2.27 

2.30 

2.32 

21 

2.32 

2-35 

2-37 

2-39 

2.41 

2-34 

2.36 

2-39 

2.41 

2-43 

22 

2-43 

2.46 

2.48 

2.50 

2.52 

2-45 

2-47 

2.50 

2.52 

2-54 

23 

2.54 

2-57 

2-59 

2.61 

2.63 

2.56 

2.59 

2.61 

2.63 

2.65 

24 

2.66 

2.68 

2.70 

2.72 

2.74 

2.67 

2.70 

2.72 

2-74 

2.76 

25 

2.77 

2.79 

2.81 

2.83 

2.85 

2.79 

2.81 

2.83 

2.85 

2.87 

26 

2.88 

2.90 

2.92 

2.94 

2.96 

2.90  • 

2.92 

2.94 

2.96 

2.99 

27 

2.99 

3-01 

3.03 

3.05 

3-07 

3.01 

3.03 

3-°5 

3-07 

3.10 

28 

3.10 

3-12 

3.14 

3.16 

3.18 

3.12 

3.14 

3.16 

3.18 

3-21 

29 

3.21 

3-23 

3-25 

3.27 

3-29 

3-23 

3.25 

3-27 

3-30 

3-32 

30 

3.32 

3-34 

3.36 

3.38 

3-40 

3-34 

3.36 

3.38 

3-41 

3-43 

31 

3-43 

3-45 

3-47 

3.49 

3-51 

3-45 

3.47 

3-49 

3-52 

3-54 

32 

3-54 

3.56 

3.58 

3-62 

3.56 

3.58 

3-61 

3.63 

3-65 

33 

3-64 

3.67 

3-69 

3.71 

3-73 

3.67 

3.69 

3-72 

3-74 

3-76 

34 

3-75 

3-78 

3-8o 

3-82 

3-84 

3-78 

3.80 

3.83 

3-85 

3-87 

35 

3-86 

3-89 

3.9i 

3-93 

3-95 

3-89 

3.91 

3-94 

3.96 

3.98 

SMITHSONIAN  TABLES. 


45 


TABLE  11. 

REDUCTION    OF  THE   BAROMETER    TO   STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT  OF  THE  BAROMETER 

69O  mm. 

HEIGHT   OF  THE    BAROMETER 

695  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

0.00 

O.O2 

0.05 

0.07 

0.09 

o.oo 

O.O2 

0.05 

0.07 

0.09 

i 

.11 

.14 

.16 

.18 

.20 

.11 

•14 

.16 

.18 

.20 

2 

•23 

•25 

.27 

.29 

•32 

•23 

•25 

•27 

•30 

•32 

3 

•34 

•36 

•38 

.41 

•43 

•34 

•36 

•39 

.41 

•43 

4 

•45 

•47 

•50 

•52 

•54 

•45 

.48 

•50 

•52 

•54 

5 

0.56 

0-59 

0.61 

0.63 

0.65 

o.57 

0-59 

0.61 

0.64 

0.66 

6 

.68 

.70 

.72 

•74 

•77 

.68 

.70 

•73 

•75 

•77 

7 

•79 

.81 

•83 

.86 

.88 

•79 

.82 

.84 

.86 

.88 

8 

.90 

.92 

•95 

•97 

•99 

.91 

•93 

•95 

.98 

1.  00 

9 

1.  01 

1.04 

1.06 

i.  08 

1.  10 

1.02 

1.04 

1.07 

1.09 

i.  ii 

10 

*.*3 

1-15 

1.17 

1.19 

1.22 

1.13 

.16 

.18 

i.  20 

1.22 

ii 

1.24 

i.  '26 

1.28 

I-3I 

i-33 

1.25 

•27 

•29 

1.31 

i-34 

12 

i-35 

1-37 

i-39 

1.42 

1.44 

1.36 

•38 

.41 

1-43 

1-45 

13 

1.46 

1.48 

1-51 

1.53 

1-55 

1.47 

•50 

.52 

i.54 

1.56 

14 

1-57 

1.60 

1.62 

1.64 

1.66 

1.59 

.61 

•63 

1.65 

1.68 

15 

1.69 

1.71 

1-73 

1-75 

1.78 

1.70 

.72 

1.74 

1.77 

1.79 

16 

1.80 

1.82 

1.84 

1.87 

1.89 

1.81 

•83 

1.86 

1.88 

1.90 

17 

1.91 

1-93 

1.96 

1.98 

2.00 

1.92 

•95 

1.97 

1.99 

2.01 

18 

2.O2 

2.05 

2.07 

2.09 

2.  II 

2.04 

2.06 

2.08 

2.  II 

2.13 

19 

2.13 

2.16 

2.18 

2.20 

2.22 

2.15 

2.17 

2.20 

2.22 

2.24 

20 

2.25 

2.27 

2.29 

2.31 

2-34 

2.26 

2.29 

2.31 

2-33 

2-35 

21 

2.36 

2.38 

2.40 

2-43 

2-45 

2.38 

2.40 

2.42 

2.44 

2-47 

22 

2.47 

2.49 

2.52 

2-54 

2.56 

2.49 

2.51 

2.53 

2.56 

2.58 

23 

2.58 

2.60 

2.63 

2.65 

2.67 

2.60 

2.62 

2.65 

2.67 

2.69 

24 

2.69 

2.72 

2.74 

2.76 

2.78 

2.71 

2.74 

2.76 

2.78 

2.80 

25 

2.81 

2.83 

2.85 

2.87 

2.90 

2.83 

2.85 

2.87 

2.89 

2.92 

26 

2.92 

2.94 

2.96 

2.99 

2-94 

2.96 

2.98 

3.01 

3.03 

27 

3.03 

3.05 

3-07 

3-10 

3-12 

3.05 

3.07 

3.10 

3-12 

3-14 

28 

3.14 

3-i6 

3-19 

3-21 

3-23 

3.19 

3.21 

3-23 

3-25 

29 

3.25 

3-27 

3-30 

3-32 

3-34 

3^28 

3-30 

3-32 

3-34 

3-37 

30 

3.36 

3-39 

3-41 

3-43 

3-45 

3.39 

3-41 

3-43 

346 

3.48 

31 

3.48 

3-50 

3.52 

3-54 

3-56 

3.50 

3-52 

3-55 

3-57 

3-59 

32 

3.59 

3.6i 

3.63 

3.65 

3-68 

3-61 

3.66 

3-68 

3-70 

33 

3.70 

3.72 

3-74 

3-77 

3-79 

3-73 

3-75 

3-77 

3-79 

3-81 

34 

3.83 

3-85 

3-88 

3-90 

3-84 

3-86 

3-88 

3.90 

3-93 

35 

3.92 

3-94 

3-97 

3-99 

4.01 

3-95 

3-97 

3.99 

4.02 

4.04 

SMITHSONIAN  TABLES. 


46 


TABLE   11. 
REDUCTION    OF  THE    BAROMETER   TO   STANDARD  TEMPERATURE. 

METRIC    MEASURES. 


FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT  OF  THE  BAROMETER 

700  mm. 

'     HEIGHT  OP  THE  BAROMETER 

705  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

i 

0.00 

.11 

O.O2 
.14 

0.05 
.16 

0.07 
.18 

0.09 
.21 

0.00 
.12 

0.02 

.14 

0.05 
.16 

0.07 
.18 

0.09 
.21 

2 

•23 

•25 

.27 

•30 

•32 

•23 

•25 

.28 

•30 

•32 

3 

•34 

•37 

•39 

.41 

•43 

•35 

•37 

•39 

.41 

•44 

4 

.46 

.48 

•50 

•53 

•55 

.46 

.48 

•Si 

•53 

;55 

5 

o-57 

0-59 

0.62 

0.64 

0.66 

0.58 

0.60 

0.62 

0.64 

0.67 

6 

.69 

•  71 

•73 

•75 

.78 

.69 

•71 

•74 

.76 

•78 

7 

.80 

.82 

•85 

.87 

.89 

.81 

.83 

.85 

.87 

.90 

8 

•9i 

.94 

.96 

.98 

1.  00 

.92 

•94 

•97 

•99 

.01 

9 

1.03 

1.05 

1.07 

I.IO 

1.  12 

1.04 

1.06 

1.08 

I.IO 

•13 

10 

1.14 

.16 

•19 

1.  21 

1.23 

i.i5 

1.17 

1.20 

.22 

.24 

ii 

1.26 

.28 

•30 

1.32 

i-35 

1.26 

1.29 

L3I 

•33 

•36 

12 

1-37 

•39 

.42 

1.44 

1.46 

1.38 

1.40 

1-43 

•45 

•47 

J3 

1.48 

•51 

•53 

i-55 

i-57 

1.49 

1.52 

1-54 

•56 

i-59 

14 

1.60 

.62 

.64 

1.67 

1.69 

I.6I 

1.63 

1.65 

.68 

1.70 

15 

1.71 

•73 

.76 

1.78 

1.80 

1.72 

1-75 

1.77 

•79 

1.81 

16 

1.82 

.85 

.87 

1.89 

1.92 

1.84 

1.86 

1.88 

.91 

i-93 

i? 

1.94 

.96 

.98 

2.OI 

2.03 

1-95 

1.98 

2.OO 

2.  02 

2.04 

18 

2.05 

2.07 

2.IO 

2.12 

2.14 

2.07 

2.09 

2.II 

2.14 

2.16 

19 

2.17 

2.19 

2.21 

2.23 

2.26 

2.18 

2.20 

2.23 

2.25 

2.27 

20 

2.28 

2.30 

2.32 

2-35 

2-37 

2.30 

2.32 

2.34 

2.36 

2-39 

21 

2-39 

2.42 

2.44 

2.46 

2.48 

2.41 

2-43 

2.46 

2.48 

2.50 

22 

2.51 

2.53 

2-55 

2-57 

2.60 

2.52 

2-55 

2-57 

2-59 

2.62 

23 

2.62 

2.64 

2.67 

2.69 

2.71 

2.64 

2.66 

2.68 

2.71 

2.73 

24 

2-73 

2.76 

2.78 

2.80 

2.82 

2.75 

2.78 

2.80 

2.82 

2.84 

25 

.  2.85 

2.87 

2.89 

2.9I 

2-94 

2.87 

2.89 

2.91 

2.94 

2.96 

26 

2.96 

2.98 

3.01 

3-03 

3-05 

2.98 

3.00 

3-03 

3-05 

3-07 

27 

3-07 

3.10 

3.12 

3-14 

3-i6 

3.10 

3.12 

3-^4 

3-16 

3-19 

28 

3-19 

3-2i 

3-23 

3-25 

3-28 

3-21 

3.23 

3-25 

3-28 

3-30 

29 

3-30 

332 

3-34 

3-37 

3-39 

3.32 

3-35 

3-37 

3-39 

3-4i 

30 

3-4i 

3-44 

346 

348 

3-50 

'  3-44 

3.46 

3.48 

3-51 

3-53 

31 

3-53 

3-55 

3-57 

3-59 

3-62 

3-55 

3-57 

3-6o 

3-62 

3-64 

32 

3-64 

3-66 

3.68 

3-7i 

3-73 

3-66 

3.69 

3-71 

3-73 

3-76 

33 

3-75 

3-77 

3-8o 

3-82 

3-84 

3-78 

3-80 

3-82 

3-85 

3-87 

34 

3-87 

3-89 

3-9i 

3-93 

3.96 

3-89 

3-92 

3-94 

3.96 

3.98 

35 

3-98 

4.00 

4.02 

4-05 

4.07 

4.01 

4-03 

4-05 

4.07 

4.10 

SMITHSONIAN  TABLES. 


47 


TABLE  11. 
REDUCTION    OF   THE    BAROMETER  TO  STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT  OF  THE  BAROMETER 

710  mm. 

HEIGHT  OF  THE  BAROMETER 

715  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

0.00 

O.O2 

0.05 

0.07 

0.09 

0.00 

0.02 

0.05 

0.07 

0.09 

i 

.12 

.14 

.16 

•19 

.21 

.12 

.14 

.16 

.19 

.21 

2 

•23 

.26 

.28 

•30 

•32 

•23 

.26 

.28 

•30 

•33 

3 

•35 

•37 

•39 

.42 

•44 

•35 

•37 

.40 

.42 

•44 

4 

.46 

•49 

•53 

.56 

•47 

•49 

•51 

•54 

.56 

5 

0.58 

0.60 

0.63 

0.65 

0.67 

0.58 

0.61 

0.63 

0.65 

0.68 

6 

.70 

•72 

•74 

•76 

•79 

.70 

•72 

•75 

•77 

•79 

7 

.81 

•83 

.86 

.88 

.90 

.82 

.84 

.86 

•89 

8 

•93 

•95 

•97 

1.  00 

i.  02 

•93 

.96 

.98 

1.  00 

1.03 

9 

1.04 

1.07 

1.09 

i.  ii 

1-13 

1.05 

1.07 

1.  10 

1.  12 

1.14 

10 

.16 

.18 

1.20 

•23 

•25 

1.17 

•19 

.21 

1.24 

1.26 

ii 

•27 

•30 

1-32 

•34 

•37 

1.28 

•31 

•33 

1-35 

1.38 

12 

•39 

.41 

1.44 

.46 

•48 

1.40 

.42 

•45 

1.47 

1.49 

13 

•50 

•53 

i-55 

•57 

.60 

1.52 

•54 

•56 

1.58 

1.61 

14 

.62 

.64 

1.67 

.69 

•7i 

1-63 

•65 

.68 

1.70 

1.72 

15 

.     -74 

1.76 

1.78 

.80 

•83 

1-75 

1-77 

1.79 

1.82 

1.84 

16 

•85 

1.87 

1.90 

•92 

•94 

1.86 

1.89 

1.91 

1.93 

1.96 

17 

•97 

1.99 

2.01 

2.04 

2.06 

1.98 

2.OO 

2.03 

2.05 

2.07 

18 

2.08 

2.10 

2.13 

2.15 

2.17 

2.10 

2.12 

2.14 

2.17 

2.19 

19 

2.20 

2.22 

2.24 

2.27 

2.29 

2.21 

2.24 

2.26 

2.28 

2.30 

20 

2.31 

2-33 

2.36 

2.38 

2.40 

2.33 

2-35 

2-37 

2.40 

2.42 

21 

2-43 

2-45 

2.47 

2.50 

2.52 

2.44 

2.47 

2.49 

2.51 

2-54 

22 

2-54 

2-57 

2-59 

2.61 

2.63 

2.56 

2.58 

2.61 

2.63 

2.65 

23 
24 

2.66 

2-77 

2.68 
2.80 

2.70 
2.82 

2.73 
2.84 

2-75 
2.86 

2.68 
2.79 

2.70 

2.81 

2.84 

22.ii 

2.77 
2.88 

25 

2.89 

2.91 

2.93 

2.96 

2.98 

2.91 

2.93 

2.95 

2.98 

3.00 

26 

3.00 

3-03 

3-05 

3-07 

3-09 

3.02 

3.05 

3-07 

3-09 

3.12 

27 

3.12 

3-14 

3-16 

3-19 

3.21 

3-14 

3.16 

3-19 

3-21 

3-23 

28 

3-23 

3-25 

3-28 

3-30 

3-32 

3-25 

3.28 

3-30 

3.32 

3-35 

29 

3-35 

3-37 

3-39 

3-42 

3-44 

3-37 

3-39 

3-42 

3-44 

3.46 

30 

346 

3-48 

3-51 

3-53 

3-55 

3-49 

3-51 

3-53 

3.56 

3.58 

31 

3'58 

3-60 

3-62 

3-65 

3-67 

3-62 

3-65 

3-67 

3-69 

32 

3-69 

3-7i 

3-74 

3-76 

3-78 

3-72 

3-74 

3-76 

3-79 

3-81 

33 

3-8i 

3-83 

3-85 

3-87 

3-90 

3.83 

3-86 

3-88 

3-90 

3-92 

34 

3-92 

3-94 

3-97 

3-99 

4.01 

3-95 

3-97 

3-99 

4.02 

4.04 

35 

4-03 

4.06 

4.08 

4.10 

4-13 

4.06 

4.09 

4.  ii 

4-13 

4.16 

SMITHSONIAN  TABLES. 


48 


TABLE  11, 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT  OF  THE  BAROMETER 

72O  mm. 

HEIGHT  OF  THE  BAROMETER 

725  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

o.oo 

O.O2 

0.05 

0.07 

0.09 

O.OO 

O.O2 

0.05 

0.07 

0.09 

i 

.12 

.14 

.16 

•19 

.21 

.12 

.14 

•  17 

•!9 

.21 

2 

.24 

.26 

.28 

•31 

•33 

.24 

.26 

.28 

•31 

•33 

3 

•35 

.38 

.40 

.42 

•45 

.36 

.38 

.40 

•43 

•45 

4 

•47 

•49 

•52 

•54 

•56 

•47 

.50 

•52 

•54 

.•57 

5 

0-59 

0.61 

0.63 

0.66 

0.68 

0-59 

0.62 

0.64 

0.66 

0.69 

6 

•71 

•73 

•75 

.78 

.80 

•  7i 

•73 

.76 

•78 

.80 

7 

.82 

•85 

•87 

.89 

•92 

•83 

•85 

.88 

.90 

.92 

8 

•94 

.96 

•99 

1.  01 

1.03 

•95 

•97 

•99 

i.  02 

1.04 

9 

i.  06 

1.08 

1.  10 

1-13 

1.15 

1.06 

1.09 

i.  ii 

1.14 

1.16 

10 

1.17 

i.  20 

1.22 

1.24 

1.27 

.18 

1.  21 

1.23 

1.25 

1.28 

ii 

1.29 

1-31 

1-34 

1.36 

i-39 

•30 

1.32 

i-35 

i-37 

i-39 

12 

1.41 

•43 

1.46 

1.48 

1.50 

.42 

1.44 

1.47 

1.49 

i-5i 

13 

i-53 

•55 

i-57 

1.60 

1.62 

•54 

1.56 

1.58 

1.61 

1.63 

14 

1.64 

•67 

1.69 

1.71 

1.74 

•65 

1.68 

1.70 

1-73 

1-75 

15 

1.76 

•78 

1.81 

1.83 

1.85 

•77 

1.80 

1.82 

1.84 

1.87 

16 

1.88 

.90 

1.92 

1-95 

1.97 

.89 

1.91 

1.94 

1.96 

1.98 

17 

1.99 

2.02 

2.04 

2.06 

2.09 

2.01 

2.03 

2.05 

2.08 

2.10 

18 

2.  II 

2.13 

2.16 

2.18 

2.20 

2.13 

2.15 

2.17 

2.20 

2.22 

19 

2.23 

2.25 

2.27 

2.30 

2.32 

2.24 

2.27 

2.29 

2.3I 

2-34 

20 

2-34 

2-37 

2-39 

2.41 

2-44 

2.36 

2.38 

2.41 

2-43 

2-45 

21 

2.46 

2.48 

2.51 

2-53 

2-55 

2.48 

2.50 

2-53 

2-55 

2-57 

22 

2.58 

2.60 

2.62 

2.65 

2.67 

2.6O 

2.62 

2.64 

2.67 

2.69 

23 

2.69 

2.72 

2.74 

2.76 

2-79 

2.71 

2.74 

2.76 

2.78 

2.8l 

24 

2.81 

2.83 

2.86 

2.88 

2.90 

2.83 

2.85 

2.88 

2.90 

2.92 

25 

2.93 

2-95 

2-97 

3.00 

3.02 

2-95 

2.97 

3.00 

3.02 

3-04 

26 

3-04 

3-07 

3-09 

3-H 

3-14 

3-07 

3-09 

3-H 

3-14 

3-16 

27 

3.16 

3-i8 

3-21 

3-23 

3-25 

3-18 

3-21 

3-23 

3-25 

3-28 

28 

3.28 

3-30 

3.32 

3-35 

3-37 

3-30 

3-32 

3-35 

3-37 

3-39 

29 

3.39 

3.42 

3-44 

3-46 

3-49 

3-42 

3-44 

3-46 

3-49 

3-51 

30 

3.51 

3-53 

3-56 

3.58 

3-6o 

3-53 

3-56 

3-58 

3-6o 

3.63 

3i 

3.63 

3-65 

3-67 

3-70 

3-72 

3-65 

3-68 

3-70 

3-72 

3-75 

32 

3-74 

3-77 

3-79 

3-81 

3-84 

3-77 

3-79 

3-82 

3-84 

3-86 

33 

3.86 

3-88 

3-91 

3-93 

3-95 

3-89 

3-91 

3-93 

3.96 

3-98 

24 

3.98 

4.00 

4.02 

4-05 

4.07 

4.00 

4-03 

4-05 

4.07 

4.10 

35 

4.09 

4.11 

4.14 

4.16 

4.18 

4.12 

4.14 

4.17 

4.19 

4.21 

SMITHSONIAN  TABLES. 


49 


TABLE  11. 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT  OP  THE  BAROMETER 

730  mm. 

HEIGHT  OF  THE  BAROMETER 

735  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

o.oo 

O.02 

0.05 

0.07 

0.10 

O.OO 

0.02 

0.05 

0.07 

O.IO 

I 

.12 

.14 

•17 

•19 

.21 

.12 

.14 

•17 

.19 

.22 

2 

.24 

.26 

.29 

•31 

•33 

.24 

.26 

.29 

•31 

•34 

3 

.36 

.38 

.41 

•43 

•45 

.36 

.38 

.41 

•43 

.46 

4 

.48 

•50 

•52 

•55 

•57 

.48 

•50 

•53 

•55 

•  58 

5 

0.60 

0.62 

0.64 

0.67 

0.69 

0.60 

0.62 

0.65 

0.67 

0.70 

6 

•71 

•74 

.76 

•79 

.81 

•72 

•74 

•77 

•79 

.82 

7 

.83 

.86 

.88 

.91 

•93 

.84 

.86 

.89 

.91 

•94 

8 

•95 

.98 

.00 

.02 

1.05 

.96 

•98 

.01 

1.03 

1.06 

9 

1.07 

1.  10 

.12 

.14 

1.17 

1.08 

1.  10 

•13 

I.I5 

1.17 

10 

.19 

.21 

.24 

.26 

1.29 

i.  20 

.22 

•25 

1.27 

1.29 

ii 

•31 

•33 

.36 

•38 

1.40 

1.32 

•34 

•37 

i-39 

1.41 

12 

•43 

•45 

.48 

•50 

1.52 

•44 

•46 

•49 

1.51 

i-53 

13 

•55 

-57 

•59 

.62 

1.64 

•56 

•58 

.61 

1.63 

1.65 

14 

.67 

.69 

•71 

•74 

1.76 

.68 

.70 

•72 

1-75 

1.77 

15 

.78 

1.81 

•83 

.86 

1.88 

.80 

1.82 

.84 

1.87 

1.89 

16 

.90 

i-93 

•95 

•97 

2.00 

•92 

1.94 

.96 

1.99 

2.01 

17 

2.  02 

2.05 

2.07 

2.09 

2.12 

2.04 

2.06 

2.08 

2.  II 

2.13 

18 

2.14 

2.16 

2.19 

2.21 

2.23 

2.15 

2.18 

2.20 

2.23 

2.25 

19 

2.26 

2.28 

2.31 

2-33 

2-35 

2.27 

2.30 

2.32 

2-35 

2-37 

20 

2.38 

2.40 

2.42 

2-45 

2.47 

2-39 

2.42 

2.44 

2.46 

2-49 

21 

2.50 

2.52 

2.54 

2-57 

2-59 

2-51 

2.54 

2.56 

2.58 

2.61 

22 

2.61 

2.64 

2.66 

2.68 

2.71 

2.63 

2.66 

2.68 

2.70 

2.73 

23 

2.73 

2.76 

2.78 

2.80 

2.83 

2-75 

2.77 

2.80 

2.82 

2.85 

24 

2.85 

2.87 

2.90 

2.92 

2.94 

2.87 

2.89 

2.92 

2.94 

2.97 

25 

2.97 

2.99 

3-02 

3-04 

3-06 

2.99 

3-oi 

3-04 

3-06 

3.08 

26 

3.09 

3-H 

3.13 

3-i6 

3-18 

3-n 

3-13 

3-i6 

3.18 

3-20 

27 

3.20 

3-23 

3-25 

3-28 

3-30 

3-23 

3-25 

3-27 

3-30 

3.32 

28 

3-32 

3-35 

3-37 

3-39 

3-42 

3-35 

3-37 

3-39 

3-42 

3-44 

29 

3.44 

3-46 

3-49 

3-51 

3-54 

3-46 

3-49 

3-51 

3-54 

3.56 

30 

3.56 

3-58 

3-6i 

3.63 

3-65 

3.58 

3-6i 

3.63 

3-65 

3-68 

3i 

3.68 

3-70 

3-72 

3-75 

3-77 

3-70 

3-73 

3-75 

3-77 

3-8o 

32 

3-79 

3-82 

3.84 

3.87 

3-89 

3-82 

3-84 

3-87 

3-89 

3-92 

33 

3-9i 

3-94 

3.96 

3-98 

4.01 

3-94 

3-96 

3-99 

4.01 

•  4-03 

34 

4-03 

4-05 

4.08 

4.10 

4.12 

4.06 

4.08 

4.11 

4-13 

4-15 

35 

4-15 

4.17 

4.20 

4.22 

4.24 

4.18 

4.20 

4.22 

4-25 

4.27 

SMITHSONIAN  TABLES. 


TABLE  11 
REDUCTION    OF  THE    BAROMETER  TO  STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF   THE   BAROMETER 

740  mm. 

HEIGHT  OP  THE  BAROMETER 

745  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

0.00 

0.02 

0.05 

0.07 

0.10 

o.oo 

O.O2 

0.05 

0.07 

0.10 

I 

.12 

.15 

•17 

.19 

.22 

.12 

.15 

•17 

.19 

.22 

2 

.24 

•27 

.29 

•31 

•34 

.24 

.27 

.29 

.32 

•34 

3 

.36 

•39 

.41 

.44 

.46 

•37 

•39 

.41 

.44 

.46 

4 

.48 

•51 

•53 

.56 

.58 

.49 

•51 

•54 

.56 

.      .58 

5 

O.6O 

0.63 

0.65 

0.68 

0.70 

0.61 

0.63 

0.66 

0.68 

0.71 

6 

.72 

•75 

•  77 

.80 

.82 

•73 

•  75 

.78 

.80 

•S3 

7 

.85 

.87 

.89 

.92 

•94 

.85 

.88 

.90 

.92 

•95 

8 

•97 

.99 

1.  01 

1.04 

1.06 

•97 

1.  00 

1.02 

1.05 

.07 

9 

1.09 

i.  ii 

1-13 

1.16 

1.18 

1.09 

1.  12 

I.I4 

1.17 

.19 

10 

1.  21 

•23 

1.26 

1.28 

1.30 

1.22 

1.24 

1.26 

1.29 

.31 

ii 

i-33 

i-35 

1.38 

1.40 

1.42 

1.34 

1.36 

1.38 

1.41 

•43 

12 

i-45 

•47 

1.50 

1.52 

1-54 

1.46 

1.48 

I-5I 

1-53 

•55 

13 

1-57 

•59 

1.62 

1.64 

1.66 

1.58 

1.60 

1.63 

1.65 

1.68 

14 

1.69 

•71 

1.74 

1.76 

1.78 

1.70 

1.72 

1.75 

1.77 

1.80 

15 

1.81 

1.83 

1.86 

1.88 

1.90 

1.82 

1.85 

1.87 

1.89 

1.92 

16 

i-93 

i-95 

1.98 

2.OO 

2.03 

1.94 

1.97 

1.99 

2.01 

2.04 

17 

2.05 

2.07 

2.10 

2.12 

2-15 

2.06 

2.09 

2.  II 

2.14 

2.16 

18 

2.17 

2.19 

2.22 

2.24 

2.27 

2.18 

2.21 

2.23 

2.26 

2.28 

19 

2.29 

2.31 

2-34 

2.36 

2-39 

2.31 

2-33 

2-35 

2.38 

2.40 

20 

2.41 

2-43 

2.46 

2.48 

2.51 

2-43 

2-45 

2-47 

2.50 

2.52 

21 

2.53 

2-55 

2.58 

2.6o 

2.63 

2-55 

2-57 

2.59 

2.62 

2.64 

22 

2.65 

2.67 

2.70 

2.72 

2-75 

2.67 

2.69 

2.72 

2.74 

2.76 

23 

2.77 

2.79 

2.82 

2.84 

2.87 

2-79 

2.81 

2.84 

2.86 

2.88 

24 

2.89 

2.91 

2.94 

2.96 

2.99 

2.91 

2.93 

2.96 

2.98 

3.01 

25 

3.01 

3-03 

3.06 

3.08 

3-H 

3-03 

3.05 

3.08 

3.10 

3.13 

26 

3-13 

3-15 

3-18 

3-20 

3.22 

3-15 

3.17 

3-20 

3-22 

3.25 

27 

3-25 

3-27 

3-30 

3-32 

3-34 

3-27 

3.29 

3.32 

3.34 

3-37 

.      28 

3-37 

3-39 

3-42 

3-44 

3-46 

3-39 

3-42 

3.44 

3.46 

3-49 

29 

3-49 

3-51 

3-54 

3-56 

3.58 

3-51 

3.54 

3.56 

3.58 

3.61 

30 

3.61 

3.63 

3-66 

3-68 

3-70 

3.63 

3-66 

3.68 

3.70 

3.73 

3i 

3-73 

3-75 

3-78 

3.80 

3-82 

3-75 

3-78 

3.80 

3-82 

3.85 

32 

3-85 

3.87 

3.89 

3-92 

3-94 

3.87 

3-90 

3-92 

3-95 

3-97 

33 
34 

3-97 
4.09 

3-99 
4.11 

4.01 
4-13 

4.04 
4.16 

4.06 
4.18 

3-99 
4.11 

4.02 
4.14 

4.04 
4.16 

4.07 
4.19 

4.09 
4.21 

35 

4.21 

4-23 

4-25 

4.28 

4.30 

4-23 

4.26 

4.28 

4.31 

4-33 

SMITHSONIAN  TABLES. 


TABLE  11. 
REDUCTION   OF  THE   BAROMETER    TO    STANDARD    TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT  OF  THE  BAROMETER 

750  mm. 

HEIGHT   OF  THE  BAROMETER 

755  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

0.00 

0.02 

0.05 

0.07 

O.IO 

0.00 

0.02 

0.05 

0.07 

O.IO 

i 

.12 

•15 

•17 

.20 

.22 

.12 

•15 

•17 

.20 

.22 

2 

•25 

.27 

•29 

•32 

•34 

-25 

•27 

•30 

•32 

•35 

3 

•37 

•39 

.42 

.44 

•47 

•37 

•39 

.42 

.44 

•47 

4 

•49 

•51 

•54 

•56 

•59 

•49 

•52 

•54 

•57 

•59 

5 

0.61 

0.64 

0.66 

0.69 

0.71 

0.62 

0.64 

0.67 

0.69 

0.71 

6 

•73 

.76 

.78 

.81 

•83 

•74 

•76 

•79 

.81 

.84 

7 

.86 

.88 

•9i 

•93 

•95 

.86 

•89 

•9i 

•94 

.96 

8 

.98 

1.  00 

•03 

1.05 

1.08 

•99 

1.  01 

1.03 

.06 

1.08 

9 

1.  10 

1-13 

•  15 

1.17 

1.20 

i.  ii 

1.13 

1.16 

.18 

1.  21 

10 

1.22 

1.25 

.27 

1.30 

1.32 

1.23 

.26 

.28 

•31 

i-33 

ii 

•35 

i-37 

•39 

1.42 

1.44 

1-35 

.38 

.40 

•43 

12 
13 

•47 
•59 

1.49 
1.61 

•52 
.64 

1-54 
1.66 

1.56 
1.69 

It 

.50 

.62 

•53 
•65 

•55 
.67 

1.70 

14 

•7i 

1.74 

1.76 

1.78 

1.81 

1.72 

•75 

•  77 

.80 

1.82 

15 

•83 

1.86 

1.88 

1.91 

1-93 

1-85 

•87 

1.89 

1.92 

1.94 

16 

.96 

1.98 

2.00 

2.03 

2.05 

1.97 

•99 

2.O2 

2.04 

2.07 

17 

2.08 

2.10 

2.13 

2.15 

2.17 

2.09 

2.12 

2.14 

2.16 

2.19 

18 

2.20 

2.22 

2.25 

2.27 

2.30 

2.21 

2.24 

2.26 

2.29 

2.31 

J9 

2.32 

2-34 

2-37 

2-39 

2.42 

2-34 

2.36 

2.38 

2.41 

2.43 

20 

2.44 

2.47 

2-49 

2.52 

2-54 

2.46 

2.48 

2.51 

2.53 

2.56 

21 

2.56 

2-59 

2.61 

2.64 

2.66 

2.58 

2.61 

2.63 

2.65 

2.68 

22 

2.69 

2.71 

2.73 

2.76 

2.78 

2.70 

2.73 

2.75 

2.78 

2.80 

23 

2.81 

2.83 

2.86 

2.88 

2.90 

2.83 

2.85 

2.87 

2.90 

2.92 

24 

2-93 

2-95 

2.98 

3.00 

3-03 

2-95 

2.97 

3-oo 

3.02 

3.05 

25 

3-05 

3-07 

3.10 

3.12 

3-15 

3-07 

3.09 

3-12 

3-14 

3-17 

26 

3-17 

3-20 

3-22 

3-24 

3-27 

3-19 

3.22 

3-24 

3-27 

3-29 

27 

3-29 

3-32 

3-34 

3-37 

3-39 

3-31 

3-34 

3-36 

3-39 

3-41 

28 

3-41 

3-44 

346 

3-49 

3-51 

3-44 

3-46 

3-49 

3.5i 

3-53 

29 

3-54 

3-56 

3-58 

3-61 

3-63 

3.56 

3-58 

3-6i 

3.63 

3-66 

30 

3-66 

3-68 

3-71 

3-73 

3-75 

3-68 

3-71 

3-73 

3-75 

3.78 

3i 

3-78 

3-80 

3.83 

3-85 

3-87 

3-8o 

3.83 

3.85 

3-88 

3-90 

32 

3-90 

3-92 

3-95 

3-97 

4.00 

3.92 

3-95 

3-97 

4.00 

4.02 

33 

4.02 

4.04 

4.07 

4.09 

4.12 

4.05 

4.07 

4.10 

4.12 

4.14 

34 

4.14 

4.17 

4.19 

4.21 

4.24 

4.17 

4.19 

4.22 

4.24 

4.27 

35 

4.26 

4.29 

4.3i 

4-33 

4-36 

4.29 

4-31 

4-34 

4.36 

4-39 

SMITHSONIAN  TABLES. 


TABLE  11, 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT  OP  THE  BAROMETER 

760  mm. 

HEIGHT  OF  THE  BAROMETER 

765  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

O.OO 

O.O2 

0.05 

0.07 

O.IO 

O.OO 

0.03 

0.05 

0.07 

O.IO 

i 

.12 

•15 

.17 

.20 

.22 

.13 

.15 

-17 

.20 

.22 

2 

.25 

.27 

•30 

.32 

.35 

.25 

.27 

-30 

.32 

•35 

3 

•37 

.40 

.42 

•45 

•47 

.37 

.40 

.42 

•45 

•47 

4 

•50 

•52 

•55 

•57 

.60 

.50 

•52 

•55 

•57 

.60 

5 

0.62 

0.65 

0.67 

0.69 

0.72 

0.62 

0.65 

0.67 

0.70 

0.72 

6 

•  74 

•77 

•79 

.82 

.84 

.75 

•77 

.80 

.82 

•85 

7 

.87 

.89 

.92 

.94 

•97 

.87 

.90 

.92 

•95 

•97 

8 

•99 

1.02 

.04 

.07 

.09 

1.  00 

.02 

•05 

.07 

.10 

9 

1.  12 

I.I4 

.17 

•19 

.21 

1.  12 

•15 

.17 

.20 

.22 

10 

1.24 

1.26 

.29 

•3i 

-34 

1-25 

.27 

.30 

.32 

•35 

ii 

1.36 

L39 

.41 

•44 

.46 

i-37 

.40 

.42 

•45 

•47 

12 

1.49 

I-5I 

•54 

.56 

•59 

1.50 

.52 

•55 

•57 

.60 

13 

1.61 

1.64 

.66 

.68 

1.71 

1.62 

.65 

.67 

.70 

1.72 

14 

1-73 

I.76 

.78 

.81 

1.83 

1.75 

•77 

.80 

.82 

1.85 

15 

1.86 

1.88 

1.91 

i-93 

1.96 

1.87 

1.89 

1.92 

1.94 

1.97 

16 

1.98 

2.01 

2.03 

2.06 

2.08 

1.99 

2.02 

2.04 

2.07 

2.09 

17 

2.10 

2.13 

2.15 

2.18 

2.20 

2.12 

2.14 

2.17 

2.19 

2.22 

18 

2.23 

2.25 

2.28 

2.30 

2-33 

2.24 

2.27 

2.29 

2.32 

2-34 

J9 

2-35 

2.38 

2.40 

2.43 

2-45 

2-37 

2-39 

2.42 

2.44 

2.47 

20 

2.47 

2.50 

2.52 

2.55 

2-57 

2-49 

2.52 

2.54 

2.57 

2-59 

21 

2.60 

2.62 

2.65 

2.67 

2.70 

2.62 

2.64 

2.66 

2.69 

2.71 

22 

2.72 

2-75 

2.77 

2.80 

2.82 

2.74 

2.76 

2.79 

2.81 

2.84 

23 

2.84 

2.87 

2.89 

2.92 

2.94 

2.86 

2.89 

2.91 

2.94 

2.96 

24 

2.97 

2.99 

3.02 

3-04 

3.07 

2.99 

3.01 

3.04 

3.06 

3-09 

25 

3.09 

3.12 

3.14 

3.16 

3-19 

3.11 

3-14 

3.16 

3-19 

3-21 

26 

3.21 

3-24 

3-26 

3.29 

3.31 

3-23 

3-26 

3-28 

3.31 

3-33 

27 

3-34 

3.36 

3-39 

341 

3-43 

3.36 

3.38 

3-41 

3-43 

3.46 

28 
29 

346 
3.58 

3.48 
3.61 

3-51 
3.63 

3-53 
3.66 

3.56 
3.68 

3-48 

3-51 
3.63 

3-53 
3.66 

3-56 
3-68 

3-58 
3-70 

30 

3.71 

3-73 

3.75 

3-78 

3.80 

3-73 

3-75 

3.78 

3-8o 

3.83 

31 

3.83 

3-85 

3-88 

3-90 

3-93 

3.85 

3.88 

3.90 

3-93 

3-95 

32 

3-95 

3.98 

4.00 

4.02 

4-05 

3.98 

4.00 

4-03 

4-05 

4.08 

33 

4.07 

4.10 

4.12 

4.15 

4.17 

4.10 

4.13 

4-15 

4.17 

4.20 

34 

4.20 

4.22 

4.25 

4.27 

4.29 

4.22 

4.25 

4.27 

4-30 

4-32 

35 

4.32 

4-34 

4-37 

4-39 

4-42 

4-35 

4-37 

4.40 

4.42 

4-45 

SMITHSONIAN  TABLES. 


53 


TABLE  11. 
REDUCTION    OF  THE    BAROMETER  TO    STANDARD   TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF   THE   BAROMETER 

770  mm. 

HEIGHT   OF   THE   BAROMETER 

775  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

O.OO 

0.03 

0.05 

O.o8 

0.10 

0.00 

0.03 

0.05 

0.08 

O.IO 

i 

•13 

•15 

.18 

.20 

•23 

•13 

•15 

.18 

.20 

•23 

2 

•25 

.28 

•30 

•33 

•35 

•25 

.28 

•30 

•33 

•35 

3 

•38 

.40 

•43 

•45 

.48 

.38 

.40 

•43 

.46 

.48 

4 

•50 

•53 

•55 

•58 

.60 

•51 

•53 

•56 

•58 

.61 

5 

0.63 

0.65 

0.68 

0.70 

0.73 

0.63 

0.66 

0.68 

0.71 

0.73 

6 

•75 

•78 

.80 

•83 

•85 

.76 

•78 

.81 

•83 

.86 

7 

.88 

.90 

•93 

•95 

.98 

.89 

.91 

•94 

.96 

•99 

8 

1.  01 

1.03 

i.  06 

i.  08 

I.  II 

1.  01 

1.04 

1.06 

1.09 

i.  ii 

9 

I.I3 

1.16 

1.18 

1.  21 

1.23 

1.14 

1.16 

1.19 

1.  21 

1.24 

10 

1.26 

1.28 

•3i 

i-33 

1.36 

1.26 

1.29 

•31 

1-34 

1.36 

ii 

1.38 

1.41 

•43 

1.46 

1.48 

1-39 

1.42 

.44 

1.47 

1.49 

12 

•56 

1.58 

1.61 

1.52 

i.54 

•57 

i-59 

1.62 

13 

l'§ 

i  66 

.68 

1.71 

1-73 

1.64 

1.67 

.69 

1.72 

1-74 

14 

1.76 

1.78 

.81 

1.83 

1.86 

1.77 

1-79 

.82 

1.84 

1.87 

15 

.1.88 

1.91 

i-93 

1.96 

1.98 

1.89 

1.92 

1.94 

1.97 

2.00 

16 

2.OI 

2.03 

2.06 

2.08 

2.II 

2.02 

2.05 

2.07 

2.10 

2.12 

17 

2.13 

2.16 

2.18 

2.21 

2.23 

2.15 

2.17 

2.20 

2.22 

2.25 

18 

2.26 

2.28 

2.31 

2.33 

2.36 

2.27 

2.30 

2.32 

2-35 

2-37 

19 

2.38 

2.41 

2-43 

2.46 

2.48 

2.40 

2.42 

2-45 

2-47 

2.50 

20 

2.51 

2-53 

2.56 

2.58 

2.61 

2.52 

2.55 

2.57 

2.60 

2.62 

21 

2.63 

2.66 

2.68 

2.71 

2.73 

2.65 

2.67 

2.70 

2.72 

2-75 

22 

2.76 

2.78 

2.81 

2.83 

2.86 

2.77 

2.80 

2.83 

2.85 

2.88 

23 

2.88 

2.91 

2-93 

2.96 

2.98 

2.90 

2.93 

2.95 

2.98 

3.00 

24 

3-oi 

3-03 

3.08 

3-11 

3.03 

3-05 

3-08 

3.10 

3-13 

25 

3-13 

3-i6 

3.18 

3-21 

3-23 

3-15 

3.18 

3.20 

3.23 

3-25 

26 

3-26 

3-28 

3.31 

3-33 

3.36 

3.28 

3-30 

3-33 

3-35 

3.38 

27 

3.38 

3-43 

3.46 

3-48 

3-40 

343 

3-45 

3-48 

3-50 

28 

3-51 

3-53 

3-56 

3-58 

3.6o 

3-53 

3-55 

3.58 

3.60 

3-63 

29 

3.63 

3-65 

3-68 

3-70 

3-73 

3-65 

3-68 

3-70 

3-73 

3-75 

30 

3-75 

3-7*8 

3-80 

3.83 

3-85 

3.78 

3.80 

3-83 

3.85 

3-88 

31 

3-88 

3.90 

3-93 

3-95 

3.98 

3-90 

3-93 

3-95 

3.98 

4.00 

32 

4.00 

4.03 

4.05 

4.08 

4.10 

4-03 

4-05 

4.08 

4.10 

4-13 

33 
34 

4.13 
4.25 

4.28 

4.18 
4.30 

4.20 

4-33 

4-23 
4-35 

4.15 
4.28 

4.18 
4-30 

4.20 
4-33 

4-23 
4-35 

4.25 
4.38 

35 

4.38 

4.40 

4-43 

4-45 

4.48 

4.40 

4-43 

4-45 

4.48 

4-50 

SMITHSONIAN  TABLES. 


54 


TABLE  11 

REDUCTION    OF  THE    BAROMETER  TO    STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


H 

EIGHT  O 

7 

F  THE  B 

80  mrr 

AROMET] 
1. 

KB 

H. 

EIGHT  O 

7 

B1  THE  B 

85  mn 

AROMETI 
1. 

• 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

o.oo 

0.03 

0.05 

0.08 

O.IO 

O.OO 

0.03 

0.05 

0.08 

O.IO 

i 

•  13 

•15 

.18 

.20 

•23 

•13 

•15 

.18 

.21 

•23 

2 

3 

•25 

.38 

.28 
.41 

•31 

3 

•36 

.48 

.26 

•38 

.28 
.41 

•31 

•44 

•33 
.46 

•36 
.49 

4 

.51 

•53 

•56 

•59 

.61 

•51 

•54 

.56 

•59 

.62 

5 

0.64 

0.66 

0.69 

0.71 

0-74 

0.64 

0.67 

0.69 

0.72 

o.74 

6 

.76 

•79 

.81 

.84 

.87 

•77 

•79 

.82 

•85 

•87 

7 

.89 

•92 

•94 

•97 

•99 

.90 

.92 

•95 

•97 

1.  00 

8 

.02 

1.04 

1.07 

1.09 

.12 

1.02 

•05 

.08 

1.  10 

1.13 

9 

.15 

1.17 

1.20 

1.22 

•25 

I.I5 

.18 

.20 

1.23 

1.25 

10 

ii 

•27 
.40 

1.30 

1.42 

1.32 

Ii 

•37 
•50 

1.28 

I.4I 

•43 

3 

1.36 

1.48 

1.38 

1.51 

12 

•53 

1-55 

1.58 

'.60 

•63 

•56 

•59 

1.61 

1.64 

13 

.65 

1.68 

1.70 

•73 

•  75 

1.66 

.69 

•71 

1.74 

1.77 

14 

1.78 

1.81 

1.83 

.86 

.88 

1-79 

.82 

.84 

1.87 

1.89 

15 

1.91 

1-93 

I.96 

1.98 

2.01 

1.92 

1.94 

1.97 

2.00 

2.02 

16 

2.03 

2.06 

2.08 

2.II 

2.13 

2.05 

2.07 

2.10 

2.12 

2.15 

17 

2.16 

2.19 

2.21 

2.24 

2.26 

2.17 

2.20 

2.22 

2.25 

2.28 

18 

2.29 

2.31 

2-34 

2.36 

2.39 

2.30 

2-33 

2-35 

2.38 

2.40 

19 

2.41 

2.44 

2.46 

2-49 

2.51 

2.43 

2-45 

2.48 

2.51 

2-53 

20 

21 

2.54 
2.67 

2-57 
2.69 

2-59 
2.72 

2.62 

2.74 

2.64 

2.77 

2.56 
2.68 

2.58 
2.71 

2.61 

2.73 

ft 

2.66 
2-79 

22 

2.79 

2.82 

2.84 

2.87 

2.89 

2.81 

2.86 

2.89 

2.91 

23 

2.92 

2.94 

2.97 

3.00 

3.02 

2-94 

2.96 

2.99 

3.01 

3-04 

24 

3.05 

3-07 

3-10 

3-12 

3-15 

3-07 

3-09 

3-12 

3-14 

3-17 

25 

3-17 

3-20 

3-22 

3.25 

3-27 

3-19 

3-22 

3-24 

3-27 

3-29 

26 

3-30 

3-32 

3-35 

3-37 

3-40 

3-32 

3-34 

3-37 

3-40 

3-42 

27 

3-42 

3-45 

3-47 

3-50 

3-53 

3-45 

3-47 

3-50 

3-52 

3-55 

28 

3-55 

3-58 

3-60 

3.63 

3-65 

3-57 

3-6o 

3-62 

3-65 

3-67 

29 

3.68 

3-70 

3-73 

3-75 

3-78 

3-70 

3-73 

3-75 

3-78 

3-80 

30 

3-93 

3.83 

3.85 
3.98 

3-88 
4.00 

3-9° 
4-03 

3.83 
3-95 

3*98 

3-88 
4.00 

3-90 

4-03 

3-93 
4.06 

32 

4-05 

4.08 

4.11 

4-13 

4.16 

4.08 

4.  ii 

4-13 

4.16 

4.18 

33 

4.18 

4.21 

4.23 

4.26 

4.28 

4.21 

4.23 

4.26 

4.28 

4-31 

34 

4.31 

4-33 

4.36 

4.38 

4.41 

4-33 

4.36 

4-39 

4.41 

4-44 

35 

4-43 

4.46 

448 

4-51 

4-53 

4.46 

4.49 

4-51 

4-54 

4.56 

SMITHSONIAN  TABLES. 


55 


TABLE  11. 
REDUCTION   OF  THE   BAROMETER    TO    STANDARD    TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT  OF  THE  BAROMETER 

790  mm. 

HEIGHT  OF  THE  BAROMETER 

795  mm. 

Attached 
Ther- 
mometer 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

0.00 

0.03 

0.05 

0.08 

0.10 

0.00 

0.03 

0.05 

O.o8 

0.10 

I 

•13 

•15 

.18 

.21 

•23 

•13 

.16 

.18 

.21 

•23 

2 

.26 

.28 

•31 

•34 

•36 

.26 

.29 

•31 

•34 

•36 

3 

•39 

.41 

•44 

.46 

.49 

•39 

.42 

•44 

•47 

•49 

4 

•52 

•54 

•57 

•59 

.62 

•52 

•55 

•57 

.60 

.62 

5 

0.64 

0.67 

0.70 

0.72 

0.75 

0.65 

0.67 

0.70 

0.73 

o.75 

6 

7 

•77 
.90 

.80 

•83 
•95 

:98i 

.88 

1.  01 

•78 
•91 

.80 
•93 

•'96 

•99 

.88 

1.  01 

8 

1.03 

i.  06 

1.08 

i.  ii 

I-I3 

1.04 

1.06 

1.09 

1.  12 

1.14 

9 

1.16 

1.19 

1.  21 

1.24 

1.26 

I.I7 

1.19 

1.22 

1.24 

1.27 

10 

1.29 

•31 

1-34 

•37 

1-39 

1-30 

1.32 

1.35 

i-37 

1.40 

ii 

1.42 

•44 

1.47 

•49 

1.52 

1-43 

i-45 

1.48 

1.50 

1.53 

12 

1-55 

•57 

1.60 

.62 

1-65 

1.56 

1.58 

1.61 

1-63 

1.66 

13 

1.67 

.70 

1-73 

•75 

1.78 

1.68 

1.71 

1.74 

1.76 

1.79 

14 

I.8o 

1.83 

1.85 

.88 

1.91 

1.81 

1.84 

1.87 

1.89 

1.92 

15 

1-93 

1.96 

1.98 

2.01 

2.03 

1.94 

1.97 

1.99 

2.O2 

2.05 

16 

2.06 

2.09 

2.II 

2.14 

2.16 

2.07 

2.10 

2.12 

2.15 

2.18 

17 
18 

2.19 
2.32 

2.21 
2-34 

2.24 
2.37 

2.26 
2-39 

2.29 
2.42 

2.20 
2-33 

d 

2.25 
2.38 

2.28 
2.41 

2.30 
2-43 

19 

2-44 

2.47 

2.50 

2.52 

2.55 

2.46 

2.49 

2.51 

2.54 

2.56 

20 

2.57 

2.6O 

2.62 

2.65 

2.67 

2.59 

2.61 

2.64 

2.67 

2.69 

21 

2.70 

2.73 

2-75 

2.78 

2.80 

2.72 

2.74 

2.77 

2.79 

2.82 

22 
23 

2.83 
2.96 

2.85 
2.98 

2.88 
3-01 

2.91 
3-03 

2-93 
3-o6 

2.85 
2.98 

2.87 

3.00 

2.90 
3-03 

2.92 
3-05 

2-95 
3-o8 

24 

3-o8 

3-1* 

3-14 

3-i6 

3.19 

3.10 

3-13 

3.16 

3-18 

3.21 

25 

3-21 

3-24 

3-26 

3-29 

3-31 

3-23 

3.26 

3-28 

3-31 

3-34 

26 

3-34 

3-37 

3-39 

3-42 

3-44 

3-39 

3-41 

3-44 

3-46 

27 

3-47 

3-49 

3-52 

3-54 

3-57 

3-49 

3-52 

3-54 

3-57 

3-59 

28 

3-6o 

3.62 

3-65 

3-67 

3-70 

3-62 

3-64 

3-67 

3-70 

3-72 

29 

3-72 

3-75 

3-77 

3-8o 

3.83 

3-75 

3-77 

3-8o 

3-82 

3-85 

30 

3.85 

3-88 

3-90 

3-93 

3-95 

3-88 

3-90 

3-93 

3-95 

3-98 

31 

3-98 

4.00 

4-03 

4.06 

4.08 

4.00 

4-03 

4.06 

4.08 

4.11 

32 

4.11 

4-13 

4.16 

4.18 

4.21 

4-13 

4.16 

4.18 

4.21 

4.24 

33 
34 

4-23 
4-36 

4.26 
4-39 

4.29 
4.41 

4-31 
4.44 

4-34 
4.46 

4.26 
4-39 

4.29 
4-42 

4-31 
4-44 

4-34 
4-47 

4-36 
4-49 

35 

4-49 

4-51 

4-54 

4-57 

4-59 

4-52 

4-54 

4-57 

4-59 

4.62 

SMITHSONIAN  TABLES. 


TABLE  12. 

REDUCTION    OF   THE    BAROMETER    TO    STANDARD    GRAVITY. 

ENGLISH    MEASURES. 
Reduction  to  Latitude  45°. 

From  latitude  o°  to  45°,  the  correction  is  to  be  subtracted. 
From  latitude  90°  to  45°,  the  correction  is  to  be  added. 


Latitude. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

19 

20 

21 

22 

23 

24 

25 

26 

27 

28 

29 

30 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

0° 

90° 

0.051 

0-053 

0.056 

0.059 

O.o6  1 

0.064 

0.067 

0.069 

0.072 

0.074 

0.077 

0.080 

5 

85 

0.050 

0.052 

0.055 

0.058 

0.060 

0.063 

0.066 

0.068 

0.071 

0.073 

0.076 

0.079 

6 

84 

.049 

.052 

•055 

•057 

.060 

.062 

.065 

.068 

.070 

•073 

.076 

.078 

7 

83 

.049 

•  052 

•054 

•057 

-059 

.062 

.065 

.067 

.070 

.072 

.075 

.077 

8 

82 

.040 

.051 

•054 

.056 

•059 

.061 

.064 

.067 

.069 

.072 

.074 

.077 

9 

81 

.048 

.051 

•053 

.056 

.058 

.061 

.063 

.066 

.068 

.071 

•073 

.076 

10 

80 

0.048 

0.050 

0-053 

0.055 

0.058 

O.o6o 

0.063 

0.065 

0.068 

0.070 

0.073 

0.075 

ii 

79 

.047 

.049 

.052 

•054 

•057 

•059 

.062 

.064 

.067 

.069 

.072 

.074 

12 

78 

.046 

.049 

.051 

.054 

.056 

.058 

.061 

.063 

.066 

.068 

.071 

•073 

13 

77 

•045 

.048 

.050 

•053 

•055 

•057 

.060 

.062 

.065 

.067 

.069 

.072 

14 

76 

•045 

.047 

.049 

.052 

•054 

.056 

•059 

.061 

.063 

.066 

.068 

.071 

15 

75 

0.044 

0.046 

0.048 

0.051 

0.053 

0-055 

0.058 

O.o6o 

0.062 

0.065 

0.067 

0.069 

16 

74 

•043 

•045 

.047 

.050 

.052 

•054 

.056 

•059 

.061 

.063 

.065 

.068 

17 

73 

.042 

.044 

.046 

.049 

.051 

•053 

•055 

•057 

.060 

.062 

.064 

.066 

18 

72 

.041 

•043 

•045 

.047 

.050 

.052 

•054 

.056 

.058 

.060 

.062 

.065 

19 

7i 

.040 

.042 

.044 

.046 

.048 

.050 

.052 

•055 

•057 

•059 

.061 

.063 

20 

70 

0.039 

0.041 

0.043 

0.045 

0.047 

0.049 

0.051 

0.053 

0.055 

0.057 

0.059 

0.06  1 

21 

69 

.038 

.040 

.042 

.044 

•045 

.047 

.049 

.051 

•053 

•055 

•057 

•059 

22 

68 

.036 

.038 

.040 

.042 

.044 

.046 

.048 

.050 

.052 

•054 

.056 

•057 

23 

67- 

•035 

•037 

•039 

.041 

•043 

.044 

.046 

.048 

.050 

.052-, 

•054 

•055* 

24 

66 

•034 

.036 

•037 

•039 

.041 

•043 

•045 

.046 

.048 

.050 

.052 

•053 

25 

65 

0.033 

0.034 

0.036 

0.038 

0.039 

0.041 

0.043 

0.044 

0.046 

0.048 

0.050 

0.051 

26 

64 

.031 

•033 

•034 

.036 

.038 

•039 

.041 

•043 

.044 

.046 

.048 

.049 

27 

63 

.030 

.031 

•033 

•034 

.036 

.038 

.039 

.041 

.042 

.044 

•045 

.047 

28 

62 

.028 

.030 

.031 

•033 

•034 

.036 

•037 

•039 

.040 

.042 

•043 

•045 

29 

61 

.027 

.028 

.030 

.031 

.032 

•034 

•035 

•037 

.038 

•039 

.041 

.042 

30 

60 

0.025 

0.027 

0.028 

0.029 

0.031 

0.032 

0.033 

0.035 

0.036 

0.037 

0.039 

0.040 

3i 

59 

.024 

.025 

.026 

.027 

.029 

.030 

.031 

.032 

•034 

.035 

.036 

.037 

32 

58 

.022 

.023 

.025 

.026 

.027 

.028 

.029 

.030 

.032 

•033 

•034 

•035 

33 

57 

.021 

.022 

.023 

.024 

•025 

.026 

.027 

.028 

.029 

.030 

.031 

.032 

34 

56 

.019 

.020 

.021 

.022 

.023 

.024 

.025 

.026 

.027 

.028 

.029 

.030 

35 

55 

0.017 

0.018 

0.019 

0.020 

0.021 

0.022 

0.023 

0.024 

0.025 

0.025 

0.026 

0.027 

36 

54 

.016 

.Ol6 

.017 

.018 

.019 

.020 

.021 

.O2I 

.022 

.023 

.024 

.025 

37 

53 

.014 

.015 

.015 

.016 

.017 

.018 

.018 

.019 

.020 

.021 

.O2I 

.022 

38 

52 

.012 

.013 

.014 

.OI4 

.015 

•015 

.Ol6 

.017 

.017 

.018 

.019 

.019 

39 

5i 

.Oil 

.Oil 

.012 

.OI2 

.013 

.013 

.014 

.014 

•  015 

.015 

.016 

.017 

40 

50 

0.009 

0.009 

0.010 

0.010 

O.OII 

O.OII 

0.012 

0.012 

0.012 

0.013 

0.013 

0.014 

4i 

49 

.007 

.007 

.008 

.008 

.009 

.009 

.009 

.OIO 

.OIO 

.OIO 

.Oil 

.Oil 

42 

48 

.005 

.006 

.006 

.006 

.006 

.007 

.007 

.007 

.008 

.008 

.008 

.008 

43 

47 

.OO4 

.OO4 

.OO4 

.004 

.004 

.004 

.005 

.005 

.005 

.005 

.005 

.006 

44 

46 

.002 

.002 

.002 

.OO2 

.002 

.002 

.OO2 

.002 

.003 

.003 

.003 

.003 

45 

45 

0.000 

O.OOO 

O.OOO 

0.000 

0.000 

O.OOO 

0.000 

0.000 

O.OOO 

0.000 

0.000 

0.000 

SMITHSONIAN  TABLES. 


TABLE  13. 
REDUCTION    OF  THE    BAROMETER    TO    STANDARD    GRAVITY. 

METRIC    MEASURES. 
Reduction  to  Latitude  45°. 

From  latitude  o°  to  45°,  the  correction  is  to  be  subtracted. 
From  latitude  90°  to  45°,  the  correction  is  to  be  added. 


Latitude. 

HEIGHT  OE  THE  BAROMETER  IN  MIUJMETRES. 

520 

540 

560 

580 

600 

620 

640 

660 

680 

700 

720 

740 

760 

780 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

90° 

1.38 

1.44 

1.49 

i-54 

1.  60 

1.65 

1.70 

I.76 

1.81 

1.86 

1.92 

1.97 

2.  02 

2.08 

5 

85 

1.36 

.42 

1.47 

1.52 

1-57 

1-63 

1.68 

1-73 

1.78 

1.84 

1.89 

1.94 

1.99 

2.04 

6 

84 

i-35 

.41 

1.46 

1.51 

1.56 

1.61 

1.67 

1.72 

1.77 

1.82 

1.87 

J-93 

I  98 

2.03 

7 

83 

i-34 

•39 

1-45 

1.50 

i-55 

i.  60 

1.65 

1.70 

1.76 

1.81 

1.86 

1.91 

I.96 

2.01 

8 

82 

i-33 

•38 

1-43 

1.48 

1-54 

i-59 

1.64 

1.69 

1.74 

1.79 

1.84 

1.89 

1.94 

2.00 

9 

81 

1.32 

•37 

1.42 

1.47 

1.52 

i-57 

1.62 

1.67 

1.72 

1.77 

1.82 

1.87 

1.92 

1.97 

10 

80 

1.30 

•35 

1.40 

1-45 

1.50 

i-55 

1.60 

1.65 

1.70 

i-75 

1.80 

1.85 

1.90 

!-95 

ii 

79 

1.28 

•33 

1.38 

i-43 

1.48 

I-53 

1.58 

1.63 

1.68 

i-73 

1.78 

1.83 

1.88 

x-93 

12 

78 

1.26 

•3i 

1.36 

1.41 

1.46 

i-5i 

1.56 

1.60 

1.65 

1.70 

i-75 

i.So 

1.85 

1.90 

13 

77 

1.24 

.29 

i-34 

1-39 

1.44 

1.48 

i-53 

1.58 

1.63 

1.67 

1.72 

1.77 

1.82 

1.87 

14 

76 

1.22 

.27 

1.32 

1.36 

1.41 

1.46 

1.50 

i-55 

1.60 

1.65 

1.69 

1.74 

1.79 

1.83 

15 

75 

1.  2O 

.24 

1.29 

•34 

1.38 

i-43 

1.48 

1.52 

1-57 

1.61 

1.66 

r.7i 

1-75 

1.80 

16 

74 

I.I7 

.22 

1.26 

•3i 

i-35 

1.40 

1.44 

1.49 

i-54 

1.58 

1.63 

1.67 

1.72 

1.76 

17 

73 

I-I5 

.19 

1.24 

.28 

1.32 

i-37 

1.41 

i-45 

1.50 

i-54 

1-59 

1.63 

1.68 

1.72 

18 

72 

1.  12 

.16 

1.  21 

•25 

1.29 

i-34 

1.38 

1.42 

1.46 

1.51 

i-55 

!-59 

1.64 

1.68 

19 

7i 

1.09 

•13 

I.I7 

.22 

1.26 

1.30 

1-34 

1.38 

i-43 

1.47 

1.51 

i-55 

i-59 

1.64 

20 

70 

1.  06 

.IO 

I.I4 

.18 

1.22 

1.26 

i-3i 

i-35 

i-39 

i-43 

1.47 

1-51 

i-55 

i-59 

21 

69 

1.03 

.07 

I.  II 

•15 

I.I9 

1.23 

1.27 

r-3i 

!-35 

1.38 

1.42 

1.46 

1.50 

!-54 

22 

68 

1.  00 

•03 

1.07 

.11 

I-I5 

1.19 

1.23 

1.26 

1.30 

i-34 

1.38 

1.42 

1.46 

1.49 

23 

67 

0.96 

.00 

1.04 

.07 

I.  II 

1-15 

1.18 

1.22 

1.26 

1.29 

i-33 

i-37 

1.41 

1.44 

24 

66 

•93 

0.96 

1.  00 

•03 

1.07 

1.  10 

1.14 

I.lS 

1.  21 

1.25 

1.28 

1.32 

1-35 

i-39 

25 

65 

0.89 

0.92 

0.96 

0.99 

1.03 

1.06 

1.  10 

I-I3 

1.16 

1.20 

1.23 

1.27 

1.30 

!-33 

26 

64 

•85 

.88 

•92 

•95 

0.98 

i.  02 

1.05 

1.  08 

i.  ii 

I.I5 

1.18 

1.  21 

1.25 

1.28 

27 
28 

63 
62 

.81 

•  77 

.84 
.80 

.88 
•83 

& 

•94 
.89 

0.97 
.92 

1.  00 

0.95 

1.03 
0.98 

1.06 

1.  01 

1.  10 

1.04 

k!3 

1.07 

1.16 

1.  10 

1.19 
I-I3 

1.22 

1.16 

29 

61 

•73 

.76 

•79 

.82 

•85 

.87 

.90 

•93 

0.96 

0.99 

1.02 

1.04 

1.07 

1.  10 

30 

60 

0.69 

0.72 

o.75 

0.77 

0.80 

0.83 

0.85 

0.88 

0.91 

0.94 

0.96 

0.98 

1.  01 

1.04 

3i 

CQ 

•65 

.67 

.70 

•72 

•75 

•77 

.80 

.82 

•85 

.87 

.90 

•92 

0-95 

0.97 

32 

58 

.61 

•63 

•65 

.68 

.70 

•  72 

•75 

•  77 

•79 

.82 

.84 

.86 

.89 

.91 

33 

57 

•56 

•58 

.6! 

•63 

•65 

.67 

.69 

•7i 

•  74 

.76 

.78 

.80 

.82 

.84 

34 

56 

•52 

•54 

•56 

•58 

.60 

.62 

.64 

.66 

.68 

.70 

•72 

•74 

.76 

.78 

35 

55 

0.47 

0.49 

0.51 

0-53 

o.55 

0.56 

0.58 

0.60 

0.62 

0.64 

0.66 

0.67 

0.69 

0.71 

36 

54 

•43 

•44 

.46 

.48 

.49 

•5i 

•53 

•54 

•56 

.58 

•59 

.61 

•63 

.64 

37 

53 

•38 

.40 

.41 

•43 

•44 

•45 

•47 

.48 

•50 

•51 

•53 

•54 

•56 

•57 

38 

52 

•33 

•35 

•36 

•37 

•39 

.40 

.41 

•43 

.44 

•45 

.46 

.48 

•49 

•50 

39 

51 

.29 

•30 

•3i 

•32 

•33 

•34 

•35 

•37 

•38 

•39 

.40 

.41 

.42 

•43 

40 

50 

0.24 

0.25 

0.26 

0.27 

0.28 

0.29 

0.30 

0.31 

0.31 

0.32 

0-33 

0-34 

0-35 

0.36 

41 

49 

.19 

.20 

.21 

.21 

.22 

•23 

.24 

.24 

•25 

.26 

•27 

.27 

.28 

.29 

42 

48 

.14 

•15 

.16 

.16 

•17 

•  17 

.18 

.18 

.19 

•19 

.20 

.21 

.21 

.22 

43 

47 

.10 

.10 

.10 

.11 

.11 

.12 

.12 

.12 

•J3 

•13 

•  13 

.14 

.14 

.14 

44 

46 

•05 

•05 

•05 

•05 

.06 

.06 

.06 

.06 

.06 

.07 

.07 

.07 

.07 

.07 

45 

45 

0.00 

o.oo 

0.00 

O.OO 

O.OO 

O.OO 

O.OO 

0.00 

0.00 

O.OO 

O.OO 

0.00 

O.OO 

0.00 

SMITHSONIAN  TABLES. 


59 


TABLE  14. 

REDUCTION    OF  THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 
Values  of  2000  X  m. 


56573+I23.I0+.003Z 


Mean  Tem- 
perature 
of  air 
column. 
0  Fahr. 

ALTITUDE  OP  STATION  IN  FEET  (z). 

Differ- 
ence 
for 
100 
Feet. 

100 

200 

300 

400 

500 

600 

700 

800 

900 

1000 

-20° 

3-7 

7.4 

n.  i 

14.8 

18.5 

22.2 

25-9 

29.6 

33-3 

37.o 

3.7 

-16 

3-7 

7-3 

II.O 

14.6 

18.3 

22.0 

25.6 

29-3 

33-0 

36.6 

3-7 

—  12 

3-6 

7-3 

10.9 

14.5 

18.1 

21.8 

25-4 

29.0 

32.7 

36.3 

3-6 

-  8 

3-6 

7-2 

10.8 

14.4 

18.0 

21.6 

25.2 

28.8 

32.4 

36.0 

3.6 

-   6 

3-6 

7.2 

10.7 

14.3 

17.9 

21.5 

25.1 

28.6 

32.2 

35.8 

3-6 

-  4 

3-6 

7.1 

10.7 

14-3 

17.8 

21.4 

25.0 

28.5 

32.1 

35-6 

3.6 

—     2 

3-5 

7-1 

10.7 

14.2 

17.7 

21.3 

24.8 

28.4 

3L9 

354 

3-5 

0 

3-5 

7.1 

10.6 

14.1 

17.7 

21.2 

24.7 

28.3 

31-8 

35-3 

3-5 

+    2 

3-5 

7.o 

10.6 

14.1 

17.6 

21.  1 

24.6 

28.1 

3L7 

35-2 

3-5 

4 

3-5 

7.o 

10.5 

14.0 

17-5 

21.0 

24-5 

28.0 

31-5 

35.o 

3-5 

6 

3-5 

7.o 

10.5 

13-9 

17.4 

20.9 

24.4 

27-9 

31-4 

34-9 

3-5 

8 

3-5 

6.9 

10.4 

13.9 

17.4 

20.8 

24-3 

27.8 

31-2 

34-7 

3-5 

10 

3-5 

6-9 

10.4 

13-8 

17-3 

20.7 

24.2 

27.7 

31-1 

34-6 

3.5 

12 

3-4 

6-9 

10.3 

13-8 

17.2 

20.6 

24.1 

27.5 

31.0 

34-4 

34 

14 

3-4 

6-9 

10.3 

13-7 

17.1 

20.6 

24.0 

27.4 

30.8 

34-3 

3-4 

16 

3-4 

6.8 

10.2 

13-6 

17.1 

20.5 

23-9 

27-3 

30.7 

34-1 

3-4 

18 

34 

6.8 

10.2 

13.6 

17.0 

20.4 

23-8 

27.2 

30.6 

34-0 

3-4 

20 

3-4 

6.8 

10.  1 

13-5 

16.9 

20.3 

23.7 

27.1 

30.4 

33.8 

3-4 

22 

3-4 

6.7 

10.  1 

13-5 

16.8 

20.  2 

23.6 

26.9 

30.3 

33-7 

34 

24 

3-4 

6.7 

10.  1 

134 

16.8 

20.1 

23-5 

26.8 

30.2 

33-5 

3-4 

26 

3-3 

6.7 

10.  0 

134 

16.7 

20.0 

23-4 

26.7 

30.1 

33-4 

3-3 

28 

3-3 

6.7 

10.0 

13.3 

16.6 

20.0 

23-3 

26.6 

29.9 

33-3 

3.3 

30 

3-3 

6.6 

9-9 

13.2 

16.6 

19.9 

23.2 

26.5 

29.8 

33-  I 

3-3 

32 

3-3 

6.6 

9-9 

13.2 

16.5 

19.8 

23.1 

26.4 

29.7 

33-0 

3-3 

34 

3-3 

6.6 

99 

16.4 

19.7 

23.0 

26.3 

29.6 

32.8 

3-3 

36 

3-3 

6.5 

9.8 

13.1 

16.4 

19.6 

22.9 

26.2 

29.4 

32-7 

3.3 

38 

3-3 

6.5 

9.8 

13.0 

16.3 

19-5 

22.8 

26.0 

29.3 

32.6 

3-3 

40 

3-2 

6.5 

9-7 

13.0 

16.2 

19.5 

22.7 

25-9 

29.2 

32.4 

3-2 

42 

3.2 

6.5 

9-7 

12.9 

16.1 

194 

22.6 

25.8 

29.1 

32.3 

3-2 

.  8 

3.2 
3-2 

6.4 
6.4 

9-6 
9.6 

12.9 

12.8 

16.1 
16.0 

19-3 
19.2 

22.5 
22.4 

25-7 
25.6 

28.9 
28.8 

32.1 
32.0 

3-2 
3-2 

48 

3-2 

6.4 

9.6 

12.7 

15-9 

I9.I 

22.3 

25.5 

28.7 

31.9 

3-2 

50 

3.2 

6-3 

9-5 

12.7 

15.9 

19.0 

22.2 

25-4 

28.6 

31.7 

3.2 

52 

3.2 

6-3 

9.5 

12.6 

15-8 

19.0 

22.1 

25-3 

28.4 

31-6 

3-2 

54 

3. 

6.3 

9-4 

12.6 

15-7 

18.9 

22.0 

25-2 

28.3 

3L5 

3.1 

56 

3- 

6-3 

9-4 

12.5 

15.7 

18.8 

21.9 

25.1 

28.2 

31-3 

3-1 

58 

3- 

6.2 

9-4 

12.5 

15.6 

18.7 

21.8 

25.0 

28.1 

31.2 

3-1 

60 

3. 

6.2 

9-3 

12.4 

15-5 

18.6 

21.7 

24.8 

28.0 

31.1 

3-1 

62 

3- 

6.2 

9-3 

12.4 

15.5 

18.6 

21.6 

24.7 

27.8 

30.9 

3.1 

64 

3- 

6.2 

9.2 

12.3 

15.4 

18.5 

21.6 

24.6 

27.7 

30.8 

3.1 

66 

3- 

6.1 

9.2 

12.3 

15.3 

18.4 

21-5 

24-5 

27.6 

30.7 

3.1 

68 

6.1 

9-2 

12.2 

15.3 

18.3 

21.4 

24.4 

27.5 

30.5 

3-1 

70 

3.0 

6.1 

9-1 

12.2 

15-2 

18.2 

21.3 

24-3 

27.4 

30.4 

3.0 

72 

6.1 

9.1 

I2.I 

15-1 

18.2 

21.2 

24.2 

27.3 

30.3 

3-0 

76 

3'° 

6.0 

9-° 

12.0 

15.0 

18.0 

21.0 

24.0 

27.0 

30.0 

3-o 

80 

3-0 

6.0 

8.9 

II.9 

14.9 

17.9 

20.9 

23.8 

26.8 

29.8 

3-° 

84 

3-° 

5-9 

8.9 

II.8 

14.8 

17.7 

20.7 

23.6 

26.6 

29.6 

3.0 

88 

2.9 

5-9 

8.8 

II.7 

14.7 

17.6 

20.5 

23.5 

26.4 

29.3 

2.9 

92 

2-9 

5-8 

8.7 

n.6 

14-5 

17.4 

20.4 

23-3 

26.2 

29.1 

2.9 

96 

2.9 

5.8 

8.7 

11.5 

14.4 

17.3 

20.2 

23.1 

26.0 

28.9 

2.9 

SMITHSONIAN  TABLES. 


60 


TABLE    14. 
REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 

Z    i-0) 


Values  of  2000  X  m. 


56573+I23.I0+.003Z 


Mean  Tem- 
perature 
of  air 
column. 
0Fahr. 

AI/MTUDF,  OF  STATION  IN  FEET  (z). 

Differ- 
ence 
for 
100 
Feet. 

1100 

1200 

1300 

1400 

1500 

1600 

1700 

1800 

1900 

2000 

-20° 

40.7 

44-3 

48.0 

51-7 

55-4 

59-i 

62.8 

66.5 

70.2 

73-9 

3-7 

-16 

40.3 

43-9 

47.6 

51-3 

54.9 

58.6 

62.2 

65.9 

69.6 

73-2 

3.7 

—  12 

39-9 

43-5 

47.2 

50.8 

54-4 

58.1 

61.7 

65.3 

68.9 

72.6 

3-6 

-  8 

39-6 

43-2 

46.7 

50.3 

53-9 

57-5 

61.1 

64.7 

68.3 

71.9 

3-6 

-   6 

39-4 

43-0 

46.5 

50.1 

53-7 

57-3 

60.9 

64-4 

68.0 

71.6 

3-6 

-   4 

39-2 

42.8 

46.3 

49-9 

53-5 

57-0 

60.6 

64.2 

67.7 

7L3 

3.6 

—     2 

39-o 

42.6 

46.1 

49-7 

53-2 

56.8 

60.3 

63-9 

67.4 

71.0- 

3.6 

0 

38.9 

42.4 

45-9 

49-5 

53-0 

56.5 

60.  i 

63.6 

67.1 

70.6 

3-5 

+     2 

38.7 

42.2 

45.7 

49.2 

52.8 

56.3 

59-8 

63.3 

66.8 

70.3 

3-5 

4 

38.5 

42.0 

45.5 

49.0 

52.5 

56.0 

59.5 

63.0 

66.5 

70.0 

3-5 

6 

38-4 

41.8 

45-3 

48.8 

52.3 

55.8 

59-3 

62.8 

66.2 

69.7 

3-5 

8 

38.2 

41.7 

45-i 

48.6 

52.1 

55.5 

59-0 

62.5 

66.0 

694 

3.5 

10 

38.0 

41-5 

44-9 

48.4 

51-8 

55-3 

58.8 

62.2 

65.7 

69.1 

3-5 

12 

37-9 

41-3 

44-7 

48.2 

51.6 

55-1 

58.5 

61.9 

65.4 

68.8 

3«4 

14 

37-7 

41.1 

44-5 

48.0 

5L4 

54.8 

58.2 

61.7 

65.1 

68.5 

3-4 

16 

37-5 

40.9 

44-4 

47-8 

51-2 

54-6 

58.0 

61.4 

64.8 

68.2 

3-4 

18 

37-4 

40.8 

44.2 

47.6 

51-0 

544 

57-8 

61.1 

64.5 

67.9 

3-4 

20 

37-2 

40.6 

44.0 

47-4 

50.7 

54-1 

57-5 

60.9 

64.3 

67.7 

3-4 

22 

37-1 

40.4 

43-8 

47-2 

50-5 

53-9 

57-3 

60.6 

64.0 

67.4 

34 

24 

36.9 

40-3 

43-6 

47.0 

50.3 

53.7 

57.o 

60.4 

63.7 

67.1 

3.4 

26 

36.7 

40.1 

43-4 

46.8 

50.1 

53-4 

56.8 

60.  i 

63.5 

66.8 

3-3 

28 

36-6 

39-9 

43-2 

46.6 

49-9 

53-2 

56.5 

59-9 

63.2 

66.5 

3.3 

30 

36.4 

39-7 

43-1 

46.4 

49-7 

53-0 

56.3 

59-6 

62.9 

66.2 

3-3 

32 

36.3 

39-  6 

42.9 

46.2 

49-5 

52.8 

56.1 

59-4 

62.7 

66.0 

3-3 

34 

36-1 

39-4 

42.7 

46.0 

49.3 

52.5 

55-8 

59.i 

62.4 

65.7 

3.3 

36 

36.0 

39-2 

42-5 

45-8 

49.0 

52-3 

55-6 

58.9 

62.1 

65.4 

3-3 

33 

35-8 

39-1 

42.3 

45.6 

48.8 

52.1 

55-3 

58.6 

61.9 

65.1 

3-3 

40 

35-7 

38.9 

42.1 

45-4 

48.6 

5L9 

55.1 

58.4 

61.6 

64.8 

3.2 

42 

35-5 

38.7 

42.0 

45-2 

48.4 

5i.6 

54.9 

58.1 

61.3 

64.6 

3-2 

44 

35-4 

38.6 

41.8 

45-0 

48.2 

51-4 

54-6 

57-9 

61.1 

64.3 

3«2 

46 

35-2 

38.4 

41.6 

44-8 

48.0 

51.2 

54-4 

57-6 

60.8 

64.0 

3-2 

48 

35-i 

38.2 

41.4 

44.6 

47-8 

51-0 

54-2 

57-4 

60.5 

63.7 

3-2 

50 

34-9 

38.1 

41.2 

44-4 

47.6 

50.8 

53.9 

57-1 

60.3 

634 

3-2 

52 

34-8 

37-9 

41.1 

44.2 

47-4 

50.5 

53.7 

56.9 

60.0 

63.2 

3-2 

54 

34-6 

37-7 

40.9 

44.0 

47-2 

50.3 

53-5 

56.6 

59-8 

62.9 

3-1 

56 

34-5 

37-6 

40.7 

43-9 

47-0 

50.1 

53.2 

56.4 

59.5 

62.6 

3-1 

58 

34-3 

37-4 

40.5 

43-7 

46.8 

49-9 

53-0 

56.1 

59-3 

62.4 

3.1 

60 

34-2 

37-3 

40.4 

43-5 

46.6 

49-7 

52.8 

55-9 

59-0 

62.1 

3-1 

62 

34-0 

37-i 

40.2 

43-3 

46.4 

49-5 

52.6 

55.7 

58.8 

61.9 

3-i 

64 

33-9 

37-0 

40.6 

43-1 

46.2 

49-3 

52.4 

55-4 

58.5 

61.6 

3-1 

66 

33-7 

36.8 

39-9 

42.9 

46.0 

49.1 

52.1 

55-2 

58.3 

61.3 

3-1 

68 

33-6 

36-6 

39-7 

42.8 

45-8 

48.9 

5L9 

55-0 

58.0 

61.1 

3.1 

70 

33-5 

36.5 

39-5 

42.6 

45.6 

48.7 

51-7 

54.7 

57-8 

60.8 

3.o 

72 

33-3 

36.3 

39-4 

42.4 

45-4 

48.5 

51-5 

54-5 

57-5 

60.6 

3-0 

76 

33-0 

36.0 

39-1 

42.1 

45-1 

48.1 

5i.i 

54-1 

57-1 

60.  i 

3.o 

80 

32.8 

35-8 

38.7 

41.7 

44.7 

47.7 

50.6 

53-6 

56.6 

59-6 

3.o 

84 

32-5 

35.5 

38-4 

41.4 

44-3 

47-3 

50.2 

53.2 

56.2 

59-i 

3-0 

88 

32.2 

35-2 

38.1 

41.0 

44.0 

46.9 

49.8 

52.8 

55-7 

58.6 

2.9 

92 

32.0 

34-9 

37-8 

40.7 

43-6 

46.5 

49-4 

52.3 

55-3 

58.2 

2.9 

96 

31.7 

34-6 

37-5 

40.4 

43-3 

46.2 

49.0 

5i.9 

.  54-8 

57.7 

2.9 

SMITHSONIAN  TABLES. 


61 


TABLE  14. 

REDUCTION    OF  THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 
Values  of  2OOO  X  m.  m  = 


Z    i- 


Mean  Tem- 
perature 
of  air 
column. 
9  Fahr. 

AI/TITUDE)  OF  STATION  IN  FEET   (z). 

Differ- 
ence 
for 
100 
Feet. 

2100 

2200 

2300 

2400 

2500 

2600 

2700 

2800 

2900 

3000 

-20° 

77-6 

81.3 

85.0 

88.7 

92.4 

96.1 

99.8 

103.5 

107.2 

110.9 

3-7 

-16 

76.9 

80.6 

84.2 

87.9 

9*-5 

95.2 

98.9 

102.5 

106.2 

109.8 

3>7 

—  12 

76.2 

79-8 

83.5 

87.1 

90.7 

94.3 

98.0 

101.6 

105.2 

108.8 

3.6 

-  8 

75-5 

79.1 

82.7 

86.3 

89.9 

93-5 

9M 

100.7 

104.3 

107.9 

3.6 

-   6 

75-2 

78.8 

82.3 

85.9 

89-5 

93-1 

96.6 

100.2 

103.8 

107.4 

3.6 

-  4 

74.8 

78.4 

82.0 

85.5 

89.1 

92.7 

96.2 

99.8 

103-3 

106.9 

3.6 

—    2 

74-5 

78.1 

81.6 

85.2 

88.7 

92.2 

95-8 

99-3 

102.9 

106.4 

3-5 

0 

74.2 

77-7 

81.2 

84.8 

88.3 

91.8 

95-4 

98.9 

102.5 

106.0 

3-5 

+     2 

73-9 

77-4 

80.9 

84-4 

87-9 

91.4 

95-0 

98.5 

IO2.O 

105.5 

3-5 

4 

73-5 

77.0 

80.5 

84.0 

87.5 

91.0 

94-5 

98.0 

IOI.5 

105.0 

3-5 

6 

73-2 

76.7 

80.2 

83.7 

87.2 

90.6 

94.1 

97.6 

IOI.I 

104.6 

3-5 

8 

72.9 

76.4 

79-8 

83.3 

86.8 

90.2 

93-7 

97.2 

100.7 

104.1 

3-5 

10 

72.6 

76.0 

79-5 

82.9 

86.4 

89.9 

93-3 

96.8 

IOO.2 

103.7 

3-5 

12 

72-3 

75-7 

79.1 

82.6 

86.0 

89-5 

92.9 

96.3 

99-8 

103.2 

3-4 

14 

72.0 

75-4 

78.8 

82.2 

85.7 

89.1 

92-5 

95-9 

99-4 

102.8 

3-4 

16 

71.6 

75-1 

78.5 

81.9 

85.3 

88.7 

92.1 

95-5 

98.9 

102.3 

3-4 

18 

71-3 

74-7 

78.! 

81.5 

84-9 

88.3 

91.7 

95-1 

98.5 

101.9 

3-4 

20 

71.0 

74-4 

77-8 

81.2 

84.6 

87.9 

9L3 

94-7 

98.1 

101.5 

3-4 

22 

70.7 

74.1 

77-5 

80.8 

84.2 

87.6 

90.9 

94-3 

97.7 

IOI.O 

3-4 

24 

70.4 

73-8 

77.1 

80.5 

83.8 

87.2 

90.6 

93.9 

97-3 

100.6 

3-4 

26 

70.1 

73-5 

76.8 

80.2 

83.5 

86.8 

90.2 

93-5 

96.9 

100.2 

3-3 

28 

69.8 

73-2 

76.5 

79.8 

83.1 

86.5 

89.8 

93-1 

96.4 

99.8 

3.3 

30 

69.5 

72.9 

76.2 

79-5 

82.8 

86.1 

89.4 

92.7 

96.0 

99.3 

3.3 

32 

69.2 

72.5 

75.8 

79.1 

82.4 

85.7 

89.0 

92.3 

95.6 

98.9 

3.3 

34 

69.0 

72.2 

75-5 

78.8 

82.1 

85-4 

88.7 

91^9 

95.2 

98.5 

3-3 

36 

68.7 

71.9 

75-2 

78.5 

81.7 

85.0 

88.3 

9L5 

94.8 

98.1 

3-3 

38 

68.4 

71.6 

74-9 

78.1 

81.4 

84.6 

87.9 

91.2 

94-4 

97.7 

3-3 

40 

68.1 

7L3 

74.6 

77-8 

81.0 

84.3 

87.5 

90.8 

94.0 

97.2 

3-2 

42 

67.8 

71.0 

74-2 

77-5 

80.7 

83.9 

87.1 

90.4 

93-6 

96.8 

3.2 

44 

67.5 

70.7 

73-9 

77.1 

80.3 

83-6 

86.8 

90.0 

93.2 

96.4 

3-2 

46 

67.2 

70.4 

73.6 

76.8 

80.0 

83.2 

86.4 

89.6 

92.8 

96.0 

3.2 

48 

66.9 

70.1 

73-3 

76-5 

79-7 

82.8 

86.0 

89.2 

92.4 

95.6 

3-2 

50 

66.6 

69.8 

73.o 

76.1 

79-3 

82.5 

85.7 

88.8 

92.0 

95-2 

3-2 

52 

66.3 

69-5 

72.7 

75.8 

79.0 

82.1 

85-3 

88.4 

91.6 

94.8 

3.2 

54 

66.1 

72-3 

75-5 

78.6 

81.8 

84.9 

88.1 

91.2 

94-4 

3-i 

56 

65.8 

68  9 

72.0 

75.2 

78-3 

81.4 

84.6 

87.7 

90.8 

94.0 

3-i 

58 

65.5 

68.6 

71.7 

74-9 

78.0 

81.1 

84.2 

87.3 

90.4 

93-6 

3.i 

60 

65.2 

68.3 

7i-4 

74-5 

77-6 

80.7 

83-8 

87.0 

90.1 

93-2 

3-i 

62 

64.9 

68.0 

71.1 

74-2 

77-3 

80.4 

83.5 

86.6 

89.7 

92.8 

3-i 

64 

64.7 

67.8 

70.8 

73-9 

77.0 

80.  i 

83-1 

86.2 

89.3 

92.4 

3.1 

66 

64.4 

67.5 

70.5 

73*6 

76.7 

79-7 

82.8 

85.9 

88.9 

92.0 

3-1 

68 

64.1 

67.2 

70.2 

73-3 

76.3 

79«4 

82.5 

85-5 

88.6 

91.6 

3.i 

70 

63-9 

66.9 

69.9 

73-0 

76.0 

79.1 

82.1 

85-1 

88.2 

91.2 

3.o 

72 

63-6 

66.6 

69.7 

72.7 

75-7 

78.7 

81.8 

84.8 

87.8 

90.9 

3-0 

76 

63.1 

66.1 

69.1 

72.1 

75-1 

78.1 

81.1 

84.1 

87.1 

90.1 

3-0 

80 

62.6 

65.5 

68.5 

7i.5 

74-5 

77-5 

80.5 

83.4 

86.4 

89.4 

3-0 

84 

62.1 

65.0 

68.0 

70.9 

73.9 

76.8 

79.8 

82.7 

85.7 

88.6 

3-0 

88 

61.6 

64-5 

67.4 

70.4 

73.3 

76.2 

79.1 

82.1 

85.0 

87.9 

2.9 

92 

61.1 

64.0 

66.9 

69.8 

72.7 

75-6 

78.5 

81.4 

84-3 

87.2 

2.9 

96 

60.6 

63.5 

66.4 

69.2 

72.1 

75-0 

77-9 

80.8 

83.7 

86.5 

2-9 

SMITHSONIAN  TABLES. 


62 


TABLE  14. 
REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 

Values  of   2000  X  m.  *»==— ; „ - 

56S73+1 23-  I0+-OQ3Z 


Mean  Tem- 
perature 
of  air 

AI/TITUDE  OF  STATION  IN  FEET  (z). 

Differ- 
ence 
for 

column. 
0  Fahr. 

3100 

3200 

3300 

3400 

3500 

3600 

3700 

3800 

3900 

4000 

100 
Feet. 

-20° 

H4.5 

118.2 

121.9 

125.6 

129.3 

i33.o 

136.7 

140.4 

144.1 

147.8 

3-7 

-16 

ii3-5 

117.2 

120.8 

124.5 

128.1 

131.8 

135-5 

I39-I 

142.8 

146.4 

3-7 

—  12 

112.5 

116.1 

119.7 

123-3 

127.0 

130.6 

134.2 

137.9 

MLS 

I45-I 

3-6 

-  8 

111.5 

115-1 

118.7 

122.3 

125.9 

129.4 

133.0 

136-6 

140.2 

143.8 

3-6 

-   6 

III.O 

II4-5 

118.1 

121.7 

125-3 

128.9 

132.4 

136.0 

139.6 

143.2 

3-6 

-  4 

110.5 

114.0 

117.6 

121.  2 

124.7 

128.3 

131-9 

135-4 

139.0 

142.5 

3-6 

—     2 

IIO.O 

II3-5 

117.1 

120.6 

124.2 

127.7 

131-3 

134.8 

138.4 

141.9 

3-5 

0 

109-5 

113.0 

116.6 

I2O.I 

123.6 

127.2 

130.7 

134.2 

137.8 

141-3 

3-5 

+     2 

109.0 

112.5 

116.1 

II9.6 

123.1 

126.6 

130.1 

133-6 

i37.i 

140.7 

3-5 

4 

108.5 

II2.0 

H5-5 

Iig.O 

122.5 

126.0 

129.5 

133-0 

136.5 

140.0 

3.5 

6 

108.1 

in.  6 

115.0 

II8.5 

122.0 

125-5 

129.0 

132.5 

135-9 

139-4 

3.5 

8 

107.6 

in.  i 

II4-5 

II8.0 

I2I.5 

124.9 

128.4 

I3I-9 

135.4 

138.8 

3-5 

10 

107.1 

110.6 

114.0 

II7-5 

121.  0 

124.4 

127.9 

I3L3 

134.8 

138.2 

3-5 

12 

106.7 

1  10.  1 

113.6 

II7.0 

I2O.4 

123.9 

127.3 

130.7 

134.2 

137.6 

3-4 

14 

106.2 

109.6 

113.1 

II6.5 

II9.9 

123.3 

126.8 

130.2 

133-6 

137.0 

3-4 

16 

105.8 

109.2 

II2.6 

116.0 

II9.4 

122.8 

126.2 

129.6 

i33-o 

136.5 

3-4 

18 

105-3 

108.7 

112.  1 

II5-5 

II8.9 

122.3 

125.7 

129.1 

132.5 

135-9 

3-4 

20 

104.9 

108.2 

in.  6 

115.0 

Il8.4 

121.  8 

125.1 

128.5 

13^.9 

135.3 

3-4 

22 

104.4 

107.8 

in.  i 

H4.5 

II7.9 

121.  2 

124.6 

128.0 

131-3 

134.7 

3-4 

24 

104.0 

107.3 

110.7 

114.0 

II7.4 

120.7 

124.1 

127.4 

130.8 

I34.I 

3-4 

26 

103.5 

106.9 

1  10.  2 

II3-5 

II6.9 

120.2 

123.6 

126.9 

130.2 

133.6 

3.3 

28 

103.1 

106.4 

109.7 

113.1 

II6.4 

II9.7 

123.0 

126.4 

129.7 

I33.o 

3-3 

30 

102.7 

106.0 

109.3 

II2.6 

H5.9 

II9.2 

122.5 

125.8 

129.1 

132.4 

3-3 

32 

102.2 

105.5 

108.8 

II2.I 

II5-4 

Il8.7 

122.0 

125.3 

128.6 

131-9 

3-3 

34 

IOI.8 

105.1 

108.3 

in.  6 

II4.9 

IlS.2 

I2I.5 

124.8 

128.0 

131-3 

3-3 

36 

IOI.3 

104.6 

107.9 

III.  2 

II4.4 

II7.7 

121.  0 

124.2 

127.5 

130.8 

3-3 

38 

IOO.9 

104.1 

107.4 

II0.7 

"3-9 

II7.2 

I2O.4 

123.7 

126.9 

130.2 

3-3 

40 

100.5 

103.7 

107.0 

IIO.  2 

II3-4 

II6.7 

II9.9 

123.2 

126.4 

129.6 

3-2 

42 

roo.o 

103-3 

106.5 

109.7 

113.0 

116.2 

II9.4 

122.6 

125.9 

129.1 

3-2 

44 

99.6 

102.8 

106.0 

109.3 

112.5 

115.7 

II8.9 

122.  1 

125.3 

128.5 

3-2 

46 

99-2 

102.4 

105.6 

108.8 

112.  0 

115.2 

II8.4 

121.  6 

124.8 

128.0 

3-2 

48 

98.8 

101.9 

105.1 

108.3 

111.5 

114.7 

II7.9 

121.  1 

124.2 

127.4 

3-2 

50 

98.3 

101.5 

104.7 

107.9 

III.O 

114.2 

II7.4 

120.5 

123.7 

126.9 

3.2 

52 

97-9 

IOI.I 

104.2 

107.4 

110.5 

113.7 

II6.9 

120.0 

123.2 

126.3 

3-2 

54 

97-5 

100.6 

103.8 

106.9 

'no.  i 

113.2 

II6.4 

II9-5 

122.7 

125.8 

3- 

56 

97.1 

IOO.2 

103.3 

106.5 

109.6 

112.7 

H5.9 

II9.0 

122.  1 

125.2 

3- 

58 

96.7 

99.8 

102.9 

106.0 

109.1 

112.3 

II5.4 

II8.5 

121.  6 

124.7 

3- 

60 

96.3 

99.4 

102.5 

105.6 

108.7 

in.  8 

II4-9 

IlS.O 

I2I.I 

124.2 

3- 

62 

95-9 

98.9 

IO2.O 

105.1 

108.2 

111.3 

II4.4 

H7.5 

120.6 

123.7 

3- 

64 

95-5 

98.5 

101.6 

104.7 

107.8 

1  10.  8 

H3.9 

II7.0 

1  20.  1 

123.1 

3- 

66 

95-1 

98.1 

IOI.2 

104.3 

107.3 

110.4 

H3.5 

II6.5 

II9.6 

122.6 

3- 

68 

94-7 

97.7 

100.8 

103.8 

106.9 

109.9 

II3.0 

116.0 

II9.I 

122.  1 

3- 

70 

94-3 

97.3 

100.3 

103.4 

106.4 

109-5 

II2.5 

II5.5 

II8.6 

121.  6 

3-o 

72 

93-9 

96.9 

99.9 

103.0 

106.0 

109.0 

II2.0 

115.1 

118.1 

121.  1 

3-o 

76 

93-1 

96.1 

99.1 

102.  1 

105.1 

108.1 

III.  I 

114.1 

II7.I 

1  20.  1 

3-0 

80 

92.3 

95.3 

98.3 

IOI.3 

104.3 

107.2 

1  10.  2 

113.2 

116.2 

II9.2 

3-o 

84 

91.6 

94.5 

97.5 

100.5 

103.4 

106.4 

109.3 

112.3 

115.2 

II8.2 

3-0 

88 

90.9 

93.8 

96.7 

99-7 

102.6 

105.5 

108.4 

111.4 

114.3 

II7.2 

2.9 

92 

90.1 

93.0 

96.0 

98.9 

101.8 

104.7 

107.6 

110.5 

113.4 

II6.3 

2-9 

96 

89.4 

92.3 

95-2 

98.1 

IOI.O 

103.8 

106.7 

109!  6 

112.5 

H5.4 

2.9 

SMITHSONIAN  TABLES. 


TABLE  14. 


REDUCTION    OF  THE    BAROMETER  TO  SEA    LEVEL. 

ENGLISH    MEASURES. 
Values  of  2000  X  m. 


56573+ i  23- 


Mean  Tem- 
perature 
of  air 
column. 
0  Fahr. 

ALTITUDE  OF  STATION  IN  FEET  (z). 

Differ- 
ence 
for 
100 
Feet. 

4100 

4200 

4300 

4400 

4500 

4600 

4700 

4800 

4900 

5000 

-20° 

I5L5 

155-2 

158.9 

162.6 

166.3 

170.0 

173.7 

177.3 

181.0 

184.7 

3-7 

-16 

150.1 

153-8 

157-4 

161.1 

164.8 

168.4 

172.1 

175-7 

179-4 

183.1 

3-7 

—  12 

148.8 

152.4 

156.0 

159-6 

163.3 

166.9 

170.5 

174-1 

177-8 

181.4 

3.6 

-   8 

147.4 

151.0 

154.6 

158.2 

161.8 

165.4 

169.0 

172.6 

176.2 

179.8 

3.6 

-    6 

146.8 

150.3 

!53-9 

157.5 

161.1 

164.7 

168.2 

171.8 

175.4 

179.0 

3-6 

-   4 

146.1 

149.7 

153.2 

156.8 

160.4 

163.9 

167.5 

171.0 

174.6 

178.2 

3-6 

—     2 

145-5 

149.0 

152.5 

156.1 

159.6 

163.2 

166.7 

170.3 

173.8 

177.4 

3-5 

0 

144.8 

148.3 

151-9 

155.4 

158.9 

162.5 

1  66.0 

169.5 

I73-I 

176.6 

3-5 

+    2 

144.2 

147.7 

151.2 

154.7 

158.2 

161.8 

165.3 

168.8 

172.3 

175-8 

3-5 

4 

143-5 

147.0 

155-5 

154.0 

157.5 

161.0 

164.5 

168.0 

I7L5 

i75.o 

3-5 

6 

142.9 

146.4 

149.9 

153-4 

156.9 

160.3 

163.8 

167.3 

170.8 

174-3 

3-5 

8 

142.3 

145.8 

149.2 

152.7 

156.2 

159.6 

163.1 

166.6 

170.1 

173-5 

3-5 

10 

141.7 

I45.I 

148.6 

152.0 

155.5 

159.0 

162.4 

165.9 

169.3 

172.8 

3-5 

12 

141.1 

144-5 

147.9 

151-4 

154.8 

158.3 

161.7 

165.1 

168.6 

172.0 

3.4 

14 

140.5 

143-9 

147.3 

150.7 

154.2 

157.6 

161.0 

164.4 

167.9 

I7L3 

3-4 

16 

139-9 

143-3 

146.7 

150.1 

153-5 

156.9 

160.3 

163.7 

167.1 

170.6 

3-4 

18 

139.3 

142.7 

146.1 

149.5 

152.9 

156.2 

159.6 

162.0 

166.4 

169.8 

34 

20 

138.7 

142.1 

145-4 

148.8 

152.2 

155-6 

159-0 

162.3 

165.7 

169.1 

3-4 

22 

138.1 

I4L5 

144.8 

148.2 

151.6 

154.9 

158.3 

161.7 

165.0 

168.4 

3-4 

24 

W5 

140.9 

144.2 

147.6 

150.9 

154.3 

157-6 

161.0 

164.3 

167.7 

3-4 

26 

136.9 

140.3 

143.6 

146.9 

150.3 

153.6 

157-0 

160.3 

163.6 

167.0 

3-3 

28 

136.3 

139.7 

143.0 

146.3 

149.6 

I53.o 

156.3 

159-6 

162.9 

166.3 

3-3 

30 

135.8 

I39-I 

142.4 

145-7 

149.0 

152.3 

155.6 

158.9 

162.2 

165.6 

3.3 

32 

135-2 

138.5 

141.8 

I45.I 

148.4 

I5I.7 

I55.o 

158.3 

161.6 

164.8 

3.3 

34 

134.6 

137.9 

141.2 

144-5 

147-7 

151.0 

154.3 

157.6 

160.9 

164.1 

3-3 

36 

134.0 

137.3 

140.6 

143.8 

147.1 

150.4 

153.6 

156.9 

160.2 

163.4 

3.3 

38 

J33.5 

136.7 

140.0 

143.2 

146.5 

149.7 

153-0 

156.2 

159-5 

162.7 

3-3 

40 

132.9 

136.1 

1394 

142.6 

145.8 

149.1 

152.3 

155-6 

158.8 

162.0 

3.2 

42 

132.3 

135-5 

138.8 

142.0 

145.2 

148.4 

I5L7 

154-9 

158.1 

161.4 

3-2 

44 

131-7 

I35.o 

138.2 

141.4 

144.6 

147.8 

151.0 

154.2 

157-4 

160.7 

3-2 

46 

131.2 

134-4 

137.6 

140.8 

144.0 

147.2 

150.4 

153.6 

156.8 

1  60.0 

3-2 

48 

130.6 

133.8 

137.0 

140.2 

143-4 

146.5 

149.7 

152.9 

156.1 

159.3 

3.2 

50 

130.1 

133-2 

136.4 

139.6 

142.7 

145-9 

149.1 

152.2 

155-4 

158.6 

3.2 

52 

129-5 

132.6 

135.8 

139.0 

142.1 

145.3 

148.4 

151.6 

154.8 

157-9 

3.2 

54 

129.0 

132.1 

135.2 

138.4 

I4L5 

144.7 

147.8 

151.0 

I54.I 

157.2 

3.1 

56 

128.4 

131-5 

134.7 

137.8 

140.9 

144.0 

147.2 

150.3 

153-4 

156.6 

3-i 

58 

127.9 

131.0 

I34.I 

137.2 

140.3 

1434 

146.6 

149.7 

152.8 

155-9 

3-1 

60 

127.3 

130.4 

133.5 

136.6 

139.7 

142.8 

145-9 

149.0 

152.1 

155-2 

3-1 

62 

126.8 

129.9 

I33.o 

136.0 

I39-I 

142.2 

145.3 

148.4 

151-5 

154.6 

3-i 

64 

126.2 

129.3 

132.4 

135.5 

138-6 

141.6 

144.7 

147.8 

150.9 

153.9 

3-i 

66 

125.7 

128.8 

131.8 

134.9 

138.0 

141.0 

144.1 

147.2 

150.2 

153.3 

3-1 

68 

125.2 

128.2 

131-3 

134.3 

137-4 

140.5 

143.5 

146.6 

149.6 

152.7 

3-1 

70 

124.7 

127.7 

130.7 

133.8 

136.8 

J39"9 

142.9 

145-9 

149.0 

152.0 

3-0 

72 

124.2 

127.2 

130.2 

133.2 

136.3 

*39-3 

142.3 

145-3 

148.4 

151-4 

3-0 

76 

123.1 

126.1 

129.1 

132.1 

I35.I 

138.1 

141.2 

144.2 

147.2 

150.2 

3-0 

80 

122.  1 

125.1 

128.1 

131-1 

134.0 

137.0 

140.0 

143.0 

146.0 

148.9 

3.o 

84 

121.  1 

124.0 

127.0 

130.0 

i33.o 

135.9 

138.9 

141.8 

144.8 

147-7 

3-0 

88 

1  20.  2 

123.1 

126.0 

129.0 

131.9 

134.8 

137-7 

140.7 

143.6 

146.5 

2.9 

92 

II9.2 

122.  1 

125.0 

127.9 

130.8 

133-7 

136.6 

139.6 

142.5 

145-4 

2.9 

96 

II8.3 

121.  1 

124.0 

126.9 

129.8 

132.7 

135-6 

138.4 

I4I.3 

144.2 

2.9 

SMITHSONIAN  TABLES. 


TABLE  14. 
REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL, 

ENGLISH    MEASURES. 
Values  of   2000  X  m.  m- 


Mean  Tem- 
perature 
of  air 
column. 
6  Fahr. 

AI/MTUDF,  OF  STATION  IN  FEET  (z). 

Differ- 
ence 
for 
100 
Feet. 

5100 

5200 

5300 

5400 

5500 

5600 

5700 

5800 

5900 

6000 

-20° 

188.4 

192.1 

195.8 

199-5 

203.2 

206.9 

2IO.6 

214-3 

218.0 

221.7 

3-7 

-16 

186.7 

190.4 

194.0 

197.7 

201.4 

205.0 

208.7 

212.3 

216.0 

219.7 

3-7 

—  12 

185.0 

188.7 

192.3 

195.9 

199-5 

203.2 

206.8 

210.4 

214.0 

217.7 

3-6 

-  8 

183.4 

187.0 

190.5 

194.1 

197.7 

201.3 

204.9 

208.5 

2I2.I 

215.7 

3-6 

-   6 

182.5 

186.1 

189.7 

J93-3 

196.9 

200.4 

204.0 

207.6 

211.  2 

214.7 

3-6 

-   4 

181.7 

185-3 

188.9 

192.4 

196.0 

J99-5 

203.1 

206.7 

210.2 

213.8 

3-6 

—     2 

180.9 

184.5 

188.0 

191.6 

I95-I 

198.7 

202.2 

205.7 

209.3 

212.8 

3-5 

0 

180.1 

183.7 

187.2 

190.7 

194-3 

197.8 

201.3 

204.8 

208.4 

2II.9 

3-5 

+    2 

179-3 

182.8 

186.4 

189.9 

1934 

196.9 

200.4 

203.9 

207.5 

211.  0 

3-5 

4 

178.5 

182.0 

185-5 

189.0 

192.5 

196.0 

199.5 

203.0 

206.5 

2IO.O 

3-5 

6 

177-8 

181.3 

184.7 

188.2 

191.7 

195.2 

198.7 

202.2 

205.6 

209.1 

3-5 

8 

177.0 

180.5 

183-9 

187.4 

190.9 

194-3 

197.8 

201.3 

204.8 

208.2 

3.5 

10 

176.2 

179.7 

183.1 

186.6 

190.0 

193.5 

197.0 

200.4 

203.9 

207.3 

3.5 

12 

175-5 

178.9 

182.3 

185.8 

189.2 

192.7 

I96.I 

199-5 

203.0 

206.4 

3-4 

14 

174.7 

178.1 

181.6 

185.0 

188.4 

191.8 

195.3 

198.7 

2O2.I 

205.5 

3-4 

16 

174.0 

177.4 

180.8 

184.2 

187.6 

191.0 

1944 

197.8 

2OI.2 

204.7 

3-4 

18 

173.2 

176.6 

180.0 

183.4 

186.8 

190.2 

193.6 

197.0 

200.4 

203.8 

3-4 

20 

172.5 

175-9 

179.2 

182.6 

186.0 

189.4 

192.8 

196.2 

!99'5 

202.9 

3-4 

22 

171.8 

I75-I 

178.5 

181.9 

185.2 

188.6 

192.0 

195.3 

198.7 

2O2.I 

3-4 

24 

171.0 

174.4 

177-7 

181.1 

184.4 

187.8 

I9I.I 

194.5 

197.8 

2OI.2 

3-4 

26 

170.3 

173.6 

177.0 

180.3 

183.7 

187.0 

190.3 

193.7 

197.0 

200.3 

3-3 

28 

169.6 

172.9 

176.2 

179.6 

182.9 

186.2 

J89.5 

192.9 

196.2 

199-5 

3-3 

30 

168.9 

172.2 

175-5 

178.8 

182.1 

185.4 

188.7 

I92.O 

195.3 

198.7 

3-3 

32 

168.1 

171.4 

174.7 

178.0 

181.3 

184.6 

187.9 

I9I.2 

194.5 

197.8 

3-3 

34 

167.4 

170.7 

174.0 

177-3 

180.6 

183.8 

187.1 

190.4 

J93-7 

197.0 

3-3 

36 

166.7 

170.0 

173.2 

176.5 

179-8 

183.1 

186.3 

189.6 

192.9 

I96.I 

3.3 

38 

166.0 

169.3 

172.5 

175-8 

179.0 

182.3 

185-5 

188.8 

192.0 

195.3 

3-3 

40 

165.3 

168.5 

171.8 

175-0 

178.2 

181.5 

184.7 

188.0 

191.2 

194.4 

3-2 

42 

164.6 

167.8 

171.0 

174-3 

177.5 

180.7 

183.9 

187.2 

190.4 

193.6 

3-2 

44 

163.9 

167.1 

170.3 

173.5 

176.7 

179.9 

183.1 

186.4 

189.6 

192.8 

3-2 

46 

163.2 

166.4 

169.6 

172.8 

176.0 

179.2 

182.4 

185.6 

188.7 

192.0 

3«2 

48 

162.5 

165.6 

168.8 

172.0 

175.2 

178.4 

181.6 

184.8 

187.9 

I9I.I 

3-2 

50 

161.8 

164.9 

168.1 

I7L3 

174.4 

177.6 

180.8 

184.0 

187.1 

190.3 

3.2 

52 

161.1 

164.2 

167.4 

170.5 

173-7 

176.9 

180.0 

183.2 

186.3 

189.5 

3-2 

54 

160.4 

163.5 

166.7 

169.8 

173.0 

176.1 

179.2 

182.4 

185-5 

188.7 

3. 

56 

159.7 

162.8 

166.0 

169.1 

172.2 

175.4 

178.5 

181.6 

184.7 

187.9 

3. 

58 

159.0 

162.1 

165.3 

168.4 

I7I.5 

174.6 

177.7 

180.8 

184.0 

I87.I 

3- 

60 

158.4 

161.5 

164.6 

167.7 

170.8 

173-9 

177.0 

180.1 

183.2 

186.3 

3. 

62 

157.7 

160.8 

163.9 

167.0 

170.1 

I73-I 

176.2 

179-3 

182.4 

185.5 

3. 

64 

i57-o 

1  60.  i 

163.2 

166.3 

169.3 

172.4 

175-5 

178.6 

181.6 

184.7 

3. 

66 

156.4 

159-4 

162.5 

165.6 

168.6 

171.7 

174-8 

177.8 

180.9 

184.0 

3-1 

68 

155.7 

158.8 

161.8 

164.9 

167.9 

171.0 

174.0 

177.1 

180.1 

183.2 

3.i 

70 

I55.I 

158.1 

161.1 

164.2 

167.2 

170.3 

173-3 

176.3 

1794 

182.4 

3-0 

72 

154.4 

157.5 

160.5 

163.5 

166.5 

169.6 

172.6 

175-6 

178.6 

I8I.7 

3.o 

76 

153-2 

156.2 

159-2 

162.2 

165.2 

168.2 

171.2 

174.2 

177.2 

180.2 

3-0 

80 

I5L9 

154-9 

157.9 

160.8 

163.8 

166.8 

169.8 

172.8 

175-7 

178.7 

3.° 

84 

150.7 

153.6 

156-6 

159-5 

162.5 

165.5 

168.4 

171.4 

174.3 

177-3 

3-0 

88 

M9.5 

152.4 

155.3 

158.3 

161.2 

164.1 

167.0 

170.0 

172.9 

175-8 

2-9 

92 

148.3 

151-2 

I54.I 

157.0 

159.9 

162.8 

165.7 

168.6 

I7L5 

174.4 

2.9 

96 

147.1 

150.0 

152.9 

155.7 

158.6 

161.5 

164.4 

167.3 

170.2 

173.0 

2.9 

SMITHSONIAN  TABLES. 


TABLE  14. 

REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 
Values  of   2000  X  m. 


56573+1 23-  I0+-Q03Z 


Mean  Tem- 
perature 
of  air 
column. 
6  Fahr. 

AI/MTUDE  OF  STATION  IN  FEET  (z). 

Differ- 
ence 
for 
100 
feet. 

6100 

6200 

6300 

6400 

6500 

6600 

6700 

6800 

6900 

7000 

-20° 

225.4 

229.1 

232.8 

236.4 

240.1 

243.8 

247.5 

251.2 

254-9 

258.6 

3-7 

-16 

223-3 

227.0 

230.6 

234-3 

237.9 

241.6 

245-3 

248.9 

252.6 

256.2 

3-7 

—  12 

221.3 

224.9 

228.5 

232.2 

235.8 

239-4 

243.0 

246.7 

250.3 

253-9 

3-6 

-  8 

219.3 

222.9 

226.5 

230.1 

233-7 

237.3 

240.9 

244.5 

248.1 

251.6 

3-6 

-   6 

218.3 

221.9 

225.5 

229.1 

232.6 

236.2 

239-8 

243-4 

246.9 

250.5 

3-6 

-   4 

217.4 

220.9 

224.5 

228.0 

231.6 

235-2 

238.7 

242.3 

245.8 

249.4 

3-6 

—     2 

216.4 

219-9 

223.5 

227.0 

230.6 

234.1 

237.7 

241.2 

244.8 

248.3 

3-5 

0 

215.4 

219.0 

222.5 

226.0 

229.6 

233.1 

236.6 

240.1 

243-7 

247.2 

3-5 

+    2 

214.5 

218.0 

221.5 

225.0 

228.5 

232.1 

235-6 

239.1 

242.6 

246.1 

3-5 

4 

213-5 

217.0 

220.5 

224.0 

227.5 

231.0 

234.5 

238.0 

241.5 

245.0 

3-5 

6 

212.6 

216.  i 

219.6 

223.1 

226.6 

230.0 

233-5 

237-0 

240.5 

244.0 

3-5 

8 

211.7 

215.2 

218.6 

222.1 

225.6 

229.0 

232.5 

236.0 

239-4 

242.9 

3-5 

10 

210.8 

214.2 

217.7 

221.  1 

224.6 

228.0 

231.5 

235-0 

238.4 

241.9 

3-5 

12 

209.9 

213-3 

216.7 

220.2 

223.6 

227.1 

230-5 

233-9 

237.4 

240.8 

3.4 

14 

209.0 

212.4 

215-8 

219.2 

222.7 

226.1 

229.5 

232.9 

236.4 

239.8 

3-4 

16 

208.  1 

211.5 

214.9 

218.3 

221.7 

225.1 

228.5 

231.9 

235.3 

238.8 

3-4 

18 

207.2 

210.6 

214.0 

217.4 

220.8 

224.2 

227.6 

230.9 

234-3 

237-7 

3-4 

20 

206.3 

209.7 

213.1 

216.4 

219.8 

223.2 

226.6 

230.0 

233-3 

236.7 

3-4 

22 

^205.4 

208.8 

212.2 

215.5 

218.9 

222.3 

225.6 

229,0 

232.4 

235-7 

3-4 

24 

204.6 

207.9 

2II.3 

214.6 

218.0 

221.3 

224.7 

228.0 

231.4 

234-7 

3-4 

26 

203.7 

207.0 

210.4 

213.7 

217.0 

220.4 

223.7 

227.0 

230.4 

233-7 

3-3 

28 

202.8 

206.2 

209.5 

212.8 

216.1 

219.4 

222.8 

226.1 

229.4 

232.7 

3-3 

30 

202.0 

205.3 

208.6 

2II.9 

215.2 

218.5 

221.8 

225.1 

228.4 

231.8 

3-3 

32 

201.  1 

204.4 

207.7 

211.  0 

214.3 

217.6 

22O.9 

224.2 

227.5 

230.8 

3.3 

34 

200.2 

203.5 

206.8 

2IO.I 

213.4 

216.7 

219.9 

223.2 

226.5 

229.8 

3.3 

36 

199.4 

202.7 

205.9 

209.2 

212.5 

215-7 

2I9.O 

222.3 

225.5 

228.8 

3-3 

38 

198.5 

201.8 

205.0 

208.3 

211.  6 

214.8 

218.1 

221.3 

224.6 

227.8 

3.3 

40 

197.7 

200.9 

204.2 

207.4 

2IO.6 

213.9 

217.1 

220.4 

223.6 

226.8 

3-2 

42 

196.8 

2OO.I 

203.3 

206.5 

209.7 

213.0 

2l6.2 

219.4 

222.6 

225.9 

3-2 

44 

196.0 

199.2 

202.4 

205.6 

208.8 

212.  1 

215-3 

218.4 

221.7 

224.9 

3-2 

46 

195.2 

198.4 

201.5 

204.7 

207.9 

211.  1 

214.3 

217-5 

220.7 

223.9 

3-2 

48 

194-3 

197.5 

200.7 

203.9 

207.0 

210.2 

213.4 

216.6 

219.8 

223.0 

3-2 

50 

193-5 

196.6 

I99.8 

203.0 

206.2 

209.3 

212.5 

215-7 

218.8 

222.  0 

3.2 

52 

192.6 

195.8 

199.0 

202.1 

205.3 

208.4 

211.  6 

214.7 

217.9 

221.  1 

3.2 

54 

I9I.8 

195.0 

I9§.I 

201.3 

204.4 

207.5 

210.7 

213.8 

217.0 

220.1 

3- 

56 

I9I.O 

194.1 

I97.3 

200.4 

203.5 

206.7 

209.8 

212.9 

216.0 

219.2 

3- 

58 

190.2 

193.3 

196.4 

199.5 

202.7 

205.8 

208.9 

212.0 

215.1 

218.3 

3- 

60 

189.4 

192.5 

195.6 

198.7 

201.8 

204.9 

208.0 

211.  1 

214.2 

217.3 

3- 

62 

188.6 

191.7 

194.8 

197.9 

201.0 

204.1 

207.2 

2IO.2 

213-3 

2l6.4 

3- 

64 

187.8 

190.9 

194.0 

197.0 

200.1 

203.2 

206.3 

209.3 

212.4 

215.5 

3- 

66 

187.0 

190.1 

I93-I 

196.2 

199-3 

202.3 

205.4 

208.5 

211.5 

214.6 

3-i 

68 

186.2 

189.3 

192.3 

195.4 

198.4 

201.5 

204.6 

207.6 

210.7 

213.7 

3-0 

70 

185.5 

188.5 

I9L5 

194.6 

197.6 

200.7 

203.7 

206.7 

209.8 

212.8 

3-0 

72 

184.7 

187.7 

190.8 

193.8 

196.8 

I99.8 

202.9 

205.9 

208.9 

2II-9 

3-0 

76 

183.2 

186.2 

189.2 

192.2 

195.2 

198.2 

201.2 

204.2 

207.2 

210.2 

3-0 

80 

lSl.7 

184.7 

187.6 

190.6 

193.6 

196.6 

199.6 

202.5 

205.5 

208.5 

3.o 

84 

180.2 

183.2 

186.1 

189.1 

I92.O 

195.0 

197.9 

2OO.9 

203.8 

206.8 

3-0 

88 

178.8 

181.7 

184.6 

187.6 

I9°.5 

193.4 

196.3 

199-3 

2O2.2 

205.1 

2.9 

92 

177-3 

180.2 

183.2 

I86.I 

189.0 

I9I.9 

194.8 

197.7 

200.6 

203.5 

2.9 

96 

175-9 

178.8 

181.7 

184.6 

187.5 

190.3 

193.2 

196.1 

199.0 

201.9 

2.9 

SMITHSONIAN  TABLES. 


66 


TABLE  14 
REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 


Values  of   2000  X  m. 


56573+  I23-I0+.003Z 


Mean  Tem- 
perature 
of  air 
column. 
6  Fahr. 

ALTITUDE  OF  STATION  IN  FEET  (z). 

Differ- 
ence 
for 
100 
Feet. 

7100 

7200 

7300 

7400 

7500 

7600 

7700 

7800 

7900 

8000 

-20° 

262.3 

266.0 

269.7 

273.4 

277.1 

280.8 

284.5 

288.1 

291.8 

295.5 

3-7 

-16 

259-9 

263.6 

267.2 

270.9 

274-5 

278.2 

281.9 

285-5 

289.2 

292.8 

3-7 

—  12 

257.6 

261.2 

264.8 

268.4 

272.1 

275-7 

279.3 

282.9 

286.6 

290.2 

3-6 

-   8 

255-2 

258.8 

262.4 

266.0 

269.6 

273-2 

276.8 

280.4 

284.0 

287.6 

3-6 

-    6 

254.1 

257-7 

261.3 

264.8 

268.4 

272.0 

275.6 

279.1 

282.7 

286.3 

3-6 

-    4 

253-0 

256.5 

260.1 

263.7 

267.2 

270.8 

274-3 

277.9 

281.5 

285.0 

3-6 

—     2 

251.8 

255-4 

258.9 

262.5 

266.0 

269.6 

273.1 

276.7 

280.2 

283.8 

3-5 

0 

250.7 

254-3 

257.8 

261.3 

264.9 

268.4 

271.9 

275-4 

279.0 

282.5 

3-5 

+     2 

249.6 

253-1 

256.7 

260.2 

263.7 

267.2 

270.7 

274.2 

277.8 

281.3 

3-5 

4 

248.5 

252.0 

255.5 

259.0 

262.5 

266.0 

269.5 

273.0 

276.5 

280.0 

3-5 

6 

247.5 

250.9 

254-4 

257.9 

261.4 

264.9 

268.4 

271.8 

275-3 

278.8 

3-5 

8 

246.4 

249.8 

253-3 

256.8 

260.3 

263.7 

267.2 

270.7 

274.1 

277.6 

3-5 

10 

245.3 

248.8 

252.2 

255-7 

259-1 

262.6 

266.0 

269.5 

272.9 

276.4 

3-5 

12 

244.3 

247.7 

251.1 

254-6 

258.0 

261.4 

264.9 

268.3 

271.8 

275.2 

3-4 

14 

243-2 

246.6 

250.1 

253.5 

256.9 

260.3 

263.8 

267.2 

270.6 

274.0 

3-4 

16 

242.2 

245.6 

249.0 

252.4 

255.8 

259-2 

262.6 

266.0 

269.4 

272.8 

3-4 

18 

241.1 

244-5 

247-9 

251-3 

254.7 

258.1 

261.5 

264.9 

268.3 

271.7 

3-4 

20 

240.1 

243-5 

246.9 

250.2 

253-6 

257.0 

260.4 

263.8 

267.1 

270.5 

3.4 

22 

239.1 

242.4 

245.8 

249.2 

252.5 

255-9 

259-3 

262.6 

266.0 

269.4 

3-4 

24 

238.1 

241.4 

244.8 

248.1 

251.5 

254.8 

258.2 

261.5 

264.9 

268.2 

3-4 

26 

237.1 

240.4 

243-7 

247.1 

250.4 

253.8 

257-1 

260.4 

263.8 

267.1 

3-3 

28 

236.1 

2394 

242.7 

246.0 

249.4 

252.7 

256.0 

259.3 

262.7 

266.0 

3-3 

30 

235-1 

238.4 

241.7 

245.0 

248.3 

251.6 

254-9 

258.2 

261.5 

264.8 

3-3 

32 

234.1 

237.4 

240.7 

243-9 

247.2 

250.5 

253-8 

257-1 

260.4 

263.7 

3-3 

34 

233-1 

236.3 

239.6 

242.9 

246.2 

249-5 

,252.8 

256.0 

259-3 

262.6 

3-3 

36 

232.1 

235.3 

238.6 

241.9 

245.1 

248.4 

251-7 

254.9 

258.2 

261.5 

3-3 

38 

231.1 

234.3 

237.6 

240.8 

244.1 

247-3 

250.6 

253.9 

257-1 

260.4 

3-3 

40 

230.1 

233-3 

236.6 

239.8 

243.0 

246.3 

249-5 

252.8 

256.0 

259.2 

3-2 

42 

229.1 

232.3 

235.5 

238.8 

242.0 

245.2 

248.4 

251-7 

254-9 

258.1 

3-2 

44 

228.1 

231.3 

234.5 

237.7 

241.0 

244.2 

247.4 

250.6 

253-8 

257.0 

3-2 

46 

227.1 

230.3 

233-5 

236.7 

239-9 

243-1 

246.3 

249-5 

252.7 

255.9 

3-2 

48 

226.2 

229.3 

232.5 

235.7 

238.9 

242.1 

245.3 

248.4 

251.6 

254.8 

3-2 

50 

225.2 

228.4 

231-5 

234.7 

237.9 

241.0 

244.2 

247-4 

250.5 

253.7 

3-2 

52 

224.2 

227.4 

230.5 

233-7 

236.8 

240.0 

243.2 

246.3 

249-5 

252.6 

3-2 

54 

223.3 

226.4 

229.5 

232.7 

235.8 

239.0 

242.1 

245-3 

248.4 

251-5 

3-i 

56 

222.3 

225.4 

228.6 

231.7 

234.8 

238.0 

241.1 

244.2 

247-3 

250.5 

3-1 

58 

221.4 

224.5 

227.6 

230.7 

233-8 

236.9 

240.1 

243-2 

246.3 

249.4 

3-i 

60 

220.4 

223-5 

226.6 

229.7 

232.8 

235.9 

239.1 

242.2 

245-3 

248.4 

3-1 

62 

219.5 

222.6 

225.7 

228.8 

231.9 

235-0 

238.0 

241.1 

244.2 

247-3 

3-i 

64 

218.6 

221.7 

224.7 

227.8 

230.9 

234.0 

237.0 

240.1 

243.2 

246.3 

3-i 

66 

217.7 

220.7 

223.8 

226.9 

229.9 

233-0 

236.1 

239.1 

242.2 

245-2 

3-1 

68 

216.8 

219.8 

222.9 

225.9 

229.0 

232.0 

235-1 

238.1 

241.2 

244.2 

3-0 

70 

215-9 

2l8.9 

221.9 

225.0 

228.0 

231.1 

234-1 

237.1 

240.2 

243-2 

3-o 

72 

215.0 

218.0 

221.  0 

224.1 

227.1 

230.1 

233.1 

236.2 

239.2 

242.2 

3-0 

76 

213.2 

216.2 

219.2 

222.2 

225.2 

228.2 

231.2 

234-2 

237.2 

240.2 

3-0 

80 

211.5 

214.4 

217.4 

220.4 

223.4 

226.4 

229.3 

232.3 

235-3 

238.3 

3-0 

84 

209.8 

212.7 

215-7 

218.6 

221.6 

224.5 

227.5 

230.4 

233-4 

236.3 

2.9 

88 

208.1 

211.  0 

213.9 

216.9 

219.8 

222.7 

225.6 

228.6 

231.5 

234-4 

2.9 

92 

206.4 

209.3 

212.2 

2I5.I 

218.0 

220.9 

223.8 

226.7 

229.7 

232.6 

2-9 

96 

204.8 

207.6 

210.5 

2134 

216.3 

219.2 

222.1 

224.9 

227.8 

230.7 

2.9 

SMITHSONIAN  TABLES. 


67 


TABLE  14. 

REDUCTION    OF  THE    BAROMETER   TO    SEA   LEVEL. 

ENGLISH    MEASURES. 

Values  of   2000  X  m. 


56573+ i23. 


Mean  Tern- 
perature 
of  air 
column. 

0  Fahr. 

ALTITUDE  OF  STATION  IN  FEET  (z). 

Differ, 
ence 
for 
100 
Feet. 

8100 

8200 

8300 

8400 

8500 

8600 

8700 

8800 

8900 

9000 

-20° 

299.2 

302.9 

306.6 

310.3 

314.0 

317.7 

321.4 

325-1 

328.8 

332.5 

3-7 

-16 

296.5 

300.2 

303-8 

307.5 

311-1 

314.8 

318.4 

322.1 

325-8 

329-4 

3-7 

—  12 

293.8 

297.4 

301.1 

304-7 

308.3 

3H.9 

315.6 

319.2 

322.8 

326.4 

3-6 

-   8 

291.2 

294.8 

298.4 

302.0 

305.5 

309.1 

312.7 

316.3 

319.9 

323.5 

3.6 

-    6 

289.9 

293-5 

297.0 

300.6 

304.2 

307.8 

3H.3 

3r4-9 

318.5 

322.1 

3-6 

-    4 

288.6 

292.1 

295.7 

299-3 

302.8 

306.4 

309-9 

3I3-5 

3I7.I 

320.6 

3-6 

—     2 

287.3 

290.9 

2944 

297.9 

301.5 

305.0 

308.6 

312.1 

3i5'7 

319.2 

3-5 

0 

286.0 

289.6 

293.1 

296.6 

300.2 

303.7 

307-2 

310.7 

3H.3 

317.8 

3-5 

+     2 

284.8 

288.3 

291.8 

295-3 

298.8 

302.4 

305.9 

309.4 

312.9 

316.4 

3-5 

4 

283-5 

287.0 

290.5 

294.0 

297.5 

301.0 

304-5 

308.0 

3II-5 

3i5.o 

3.5 

6 

282.3 

285.8 

289-3 

292.7 

296.2 

299-7 

303-2 

306.7 

310.2 

313-6 

3-5 

8 

281.1 

284.5 

288.0 

29I-5 

294.9 

298.4 

301.9 

305.3 

308.8 

312.3 

3.5 

10 

279.8 

283.3 

286.8 

290.2 

293.7 

297.1 

300.6 

304.0 

307.5 

310.9 

3-5 

12 

278.6 

282.1 

285.5 

289.0 

292.4 

295.8 

299-3 

302.7 

306.2 

309-6 

3-4 

14 

277-5 

280.9 

284.3 

287.7 

291.1 

294.6 

298.0 

301.4 

304-8 

308.3 

3.4 

16 

276.3 

279.7 

283.1 

286.5 

289.9 

293.3 

296.7 

300.1 

303-5 

306.9 

3-4 

18 

275-1 

278.5 

281.9 

285.3 

288.7 

292.1 

295.4 

298.8 

302.2 

305.6 

3-4 

20 

273.9 

277.3 

280.7 

284.0 

287.4 

290.8 

294.2 

297.6 

300.9 

304-3 

3-4 

22 

272.7 

276.1 

279-5 

282.8 

286.2 

289.6 

292.9 

296.3 

299.7 

303-0 

3-4 

24 

271.6 

274.9 

278.3 

281.6 

285.0 

288.3 

291.7 

295-0 

298.4 

301.8 

3-4 

26 

270.4 

273.8 

277.1 

280.5 

283.8 

287,1 

290.5 

293.8 

297.1 

300.5 

3-3 

28 

269.3 

272.6 

275.9 

279-3 

282.6 

285.9 

289.2 

292.6 

295.9 

299.2 

3-3 

30 

268.2 

27L5 

274.8 

278.1 

281.4 

284.7 

288.0 

291.3 

294.6 

297.9 

3-3 

32 

267.0 

270.3 

273-6 

276.9 

280.2 

283.5 

286.8 

290.1 

293-4 

296.7 

3-3 

34 

265.9 

269.2 

272.4 

275-7 

279.0 

282.3 

285.6 

288.8 

292.1 

295.4 

3.3 

36 

264.7 

268.0 

271.3 

274-5 

277-8 

281.1 

284.3 

287.6 

290.9 

294.1 

3-3 

38 

263.6 

266.9 

270.1 

273-4 

276.6 

279-9 

283.1 

286.4 

289.6 

292.9 

3-3 

40 

262.5 

265.7 

269.0 

272.2 

275-4 

278.7 

281.9 

285.2 

288.4. 

291.6 

3-2 

42 

261.4 

264.6 

267.8 

271.0 

274-3 

277-5 

280.7 

283.9 

287.2 

290.4 

3-2 

44 

260.2 

263.4 

266.7 

269.9 

273.1 

276.3 

279.5 

282.7 

285-9 

289.1 

3-2 

46 

259-  1 

262.3 

265.5 

268.7 

271.9 

275-1 

278.3 

281.5 

284.7 

287.9 

3-2 

48 

258.0 

261.2 

264.4 

267.5 

270.7 

273-9 

277.1 

280.3 

283-5 

286.6 

3.2 

50 

256.9 

260.1 

263.2 

266.4 

269.6 

272.7 

275.9 

279.1 

282.2 

285.4 

3-2 

52 

255-8 

258.9 

262.1 

265.3 

268.4 

271.6 

274.7 

277.9 

281.0 

284.2 

3.1 

54 

254.7 

257.8 

261.0 

264.1 

267.3 

270.4 

273-5 

276.7 

279.8 

283.0 

3- 

56 

253-6 

256.7 

259-9 

263.0 

266.1 

269.3 

272.4 

275-5 

278.6 

281.8 

3- 

58 

252.5 

255-6 

258.8 

261.9 

265.0 

268.1 

271.2 

274.3 

277.5 

280.6 

3- 

60 

251-5 

254.6 

257-7 

260.8 

263.9 

267.0 

270.1 

273.2 

276.3 

279.4 

3- 

62 

250.4 

253-5 

256.6 

259-7 

262.8 

265.9 

268.9 

272.0 

275.1 

278.2 

3- 

64 

249.4 

252.4 

255-5 

258.6 

261.7 

264.7 

267.8 

270.9 

274-0 

277.1 

3- 

66 

248.3 

251.4 

254.4 

257.5 

260.6 

263.6 

266.7 

269.8 

272.8 

275-9 

3- 

68 

247.3 

250-3 

253-4 

256.4 

259.5 

262.5 

265.6 

268.6 

271.7 

274.7 

3.o 

70 

246.3 

249-3 

252.3 

255.4 

258.4 

261.4 

264.5 

267.5 

270.6 

273.6 

3-o 

72 

245.2 

248.3 

251-3 

254.3 

257-3 

260.4 

263.4 

266.4 

269.4 

272.5 

3-0 

76 

243.2 

246.2 

249.2 

252.2 

255.2 

258.2 

261.2 

264.2 

267.2 

270.2 

3-0 

80 

241.2 

244.2 

247.2 

250.2 

253-1 

256.1 

259.1 

262.1 

265.1 

268.0 

3-0 

84 

239-3 

242.2 

245.2 

248.1 

251.1 

254.1 

257-0 

260.0 

262.9 

265.9 

2-9 

88 

237-4 

240.3 

243.2 

246.1 

249.1 

252.0 

254.9 

257-9 

260.8 

263.7 

2-9 

92 

235-5 

238.4 

241.3 

244.2 

247.1 

250.0 

252.9 

255.8 

258.7 

261.6 

2-9 

96 

233-6 

236.5 

239-4 

242.2 

245.1 

248.0 

250.9 

253-8 

256.7 

259-5 

2.9 

SMITHSONAN  TABLES. 


68 


TABLE  15. 
REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 
Correction    of   2000m    for    Latitude:    2000  m  X  0.002662  cos  2  <j>. 

For  latitudes  o°  to  45°,  the  correction  is  to  be  subtracted. 
For  latitudes  45°  to  90°,  the  correction  is  to  be  added. 


,ooom. 

»««**. 

0° 

5° 

10° 

15° 

20° 

25° 

30° 

35° 

40° 

45° 

10 

o.o 

o.o 

o.o 

o.o 

o.o 

0,0 

o.o 

0.0 

o.o 

o.o 

20 

O.I 

O.I 

O.I 

o.o 

o.o 

o.o 

0.0 

0.0 

o.o 

0.0 

30 

O.I 

O.I 

O.I 

O.I 

O.I 

O.I 

0.0 

o.o 

0.0 

0.0 

40 

O.I 

O.I 

O.I 

O.I 

O.I 

O.I 

O.I 

0.0 

0.0 

o.o 

50 

O.I 

O.I 

O.I 

O.I 

O.I 

O.I 

O.I 

0.0 

o.o 

0.0 

60 

0.2 

0.2 

O.2 

O.I 

O.I 

O.I 

O.I 

O.I 

0.0 

0.0 

70 

0.2 

O.2 

O.2 

0.2 

O.I 

O.I 

O.I 

O.I 

0.0 

0.0 

80 

O.2 

0.2 

0.2 

0.2 

0.2 

O.I 

O.I 

O.I 

0.0 

0.0 

90 

O.2 

0.2 

0.2 

0.2 

O.2 

0.2 

O.I 

O.I 

0.0 

0.0 

100 

0-3 

0-3 

0-3 

0.2 

0.2 

O.2 

O.I 

O.I 

0.0 

o.o 

no 

0-3 

0.3 

°-3 

°-3 

O.2 

0.2 

O.I 

O.I 

O.I 

0.0 

120 

0-3 

o-3 

°-3 

0-3 

0.2 

0.2 

0.2 

O.I 

O.I 

0.0 

130 

°-3 

0.3 

0-3 

0-3 

0-3 

O.2 

O.2 

O.I 

O.I 

0.0 

140 

0.4 

0.4 

0.4 

0.3 

0'3 

O.2 

0.2 

O.I 

O.I 

o.o 

150 

0.4 

0.4 

0.4 

0.3 

0-3 

0-3 

0.2 

O.I 

O.I 

0.0 

160 

0.4 

0.4 

0.4 

0.4 

0-3 

0.3 

O.2 

O.I 

O.I 

0.0 

170 

0.5 

0.4 

0.4 

0.4 

0-3 

0-3 

0.2 

0.2 

O.I 

o.o 

180 

o.5 

0.5 

0.5 

0.4 

0.4 

0-3 

0.2 

O.2 

O.I 

0.0 

190 

0-5 

o-5 

0-5 

0.4 

0.4 

0-3 

°-3 

0.2 

O.I 

0.0 

200 

0-5 

0.5 

0.5 

0-5 

0.4 

0-3 

o-3 

O.2 

O.I 

0.0 

210 

0.6 

0.6 

0.5 

o.5 

0.4 

0.4 

0.3 

O.2 

O.I 

0.0 

220 

0.6 

0.6 

0.6 

o.5 

0.4 

0.4 

0.3 

0.2 

O.I 

0.0 

230 

0.6 

0.6 

0.6 

0-5 

0-5 

0.4 

0.3 

0.2 

O.I 

o.o 

240 

0.6 

0.6 

0.6 

0.6 

0-5 

0.4 

o-3 

O.2 

O.I 

0.0 

250 

0.7 

0.7 

0.6 

0.6 

0.5 

0.4 

0.3 

0.2 

O.I 

0.0 

260 

0.7 

0.7 

0.7 

0.6 

0-5 

0.4 

0.3 

0.2 

O.I 

o.o 

270 

0.7 

0.7 

0.7 

0.6 

0.6 

0-5 

0.4 

O.2 

O.I 

0.0 

280 

0.7 

0.7 

0.7 

0.6 

0.6 

0.5 

0.4 

0-3 

O.I 

0.0 

290 

0.8 

0.8 

0.7 

0.7 

0.6 

0.5 

0.4 

0-3 

O.I 

0.0 

300 

0.8 

0.8 

0.8 

0.7 

0.6 

0.5 

0.4 

0.3 

O.I 

0.0 

310 

0.8 

0.8 

0.8 

0.7 

0.6 

0-5 

0.4 

0-3 

O.I 

0.0 

320 

0.9 

0.8 

0.8 

0.7 

0.7 

0.5 

0.4 

0-3 

O.I 

0.0 

330 

0.9 

0.9 

0.8 

0.8 

0.7 

0.6 

0.4 

0.3 

0.2 

0.0 

340 

0.9 

0.9 

0.9 

0.8 

0.7 

0.6 

0.5 

0.3 

0.2 

0.0 

350 

0.9 

0.9 

0.9 

0.8 

0.7 

0.6 

0.5 

o-3 

0.2 

o.o 

90° 

85° 

80° 

75° 

70° 

65° 

60° 

55° 

50° 

45 

SMITHSONIAN  TABLE*. 


TABLE  16. 

REDUCTION 


OF  THE    BAROMETER    TO    SEA    LEVEL, 

ENGLISH    MEASURES. 
Bo-B=  B  (10W-1). 

Top  argument :     Height  of  the  barometer  (B). 

Side  argument :     Values  of  2000  m  obtained  from  Table  14. 


2000  m. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

31.0 

30.5 

30.O 

29.5 

29.O 

28.5 

28.0 

27.5 

27.0 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

I 

0.04 

0.04 

0.03 

0.03 

0.03 

0.03 

2 

0.07 

a  07 

0.07 

0.07 

0.07 

0.07 

3 

O.II 

O.II 

O.IO 

O.IO 

O.IO 

O.IO 

4 

0.14 

0.14 

0.14 

0.14 

0.13 

0.13 

5 

0.18 

0.18 

0.17 

0.17 

0.17 

0.16 

6 

0.21 

O.2I 

O.2I 

O.2O 

0.20 

0.20 

0.19 

7 

0.25 

0.25 

O.24 

O.24 

0.23 

0.23 

0.23 

8 

0.29 

0.28 

0.28 

O.27 

0.27 

0.26 

0.26 

9 

0.32 

0.32 

0.31 

0.31 

0.30 

0.30 

0.29 

10 

0.36 

0-35 

0-35 

0-34 

0-34 

0.33 

0.32 

ii 

0.40 

0-39 

0.38 

0.38 

0-37 

0.36 

0.36 

12 

0.43 

0.42 

0.42 

0.41 

0.40 

0.40 

0-39 

13 

0.47 

0.46 

0-45 

0-44 

0.44 

0.43 

0.42 

14 

0.50 

0.50 

0.49 

0.48 

0-47 

0.46 

0.46 

15 

0-54 

0.53 

0.52 

0.51 

0.51 

0.50 

0.49 

16 

0.58 

0-57 

0.56 

0-55 

0-54 

0.53 

0.52 

17 

0.61 

0.60 

0.59 

0.58 

0-57 

0.56 

0.55 

18 

0.65 

0.64 

0.63 

O.62 

0.61 

0.60 

0-59 

19 

0.69 

0.67 

0.66 

0.65 

0.64 

0.63 

0.62 

20 

0.72 

0.71 

0.70 

0.69 

0.68 

0.66 

0.65 

21 

0-75 

0-73 

0.72 

0.71 

0.70 

0.69 

22 
23- 

0.78 
0.82 

0.77 
0.80 

0.76 
0.79 

0.74 
0.77 

0-73 
0.76 

0.72 

0-75 

0.71 
0-74 

24 

0.85 

0.84 

0.83 

0.81 

0.80 

0.78 

0.77 

25 

0.89 

0.88 

0.86 

0.85 

0.83 

0.82 

0.8o 

26 

0-93 

0.91 

0.90 

0.88 

0.87 

0.85 

0.84 

27 

0.96 

0-95 

o.93 

0.92 

0.90 

0.88 

0.87 

28 

I.OO 

0.98 

0.97 

0-95 

0-93 

0.92 

0.90 

29 

1.04 

1.02 

I.OO 

0.98 

0.97 

o.95 

0-93 

30 

1.07 

1.05 

1.04 

1.02 

I.OO 

0.98 

0.97 

3i 

I.  II 

1.09 

1.07 

1.05 

1.04 

1.02 

I.OO 

32 

1.14 

I.I| 

I.  II 

1.09 

1.07 

1.05 

1.03 

33 

1.18 

1.16 

1.14 

1.  12 

1.  10 

1.08 

1.06 

34 

1.22 

i.  20 

1.18 

1.16 

1.14 

1.  12 

I.IO 

35 

1-25 

1.23 

1.  21 

1.19 

1.17 

I-I5 

1-13 

36 

1.27 

1-25 

1.23 

1.  21 

1.18 

.16 

37 

1.31 

1.28 

.26 

1.24 

1.22 

.20 

38 

1-34 

1.32 

.30 

1.27 

1.25 

.23 

.21 

39 

1.38 

1-35 

•33 

I-3I 

1.29 

.26 

.24 

40 

i  41 

i-39 

•37 

1.34 

1.32 

.30 

•27 

4i 

1-45 

i.43 

.40 

1.38 

1.35 

•33 

•30 

42 

1.49 

1.46 

1.44 

I.4I 

i-39 

.36 

•34 

43 

1.52 

1.50 

1.47 

1-45 

1.42 

.40 

•37 

44 

1.56 

1-53 

i.5i 

1.48 

1-45 

•43 

.40 

45 

1.60 

1-57 

i.54 

1.52 

1.49 

.146 

1.44 

SMITHSONIAN  TABLES. 


TABLE  16 


REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 

B0-B=B  (10^-1). 

Top  argument :     Height  of  the  barometer  (B). 

Side  argument :     Values  of  2000  m  obtained  from  Table  14. 


2000m 

HEIGHT  OP  THE  BAROMETER  IN  INCHES. 

29.5 

29.0 

28.5 

28.0 

27.5 

27.0 

26.5 

26.0 

25.5 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

45 

1-57 

1-54 

.52 

•49 

.46 

1.44 

46 

1.60 

1.58 

•55 

•52 

.50 

1.47 

47 

1.64 

1.61 

•58 

•56 

•53 

1-50 

48 

1.68 

1.65 

.62 

•59 

.56 

1-53 

49 

1.71 

1.68 

•65 

.62 

.60 

1-57 

50 

i  75 

1.72 

.69 

.66 

•63 

1.60 

51 

1.78 

1-75 

•72 

.69 

.66 

1.63 

52 

1.82 

1-79 

.76 

•73 

.70 

1.67 

53 

1.86 

1.82 

•79 

.76 

•73 

1.70 

54 

1.89 

1.86 

.83 

.80 

.76 

1-73 

1.70 

55 

1.93 

1.90 

.86 

•83 

.80 

1.76 

1-73 

56 

1.96 

i-93 

.90 

.86 

.83 

1.80 

1.76 

57 

2.00 

1-97 

•93 

.90 

•87 

1.83 

1.80 

58 
59 

2.04 
2.07 

2.00 
2.04 

•97 

2.00 

•93 
•97 

.90 
•93 

1.86 
1.90 

1.83 
1.86 

60 

2.II 

2.07 

2.O4 

2.OO 

1-97 

i  93 

1.90 

61 

2.II 

2.07 

2.04 

2.OO 

i!96 

62 

2.15 

2.II 

2.07 

2.03 

2.OO 

1.96 

63 

2.18 

2.14 

2.II 

2.07 

2.O3 

1.99 

64 

2.22 

2.18 

2.14 

2.10 

2.06 

2.03 

65 

2.25 

2.21 

2.18 

2.14 

2.10 

2.06 

66 

2.29 

2.25 

2.21 

2.17 

2.13 

2.09 

67 

2-33 

2.29 

2.25 

2.21 

2.17 

2.13 

68 

2.36 

2.32 

2.28 

2.24 

2.20 

2.16 

69 

2.40 

2.36 

2.32 

2.27 

2.23 

2.19 

70 

2.43 

2-39 

2-35 

2.31 

2.27 

2.22 

71 

2.47 

2-43 

2.38 

2-34 

2.30 

2.26 

2.21 

72 

2.51 

2.46 

2.42 

2.38 

2.33 

2.29 

2.25 

73 

2-54 

2.50 

2-45 

2.41 

2-37 

2.32 

2.28 

74 

2-53 

2-49 

2-45 

2.40 

2.36 

2.31 

75 

76 

2-57 
2.61 

2-53 
2.56 

2.48 
2.51 

2.43 

2.47 

2-39 
2.42 

2-34 
2.38 

77 

2.64 

2.60 

2-55 

2.50 

2.46 

2.41 

78 

2.68 

2.63 

2.58 

2-54 

2.49 

2.44 

79 

2.71 

2.67 

2.62 

2.57 

2.52 

2.48 

80 

2-75 

2.70 

2.65 

2.60 

2.56 

2.51 

81 

2.79 

2.74 

2.69 

2.64 

2-59 

2-54 

82 

2.82 

2.77 

2.72 

2.67 

2.62 

2-57 

83 

2.86 

2.81 

2.76 

2.71 

2.66 

2.61 

84 

2.89 

2.84 

2.79 

2.74 

2.69 

2.64 

85 

2-93 

2.88 

2.83 

2.78 

2.72 

2.67 

86 

2.97 

2.91 

2.86 

2.81 

2.76 

2.71 

87 

3.00 

2-95 

2.90 

2.84 

2.79 

2-74 

88 
89 

3-04 
3.08 

2.99 
3-02 

2-93 
2.97 

2.88 
2.91 

2.83 
2.86 

2.77 
2.81 

2.72 
2-75 

90 

3-  ii 

3.06 

3.00 

2-95 

2.89 

2.84 

2.78 

SMITHSONIAN  TABLES. 


TABLE  16. 

REDUCTION  >OF  THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 

B0-B=B(10W-1). 

Top  argument :     Height  of  the  barometer  (B). 

Side  argument:    Values  of  2000  m  obtained  from  Table  14. 


2000  m. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

28.0 

27.5  j 

27.0 

26.5 

26.0 

25.5 

25.0 

24.5 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

90 

3.06    j 

3-00 

2-95 

2.89 

2.84 

2.78 

9i 

3.09    . 

3-04     , 

2.98 

2-93 

2.87 

2.82 

92 

3-13    ' 

3-07     ! 

3.02 

2.96 

2.91 

2.85 

93 

3-l6 

3-II 

3-05 

2.99 

2.94 

2.88 

94 

3.20 

3-14 

3-09 

3-03 

2.97 

2.91 

95 

3-24    ' 

3-l8 

3-12 

3-06 

3-01 

2-95 

96 

3-27 

3-21 

3-16 

3.10 

3.04 

2.98 

97 

3-31     , 

3.25 

3-19 

3.13 

3.07 

3.01 

98 

3-34 

3.28 

3.22 

3.17 

3-II 

3-05 

99 

3.38 

3-32 

3.26 

3-20 

3-14 

3.08 

100 

3-42 

3.36 

3.29 

3.23 

3-17 

3." 

101 

3-45 

3.39 

3-33 

3.27 

3-21 

3.14 

102 
103 

3-49 

3.43 
3-46 

3.36 
3-40 

3.30 
3.34 

3-24 
3.27 

3.18 
3.21 

104 

3-56 

3-50 

3-43 

3.37 

3-31 

3-24 

105 

3-60 

3-53 

3-47 

3.41 

3-34 

3.28 

3.2I 

106 

3-57 

3-50 

3.44 

3-37 

3-31 

107 

3-6i 

3-54 

3-47 

3-41 

3.34 

3-28 

108 

3-64 

3-57 

3-5i 

3-44 

3.38 

3.31 

109 

3-68 

3-6i 

3-54 

3.48 

3.41 

3-34 

no 

3-71 

3-65 

3-58 

3-51 

3-44 

3.38 

in 

3-75 

3-68 

3-6i 

3-54 

3.48 

3.41 

112 

3-78 

3.72 

3-65 

3.58 

3-51 

3-44 

U3 

3-82 

3-75 

3-68 

3-61 

3-54 

3-47 

114 

3-86 

3-79 

3-72 

3-65 

3.58 

3-51 

115 

3-89 

3-82 

3-75 

3-68 

3.6i 

3-54 

116 

3-93 

3-86 

3-79 

3-71 

3.64 

3.57 

117 

.3-97 

3.89 

3-82 

3-75 

3-68 

3.6o 

118 

4.00 

3-93 

3-86 

3.78 

3.7i 

3.64 

119 

4.04 

3.96 

3.89 

3-82 

3-74 

3.67 

120 

4.07 

4.00 

3-93 

3.85 

3.78 

3-70 

121 

4-  II 

4.04 

3.96 

3.89 

3-8i 

3-74 

122 

4.07 

4.00 

3-92 

3-85 

3-77 

3-69 

123 

4.11 

4-03 

3.96 

3-88 

3.80 

3-73 

124 

4.14 

4.07 

3-99 

3-91 

3.84 

3.76 

125 

4.18 

4.10 

4.02 

3.95 

3.87 

3-79 

126 

4.22 

4.14 

4.06 

3.98 

3-90 

3.82 

127 

4-25 

4.17 

4.09 

4.01 

3-94 

3-86 

128 

4.29 

4.21 

4.13 

4.05 

3-97 

3.89 

129 

4-32 

4.24 

4.16 

4.08 

4.00 

3.92 

130 

4.36 

4.28 

4.20 

4.12 

4.04 

3.96 

131 

4.40 

4.3i 

4-23 

4-15 

4.07 

3-99 

132 

4-43 

4.35 

4-27 

4.19 

4.10 

4.02 

133 

4-47 

4.38 

4.30 

4.22 

4.14 

4-05 

134 

4-50 

4-42 

4-34 

4.25 

4.17 

4.09 

135 

4-54 

4.46 

4-37 

4.29 

4.20 

4.12 

SMITHSONIAN  TABLES. 


72 


TABLE  16. 
REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 

Bo-B  =  B  (10W-D. 

Top  argument :     Height  of  the  barometer  (B). 
Side  argument :     Values  of  2000  m  obtained  from  Table  14. 


2000  m. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

26.5 

26.0 

25.5 

25.0 

24.5 

24.0 

23.5 

23.0 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

135 

4.46 

4-37 

4.29 

4.20 

4.12 

136 

4-49 

4-41 

4-32 

4.24 

4.15 

137 

4-53 

4.44 

4-36 

4-27 

4.19 

138 

4-56 

4.48 

4.39 

4-30 

4.22 

139 

4.60 

4-51 

4.43 

4-34 

4-25 

140 

4-63 

4-55 

4.46 

4-37 

4.28 

4.20 

141 

4.67 

4.58 

4.49 

4.41 

4.32 

4-23 

142 

4.71 

4.62 

4-53 

4-44 

4-35 

4.26 

143 

4-74 

4.65 

4-56 

4-47 

4.38 

4.30 

144 

4.78 

4.69 

4.60 

4-51 

4.42 

4-33 

145 

4.81 

4.72 

4-63 

4-54 

445 

4.36 

146 

4-85 

4.76 

4.67 

4-58 

4.48 

4-39 

147 

4.89 

4-79 

4.70 

4.61 

4.52 

4-43 

148 

4.92 

4.83 

4-74 

4.64 

4-55 

4.46 

149 

4.96 

4.87 

4-77 

4.68 

4-58 

4-49 

150 

5.00 

4.90 

4.81 

4.71 

4.62 

4-52 

151 

5-03 

4-94 

4-84 

4-75 

4-65 

4-56 

152 

5-07 

4-97 

4.88 

4.78 

4.69 

4-59 

153 

5.10 

5.01 

4.91 

4.82 

4.72 

4.62 

154 

5-04 

4-95 

4.85 

4-75 

4.66 

155 

5.08 

4.98 

4.88 

4-79 

4.69 

156 

5-12 

5.02 

4.92 

4.82 

4.72 

3 

5.15 
5-19 

5-05 
5-09 

4-95 
4-99 

4-85 
4.89 

4-75 
4-79 

i59 

5-22 

5-12 

5-02 

4.92 

4.82 

4.72 

160 

5-26 

5.16 

5-06 

4.96 

4-85 

4-75 

161 

5.29 

5.19 

5-09 

4-99 

4.89 

4-79 

162 

5-33 

5-23 

5.13 

5-02 

4,92 

4.82 

163 

5-37 

5-26 

5.16 

5-06 

4-95 

4-85 

164 

5-40 

5-30 

5.20 

5-09 

4.99 

4.88 

165 

166 

5-44 
5.48 

5-33 
5-37 

5-23 
5-26 

5.13 
5-16 

5-02 
5-05 

4.92 
4-95 

167 

5.5i 

5-41 

5.30 

5-19 

5-09 

4.98 

1  68 
169 

5-55 
5.58 

5-44 
5.48 

5-33 
5-37 

5-23 
5-26 

5-12 
5-15 

5-01 
5-05 

170 

5-62 

5-51 

5-40 

5-30 

5.19 

5.o8 

171 

5-55 

5-44 

5-33 

5.22 

5-ii 

172 

5.58 

5-47 

5-37 

5-26 

5-15 

173 

5-62 

5-5i 

5-40 

5-29 

5-i8 

174 

5-66 

5-54 

5-43 

5-32 

5-21 

175 

5-69 

5.58 

5-47 

5.36 

5-25 

176 

5-73 

5-62 

5.50 

5-39 

5.28 

177 

5.76 

5-65 

5-54 

5-42 

5.3i 

5-20 

178 
179 

5-8o 
5.84 

5-69 
5-72 

5-57 
5-6i 

5-46 
5-49 

5-34 
5.38 

5-23 
5.26 

180 

5.87 

5.76 

5-64 

5-53 

541 

5-30 

SMITHSONIAN  TABLES. 


73 


TABLE  16. 


REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 

Bo-B  =  B  (10W-1). 

Top  argument:     Height  of  the  barometer  (B). 
Side  argument:     Values  of  2000  m  obtained  from  Table  14. 


2000  m. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

25.5 

25.0 

24.5 

24.0 

23.5 

23.0 

22.5 

22.0 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

ISO 

5.87 

5-76 

5.64 

5.53 

5-41 

5-30 

181 

5.91 

5-79 

5-68 

5.56 

5-44 

5.33 

182 

5-94 

5.83 

5-7i 

5-59 

5.48 

5.36 

183 

5.98 

5-86 

5-75 

5.63 

5.51 

5-39 

184 

6.02 

5.90 

5-78 

5.66 

5-54 

5-43 

185 

5-93 

5-82 

5.70 

5.58 

546 

186 

5-97 

5.85 

5-73 

5-61 

5-49 

187 

6.01 

5-89 

5-77 

5.65 

5.53 

188 

6.04 

5.92 

5.8o 

5.68 

5.56 

189 

6.08 

5.96 

5.83 

5-71 

5-59 

190 

6.ii 

5-99 

5-87 

5-75 

5.62 

191 
192 

6.15 
6.18 

6.03 
6.06 

5-90 
5-94 

5-78 
5-8i 

5-66 
5.69 

193 

6.22 

6.10 

5-97 

5-85 

5.72 

194 

6.26 

6.13 

6.01 

5-88 

5.76 

195 

6.29 

6.17 

6.04 

5-91 

5-79 

196 

6.33 

6.  20 

6.08 

5-95 

5-82 

5.70 

197 

6.36 

6.24 

6.ii 

5.98 

5.86 

5-73 

198 

6.40 

6.27 

6.14 

6.  02 

5.89 

5-76 

199 

6.44 

6-31 

6.18 

6.05 

5-92 

5.79 

200 

6.47 

6.34 

6.21 

6.08 

5.96 

5.83 

201 

6.51 

6.38 

6.25 

6.12 

5-99 

5-86 

202 

6.55 

6.41 

6.28 

6.15 

6.02 

5.89 

203 

6.58 

6.45 

6.32 

6.19 

6.06 

5-92 

204 

6.62 

6.49 

6.35 

6.22 

6.09 

5.96 

205 

6.52 

6-39 

6.26 

6.12 

5-99 

206 

6.56 

6.42 

6.29 

6.16 

6.02 

207 

6.59 

6.46 

6.32 

6.19 

6.06 

208     , 

'» 

6.63 

6.49 

6.36 

6.22 

6.09 

209 

6.66 

6.53 

6-39 

6.26 

6.12 

210 

6.70 

6.56 

6-43 

6.29 

6.15 

211 

6.74 

6.60 

6.46 

6.32 

6.19 

212 

6.77 

6.63 

6.50 

6.36 

6.22 

213 

6.81 

6.67 

6.53 

6.39 

6.25 

214 

6.84 

6.71 

6.57 

6.43 

6.29 

215 

6.88 

6.74 

6.60 

6.46 

6.32 

216 

6.92 

6.78 

6.63 

6.49 

6-35 

6.21 

217 

6-95 

6.81 

6.67 

6-53 

6.39 

6.24 

218 

6.99 

6.85 

6.70 

6.56 

6.42 

6.28 

219 

7.03 

6.88 

6.74 

6.60 

6-45 

6.31 

220 

6.92 

6.77 

6.63 

6-49 

6-34 

221 

6-95 

6.81 

6.66 

6.52 

6.37 

222 

6.99 

6.84 

6.70 

6.55 

6.41 

223 

7.02 

6.88 

6-73 

6.59 

6.44 

224 

7.06 

6.91 

6.77 

6.62 

6.47 

225 

7.10 

6-95 

6.80 

6.65 

6.51 

SMITHSONIAN  TABLES. 


74 


TABLE  16. 
REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL, 

ENGLISH    MEASURES. 

Top  argument:     Height  of  the  barometer  (B). 

Side  argument :     Values  of  2000  m  obtained  from  Table  14. 


2000  m. 

HEIGHT  OF  THE  BAROMETER   IN  INCHES. 

24.0 

23.5 

23.0 

22.5 

22.0 

21.5 

21.0 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

225 

7.10 

6-95 

6.80 

6.65 

6.51 

226 

7-13 

6.98 

6.84 

6.69 

6-54 

227 

7.17 

7.O2 

6.87 

6.72 

6-57 

228 

7.20 

7-05 

6.90 

6-75 

6.60 

229 

7.24 

7.09 

6.94 

6.79 

6.64 

230 

7-28 

7.12 

6.97 

6.82 

6.67 

231 

7-31 

7.16 

7.01 

6.86 

6.70 

232 

7-35 

7.20 

7.04 

6.89 

6.74 

233 

7.38 

7.23 

7.08 

6.92 

6-77 

234 

7.42 

7.27 

7.II 

6.96 

6.80 

235 

7.46 

7.30 

7.15 

6.99 

6.84 

6.68 

236 

7-49 

7.34 

7-l8 

7.02 

6.87 

6.71 

237 

7-53 

7.37 

7.22 

7.06 

6.90 

6.74 

238 

7.41 

7-25 

7.09 

6-93 

6.78 

239 

7.44 

7.29 

7.13 

6.97 

6.81 

240 

7.48 

7-32 

7.16 

7.00 

6.84 

241 

7.51 

7-35 

7.19 

7.04 

6.88 

242 

7-55 

7-39 

7-23 

7.07 

6.91 

243 

7-59 

7.42 

7.26 

7.10 

6-94 

244 

7.62 

7.46 

7.30 

7.14 

6-97 

245 

7.66 

7-49 

7-33 

7.17 

7.01 

246 

7.69 

7-53 

7-37 

7.20 

7.04 

247 

7-73 

7-57 

7.40 

7.24 

7.07 

248 

7-77 

7.60 

7-44 

7.27 

7.10 

249 

7.80 

7.64 

7-47 

7.30 

7.14 

250 

7.84 

7.67 

7-50 

7-34 

7.17 

251 

7-87 

7.71 

7-54 

7-37 

7.20 

252 

7.91 

7-74 

7-57 

7.41 

7-24 

253 

7-95 

7.78 

7.61 

7-44 

7.27 

254 

7.98 

7.8! 

7.64 

7-47 

7-30 

255 

8.02 

7.85 

7.68 

7.5i 

7-34 

256 

8.05 

7.88 

7.71 

7-54 

7-37 

7.20 

257 

8.09 

7.92 

7-75 

7-57 

7.40 

7-23 

258 

8.13 

7-95 

7.78 

7.61 

7-44 

7.26 

259 

8.16 

7-99 

7.82 

7.64 

7-47 

7.30 

260 

261 

8.03 
8.06 

7.85 
7-89 

7.68 
7.71 

7-50 

7-54 

7-33 
7.36 

262 

8.10 

7-92 

7-75 

7-57 

7-39 

263 

264 

8.13 
8.17 

7.96 
7-99 

7.78 
7.81 

7.60 
7.64 

7-43 
7.46 

265 

266 

8.21 

8.24 

8.03 
8.06 

7.85 
7.88 

7-67 
7.70 

7-49 
7.52 

267 

8.28 

8.10 

7.92 

7-74 

7.56 

268 

8.31 

8.13 

7-95 

7-77 

7-59 

269 

8.35 

8.17 

7-99 

7.80 

7.62 

270 

8-39 

8.20 

8.02 

7.84 

7.66 

SMITHSONIAN  TABLES. 


75 


TABLE  16. 

REDUCTION    OF  THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 
Bo-B  =  B  (10W-1). 

Top  argument:     Height  of  the  barometer  (B). 

Side  argument :     Values  of  2000  w  obtained   from  Table  14. 


2000  m. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

23.0 

22.5 

22.0 

21.5 

21.0 

20.5 

20.0 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

270 

8-39 

8.20 

8.02 

7.84 

7.66 

271 

8.42 

8.24 

8.06 

7.87 

7.69 

272 

8.46 

8.27 

8.09 

7.91 

7.72 

273 

8.49 

8.31 

8.12 

7-94 

7.76 

274 

8.53 

8.34 

8.16 

7-97 

7-79 

275 

8.57 

8.38 

8.19 

8.01 

7.82 

276 

8.60 

8.42 

8.23 

8.04 

7-85 

277 

8.45 

8.26 

8.08 

7.89 

7-70 

278 

8.49 

8.30 

8.ii 

7.92 

7-73 

279 

8.52 

8.33 

8.14 

7.95 

7-77 

280 

8.56 

8.37 

8.18 

7-99 

7.80 

281 

8.59 

8.40 

8.21 

8.02 

7-83 

282 

8.63 

8.44 

8.25 

8.05 

7.86 

283 

8.67 

8.47 

8.28 

8.09 

7.90 

284 

8.70 

8.51 

8.32 

8.12 

7-93 

285 

8-74 

8-54 

8.35 

8.16 

7.96 

286 

8.77 

8.58 

8.38 

8.19 

7-99 

287 

8.81 

8.61 

8.42 

8.22 

8.03 

288 

8.85 

8.65 

8.45 

8.26 

8.06 

289 

8.88 

8.68 

8-49 

8.29 

8.09 

290 

8.92 

8.72 

8.52 

8.32 

8.13 

291 

8.95 

8.76 

8.56 

8.36 

8.16 

292 

8.99 

8.79 

8-59 

8.39 

8.19 

293 

9-°3 

8.83 

8.63 

8.43 

8.22 

294 

9.06 

8.86 

8.66 

8.46 

8.26 

295 

9.10 

8.90 

8.70 

8.49 

8.29 

8.09 

296 

9.14 

8.93 

8.73 

8.53 

8.32 

8.12 

297 

8.97 

8.76 

8.56 

8.36 

8.15 

298 

9.00 

8.80 

8.60 

8-39 

8.19 

299 

9.04 

8.83 

8.63 

8.42 

8.22 

300 

9.08 

8.87 

8.66 

8.46 

8.25 

301 

9.11 

8.90 

8.70 

8.49 

8.28 

302 

9,15 

8.94 

8-73 

8.52 

8.32 

303 

9.18 

8.97 

8.77 

8.56 

8-35 

3°4 

9.22 

9.01 

8.80 

8.59 

8.38 

305 

9.26 

9.04 

8.83 

8.62 

8.41 

306 

9.29 

9.08 

8.87 

8.66 

8.45 

307 

9-33 

9.12 

8.90 

8.69 

8.48 

308 

9'36 

9-15 

8.94 

8.72 

8.51 

309 

9.40 

9.19 

8.97 

8.76 

8-54 

310 

9-44 

9.22 

9.01 

8.79 

8.58 

3ii 
312 

9-47 
9-5i 

9.26 
9.29 

9.04 
9.08 

8.83 
8.86 

8.61 
8.64 

313 

9-54 

9-33 

9.11 

8.89 

8.68 

314 

9.58 

9.36 

9-15 

8-93 

8.71 

315 

9.62 

9.40 

9.18 

8.96 

8.74 

SMITHSONIAN  TABLES. 


76 


TABLE  16. 
REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 

Bo-B  =  B  (10™-1). 

Top   argument :     Height  of  the  barometer  (B). 
Side  argument:     Values  of  2000  m  obtained  from  Table  14. 


2000  m. 

HEIGHT  OF  THE  BAROMETER   IN  INCHES. 

22.0 

21.5 

21.0 

2O.5 

20.0 

19.5 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

3I5 

9.62 

9.40 

9.18 

8.96 

8.74 

8.52 

3i6 

9-65 

9-43 

9.21 

9.00 

8.78 

8.56 

317 
3i8 
319 

9.69 
9.76 

9-47 
9-5i 
9-54 

9-25 
9.28 

9-32 

9-°3 
9.06 
9.10 

8.81 

8.84 
8.88 

as 

8.65 

320 

9.80 

9-58 

9-35 

9.13 

8.91 

8.69 

321 

9.61 

9-39 

9.17 

8.94 

8.72 

322 

9-65 

9.42 

9.20 

8.98 

8.75 

323 

9.68 

9.46 

9-23 

9.01 

8.78 

324 

9.72 

9-49 

9.27 

9.04 

8.82 

325 

9.76 

9-53 

9-30 

9.08 

8.85 

326 

9-79 

9-56 

9-34 

9.11 

8.88 

327 

9-83 

9.60 

9-37 

9.14 

8.91 

328 

9.86 

9.64 

9.41 

9.18 

8.95 

329 

9.90 

9.67 

9-44 

9.21 

8.98 

330 

9-94 

9.71 

9-47 

9.24 

9.01 

33i 

9-97 

9-74 

9-5i 

9.28 

9-°5 

332 

10.01 

9.78 

9-54 

9-3i 

9.08 

333 

10.05 

9.81 

9.58 

9.34 

9.11 

334 

9.85 

9.61 

9-38 

9.14 

SMITHSONIAN  TABLES. 


77 


TABLE  17. 

REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 

Z  (i—B) 


Values  of  2000  X  m. 


Altitude  in 
metres. 

Z. 

MEAN  TEMPERATURE  OE  AIR  COLUMN   IN   CENTIGRADE  DEGREES   (0). 

-16° 

-12° 

-8° 

—  4° 

-2° 

0° 

+  2° 

+  4° 

+  6° 

+  8° 

+  10° 

10 

1.2 

i.i 

i.i 

i.i 

i.i 

i.i 

i.i 

i.i 

i.i 

I.O 

I.O 

20 

2-3 

2-3 

2.2 

2.2 

2.2 

2.2 

2.1 

2.1 

2.1 

2.1 

2.1 

30 

3-5 

3-4 

3-3 

3-3 

3-3 

3-2 

3-2 

3-2 

3-2 

3-i 

3-1 

40 

4.6 

4-5 

4-5 

4-4 

4.4 

4-3 

4.3 

4-3 

4.2 

4.2 

4.2 

50 

5-8 

5-7 

5-6 

5-5 

5-5 

54 

5-4 

5-3 

5-3 

5-2 

5-2 

60 

6.9 

6.8 

6.7 

6.6 

6-5 

6.5 

6.4 

6.4 

6-3 

6-3 

6.2 

70 

8.1 

7-9 

7-8 

7-7 

7-6 

7.6 

7.5 

7-5 

7-4 

7-3 

7.3 

80 

9.2 

9-i 

8-9 

8.8 

8.7 

8.7 

8.6 

8-5 

8.5 

8.4 

8.3 

90 

10.4 

10.2 

10.  0 

9.9 

9.8 

9-7 

9-7 

9-6 

9.5 

9-4 

9-4 

100 

n-5 

ii-3 

II.  2 

II.  0 

10.9 

10.8 

10.7 

10.7 

10.6 

10.5 

10.4 

110 

12.7 

12.5 

12.3 

12.  1 

12.0 

11.9 

n.8 

"*7 

n.  6 

H.5 

11.4 

120 

13-8 

13-6 

13-4 

13.2 

I3.I 

13.0 

12.9 

12.8 

12.7 

12.6 

12.5 

I30 

15.0 

14.7 

14-5 

14.3 

14.2 

14.1 

14.0 

13.9 

13.7 

13.6 

13.5 

140 

16.1 

15-9 

15.6 

15-4 

15.3 

15-1 

15.0 

14.9 

14.8 

14.7 

14.6 

ISO 

17-3 

17.0 

16.7 

16-5 

16.4 

16.2 

16.1 

16.0 

15.9 

15.7 

15-6 

160 

18.4 

18.1 

I7.8 

17-6 

17.4 

17.3 

17.2 

17.0 

16.9 

16.8 

16.7 

170 

19.6 

19-3 

19.0 

I8.7 

I8.5 

18.4 

18.3 

18.1 

18.0 

17.8 

17.7 

1  80 

20.7 

20.4 

20.1 

19.8 

19.6 

!9.5 

19.3 

19.2 

19.0 

18.9 

18.7 

190 

21.9 

21.5 

21.2 

20.9 

20.7 

20.6 

20.4 

20.  2 

20.1 

19.9 

19.8 

200 

23.0 

22.7 

22.3 

22.0 

21.8 

21.6 

21.5 

21.3 

21.  1 

21.0 

20.8 

210 

24.2 

23.8 

23-4 

23.1 

22.9 

22.7 

22.6 

22-4 

22.2 

22.  0 

21.9 

220 

25-3 

24.9 

24-5 

24.2 

24.0 

23.8 

23.6 

23-4 

23-3 

23.1 

22.9 

230 

26.5 

26.1 

25-7 

25-3 

25.1 

24.9 

24.7 

24-5 

24.3 

24.1 

23.9 

240 

27.6 

27.2 

26.8 

26.4 

26.2 

26.0 

25.8 

25.6 

25-4 

25.2 

25.0 

250 

28.8 

28.3 

27.9 

27.5 

27.3 

27.0 

26.8 

26.6 

26.4 

26.2 

26.0 

260 

29.9 

29-5 

29.0 

28.6 

28.3 

28.1 

27-9 

27-7 

27.5 

27.3 

27.1 

270 

3I-I 

30.6 

3O.I 

29.7 

29.4 

29.2 

29.0 

28.8 

28.5 

28.3 

28.1 

280 

32.2 

3i-7 

31.2 

30.8 

30.5 

30.3 

30.1 

29.8 

29.6 

294 

29.1 

290 

33-4 

32-9 

32.4 

3L9 

31.6 

31.4 

3LI 

30.9 

30.7 

30.4 

30.2 

300 

34-5 

34-  ° 

33-5 

33-0 

32.7 

32.5 

32.2 

32.0 

3L7 

31-5 

31.2 

310 

35-7 

35-  1 

34-6 

34-1 

33-8 

33.5 

33-3 

33-° 

32.8 

32.5 

32.3 

320 

36.8 

36.3 

35-7 

35-2 

34-9 

34.6 

34-4 

34-1 

33-8 

33-6 

33.3 

330 

38.0 

374 

36.8 

36.3 

36.0 

35.7 

35-4 

35-2 

34-9 

34-6 

34.3 

340 

39-1 

38.5 

37-9 

37.4 

37.i 

36.8 

36.5 

36-2 

35-9 

35-7 

35.4 

350 

40.3 

39-7 

39-  o 

38.5 

38.2 

37.9 

37.6 

37-3 

37-0 

36.7 

36.4 

360 

41.4 

40.8 

40.2 

39-5 

39.2 

38.9 

38.6 

38.4 

38.1 

37.8 

37.5 

370 

42.6 

41.9 

4i.3 

40.6 

40.3 

40.0 

39>7 

39-4 

39-1 

38-8 

38.5 

380 

43-7 

43-i 

42.4 

41.7 

41.4 

41.1 

40.8 

40.5 

40.2 

39-9 

39.6 

39° 

44-9 

44.2 

43-5 

42.8 

42.5 

42.2 

41.9 

4L5 

41.2 

40.9 

40.6 

400 

46.0 

45-3 

44.6 

43.9 

43-6 

43.3 

42.9 

42.6 

42.3 

42.0 

41.6 

410 

47.2 

46.4 

45-7 

45-0 

44-7 

44.4 

44.0 

43-7 

43.3 

43-o 

42.7 

420 

48.3 

47.6 

46.9 

46.1 

45-8 

45.4 

45-i 

44-7 

44.4 

44.1 

43.7 

430 

49-5 

48.7 

48.0 

47-2 

46.9 

46.5 

46.2 

45-8 

45-5 

45.1 

44-8 

440 

50.6 

49.8 

49.1 

48.3 

48.0 

47.6 

47-2 

46.9 

46.5 

46.2 

45-8 

.    450 

51-8 

51.0 

50.2 

49.4 

49.1 

48.7 

48.3 

47-9 

47-6 

47.2 

46.8 

460 

52.9 

52.1 

51-3 

50.5 

50.1 

49-8 

49.4 

49.0 

48.6 

48.2 

47-9 

470 

54-1 

53-2 

52.4 

51.6 

51-2 

50.8 

50.5 

50.1 

49-7 

49-3 

48.9 

480 

55-2 

54-4 

53-5 

52.7 

52.3 

51-9 

51-5 

5I.I 

50-7 

50.3 

50.0 

490 

5^.4 

55-5 

54-7 

53-8 

53.4 

53.o 

52.6 

52.2 

51-8 

51-4 

51.0 

500 

57-5 

56.6 

55-8 

54-9 

54.5 

54-1 

53-7 

53-3 

52-9 

52.4 

52-0 

SMITHSONIAN  TABLES. 


78 


TABLE  17, 
REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 

Z  (i—6) 


Values  of  2000  X  m. 


18444+67.536+ .oo3Z 


Altitude  in 
metres. 

Z. 

MEAN  TEMPERATURE  OF  AIR  COLUMN  IN  CENTIGRADE  DEGREES  (0}. 

+  12° 

+  14° 

+  16° 

+  18° 

+  20° 

+  22° 

+  24° 

+  26° 

+  28° 

+  32° 

+  36° 

10 

I.O 

I.O 

I.O 

I.O 

I.O 

I.O 

I.O 

I.O 

I.O 

I.O 

0.9 

20 

2.1 

2.1 

2.0 

2.0 

2.0 

2.0 

2.O 

2.0 

i-9 

i-9 

1.9 

30 

3-i 

3-i 

3-i 

3.0 

3-0 

3-0 

3-0 

2.9 

2.9 

2.9 

2.8 

40 

4.1 

4.1 

4.1 

4.0 

4.0 

4.0 

3-9 

3-9 

3-9 

3-8 

3-8 

50 

5-2 

5-i 

5.1 

5-0 

5.0 

5-0 

4-9 

4-9 

4-9 

4.8 

4.7 

60 

6.2 

6.2 

6.1 

6.1 

6.0 

6.0 

5-9 

5.9 

5-8 

5.8 

5-7 

70 

7-2 

7.2 

7-1 

7-1 

7.0 

7.0 

6.9 

6-9 

6.8 

6.7 

6.6 

80 

8.3 

8.2 

8.1 

8.1 

8.0 

8.0 

7.9 

7.8 

7-8 

7-7 

7.6 

90 

9-3 

9.2 

9.2 

9.1 

9.0 

9.0 

8-9 

8.8 

8.8 

8.6 

8.5 

IOO 

10.3 

10.3 

10.2 

10.  1 

10.  0 

9-9 

9-9 

9.8 

9-7 

9-6 

9-5 

MO 

11.4 

«.3 

II.  2 

ii.  i 

II.  0 

10.9 

10.9 

10.8 

10.7 

10.5 

10.4 

120 

12.4 

12.3 

12.2 

12.  1 

12.0 

11.9 

n.  8 

n.8 

11.7 

"•5 

H.3 

130 

13-4 

13-3 

13-2 

I3.I 

13.0 

12.9 

12.8 

12.7 

12.7 

12.5 

12.3 

140 

14-5 

14-3 

14.2 

I4.I 

14.0 

13.9 

13-8 

13.7 

13.6 

134 

13-2 

150 

15-5 

15-4 

15-3 

I5.I 

15.0 

14.9 

14.8 

14.7 

14.6 

14.4 

14.2 

160 

16.5 

16.4 

16.3 

16.2 

16.0 

!5-9 

15.8 

15.7 

15-6 

J5.3 

15.1 

170 

17.6 

17.4 

17-3 

17.2 

17.0 

16.9 

16.8 

16.7 

16.5 

16.3 

16.1 

1  80 

18.6 

18.4 

18-3 

18.2 

18.0 

17.9 

17.8 

17.6 

17-5 

17.3 

17.0 

190 

19.6 

19-5 

19-3 

19.2 

19.0 

18.9 

18.8 

18.6 

18.5 

18.2 

1  8.0 

200 

20.7 

20.5 

20.3 

20.  2 

20.0 

19.9 

19.7 

19.6 

19-5 

19.2 

18.9 

210 

21.7 

21.5 

21.4 

21.2 

21.0 

20.9 

20.7 

20.  6 

20.4 

20.1 

19.8 

220 

22.7 

22.5 

22.4 

22.2 

22.  0 

21.9 

21.7 

21.6 

21.4 

21.  1 

20.8 

230 

23-8 

23.6 

23.4 

23.2 

23.0 

22.9 

22.7 

22.5 

22.4 

22.0 

21.7 

240 

24.8 

24.6 

24.4 

24.2 

24.0 

23-9 

23-7 

23.5 

23-3 

23.0 

22.7 

250 

25-8 

25-6 

25.4 

25-2 

25.0 

24.9 

24.7 

24.5 

24.3 

24.0 

23-6 

260 

26.9 

26.6 

26.4 

26.2 

26.1 

25.9 

25-7 

25-5 

25.3 

24.9 

24.6 

270 

27.9 

27.7 

27.5 

27-3 

27.1 

26.9 

26.7 

26.5 

26.3 

25-9 

25-5 

280 

28.9 

28.7 

28.5 

28.3 

28.1 

27.8 

27.6 

27.4 

27.2 

26.8 

26.5 

290 

29.0 

29.7 

29.5 

29.3 

29.1 

28.8 

28.6 

28.4 

28.2 

27.8 

27.4 

300 

31.0 

30.7 

3°-5 

30-3 

30.1 

29.8 

29.6 

29.4 

29.2 

28.8 

28.4 

310 

32.0 

31-8 

3i-5 

31-3 

3I.I 

30.8 

30.6 

30.4 

30.2 

29.7 

29.3 

320 

33-1 

32-8 

32.6 

32.3 

32.1 

31.8 

31-6 

31.4 

31-1 

30.7 

30.3 

330 

34-1 

33-8 

33-6 

33-3 

33-1 

32.8 

32.6 

32.3 

32-1 

31-6 

31.2 

340 

35-1 

34-8 

34-6 

34.3 

34-1 

33-8 

33-6 

33-3 

33-1 

32.6 

32.1 

350 

36.2 

35-9 

35-6 

35-3 

35-1 

34-8 

34-6 

34-3 

34-0 

33-5 

33-i 

360 

37-2 

36.9 

36.6 

36.3 

36.1 

35-8 

35-5 

35-3 

35-0 

34-5 

34.o 

370 

38-2 

37-9 

37-6 

37-4 

37-1 

36.8 

36.5 

36.3 

36.0 

35.5 

35-0 

380 

39-2 

38.9 

38.7 

38.4 

38.1 

37-8 

37.5 

37-2 

37.o 

36.4 

35.9 

390 

40-3 

40.0 

39-7 

39-4 

39-1 

38.8 

38.5 

38.2 

37-9 

37-4 

36.9 

400 

4i-3 

41.0 

40.7 

40.4 

40.1 

39-8 

39-5 

39-2 

38.9 

38.3 

37.8 

410 

42.3 

42.0 

41.7 

41.4 

41.1 

40.8 

40-5 

40.2 

39-9 

39-3 

38.7 

420 

43-4 

43-o 

42.7 

42.4 

42.1 

41.8 

41-5 

41.2 

40.8 

40.3 

39-7 

430 

44.4 

44.1 

43-7 

43-4 

43-1 

42.8 

42.4 

42.1 

41.8 

41.2 

40.6 

440 

45-4 

45-1 

44-8 

44-4 

44.1 

43.8 

43.4 

43-i 

42.8 

42.2 

41.6 

450 

46.5 

46.1 

45-8 

454 

45-1 

44.8 

44.4 

44-1 

43-8 

43-1 

42.5 

460 

47-5 

47.1 

46.8 

46.4 

46.1 

45-7 

45-4 

45.1 

44-7 

44.1 

43-5 

470 

48.5 

48.2 

47-8 

47-4 

47.1 

46.7 

46.4 

46.1 

45-7 

45-o 

44-4 

480 

49.6 

49-2 

48.8 

48.5 

48.1 

47-7 

47-4 

47.0 

46.7 

46.0 

45-4 

49° 

50.6 

50.2 

49-8 

49.5 

49.1 

48.7 

48.4 

48.0 

47-6 

47.0 

46.3 

500 

51-6 

51-2 

50.9 

50.5 

50.1 

49-7 

49.4 

49.0 

48.6 

47-9 

47-2 

SMITHSONIAN  TABLES. 


79 


TABLE  17. 

REDUCTION    OF  THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 


Values  of  2000  X  m. 


Z  (I-/B) 


Altitude 
in 
metres. 
Z. 

MEAN  TEMPERATURE  OF  AIR  COLUMN  IN  CENTIGRADE  DEGREES   (0). 

-16° 

-12° 

—  8° 

-4° 

-2° 

0° 

+  2° 

-^4° 

+  6° 

+  8° 

+  10° 

500 

57-5 

56.6 

55-8 

54-9 

54-5 

54-1 

53-7 

53.3 

52.9 

524 

52.0 

5io 

58.7 

57-8 

56.9 

56.0 

55-6 

55-2 

54.8 

54-3 

53-9 

53-5 

53.1 

520 

59-8 

58.9 

58.0 

57-1 

56.7 

56.3 

55-8 

554 

55-0 

54-5 

54.1 

53° 

61.0 

60.0 

59-1 

58.2 

57-8 

57-3 

56.9 

56.5 

56.0 

55-6 

55-2 

540 

62.1 

61.2 

60.2 

59-3 

58.9 

584 

58.0 

57-5 

57.1 

56.6 

56.2 

550 

63.3 

62.3 

61.4 

60.4 

60.0 

59-5 

59-0 

58.6 

58.1 

57-7 

57.2 

560 

64.4 

634 

62.5 

61.5 

61.1 

60.6 

60.  i 

59.7 

59-2 

58.7 

58.3 

570 

65.6 

64.6 

63.6 

62.6 

62.1 

61.7 

61.2 

60.7 

60.3 

59-8 

59-3 

580 

66.7 

65.7 

64.7 

63-7 

63.2 

62.7 

62.3 

61.8 

61.3 

60.8 

60.4 

590 

67.9 

66.8 

65.8 

64.8 

64.3 

63.8 

63-3 

62.9 

62.4 

61.9 

61.4 

600 

69.0 

68.0 

66.9 

65.9 

654 

64.9 

64.4 

63.9 

634 

62.9 

62.4 

610 

70.2 

69.1 

68.0 

67.0 

66.5 

66.0 

65.5 

65.0 

64-5 

64.0 

63.5 

620 

71.4 

70.2 

69.2 

68.1 

67.6 

67.1 

66.6 

66.0 

65.5 

65.0 

64.5 

630 

72.5 

71.4 

70.3 

69.2 

68.7 

68.2 

67.6 

67.1 

66.6 

66.1 

65.6 

640 

73-7 

72.5 

71.4 

70.3 

69.8 

69.2 

68.7 

68.2 

677 

67.1 

66.6 

650 

74-8 

73-6 

72.5 

71.4 

70.9 

70.3 

69.8 

69.2 

68.7 

68.2 

67.6 

660 

76.0 

74-8 

73-6 

72.5 

72.0 

71.4 

70.9 

70.3 

69.8 

69.2 

68.7 

670 

77.1 

75-9 

74.7 

73-6 

73-0 

72.5 

71.9 

714 

70.8 

70.3 

69.7 

680 

78.3 

77-0 

75-9 

74-7 

74.1 

73-6 

73-o 

724 

71.9 

7L3 

70.8 

690 

794 

78.2 

77.0 

75-8 

75-2 

74.6 

74.1 

73-5 

72.9 

724 

71.8 

700 

80.6 

79.3 

78.! 

76.9 

76.3 

75-7 

75-1 

74.6 

74.0 

734 

72.9 

710 

81.7 

80.4 

79.2 

78.0 

774 

76.8 

76.2 

75-6 

75.1 

74-5 

73-9 

720 

82.9 

81.6 

80.3 

79.1 

78.5 

77-9 

77-3 

76.7 

76.1 

75.5 

74-9 

73° 

83.0 

82.7 

81.4 

80.2 

79.6 

79-o 

78.4 

77-8 

77-2 

76.6 

76.0 

740 

85.2 

83.8 

82.5 

81.3 

80.7 

80.1 

794 

78.8 

78.2 

77.6 

77.0 

750 

86.3 

85.0 

837 

82.4 

81.8 

81.1 

80.5 

79-9 

79-3 

78.7 

78.1 

760 

87-5 

86.1 

84.8 

83-5 

82.9 

82.2 

81.6 

81.0 

80.3 

79-7 

79.1 

770 

88.6 

87.2 

85-9 

84.6 

83-9 

83.3 

82.7 

82.0 

81.4 

80.8 

80.  i 

780 

89.8 

88.4 

87.0 

857 

85.0 

84.4 

83.7 

83.1 

82.5 

81.8 

81.2 

790 

90.9 

89.5 

88.1 

86.8 

86.1 

85.5 

84.8 

84.2 

83.5 

82.9 

82.2 

800 

92.1 

90.6 

89.2 

87.9 

87.2 

86.5 

85.9 

85.2 

84.6 

83.9 

83.3 

810 

93-2 

91.8 

90.4 

89.0 

88.3 

87.6 

87.0 

86.3 

85.6 

85-0 

84-3 

820 

944 

92.9 

9L5 

90.1 

894 

88.7 

88.0 

87.4 

86.7 

86.0 

85.3 

830 

95-5 

94.0 

92.6 

91.2 

90.5 

89.8 

89.1 

88.4 

87.7 

87.1 

86.4 

840 

96.7 

95.2 

93-7 

92.3 

91.6 

90.9 

90.2 

89.5 

88.8 

88.1 

874 

850 

97-8 

96.3 

94.8 

934 

92.7 

92.0 

91.2 

90.5 

89.8 

89.2 

88.5 

860 

99.0 

974 

95-9 

94.5 

93-8 

93-0 

92-3 

91.6 

90.9 

90.2 

89-5 

870 

IOO.I 

98.6 

97.o 

95-6 

94-8 

94.1 

934 

92.7 

92.0 

9L3 

90.5 

880 

101.3 

99-7 

98.2 

96.7 

95-9 

95-2 

94-5 

93-7 

93-o 

92.3 

91.6 

890 

102.4 

100.8 

99-3 

97.8 

97.0 

96.3 

95.5 

94.8 

94.1 

93-3 

92.6 

900 

103.6 

IO2.O 

100.4 

98.9 

98.1 

974 

96.6 

95.9 

95-1 

944 

93-7 

910 

104.7 

I03.I 

101.5 

IOO.O 

99-2 

984 

97-7 

96.9 

96.2 

954 

94-7 

920 

105.9 

104.2 

102.6 

IOI.I 

100.3 

99-5 

98.8 

98.0 

97.2 

96-5 

95-7 

930 

107.0 

1054 

103.7 

102.2 

101.4 

100.6 

99-8 

99.1 

98.3 

97-5 

96.8 

940 

108.2 

106.5 

104.9 

103.3 

102.5 

101.7 

100.9 

IOO.I 

994 

98.6 

97-8 

950 

109.3 

107.6 

106.0 

1044 

103.6 

102.8 

102.0 

IOI.2 

100.4 

99-6 

98.9 

960 

110.5 

108.8 

107.1 

105-5 

104.7 

103.9 

I03.I 

102.3 

101.5 

100.7 

99-9 

970 

ni.6 

109.9 

108.2 

106.6 

105.7 

104.9 

I04.I 

103.3 

102.5 

101.7 

100.9 

980 

1  12.8 

1  1  1.0 

109.3 

107.6 

106.8 

106.0 

105.2 

1044 

103.6 

102.8 

102.0 

990 

113-9 

112.  1 

110.4 

108.7 

107.9 

107.1 

106.3 

105-5 

104.6 

103.8 

103.0 

1000 

115.1 

II3-3 

111.5 

109.8 

109.0 

108.2 

107.3 

106.5 

105.7 

104.9 

I04.I 

SMITHSONIAN  TABLES. 


80 


TABLE  17. 
REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 

Values  of  2000  X  m.  m  =  _ ^~^ \ 

18444+67. 536+ .003Z 


Altitude 
in 
metres. 
2. 

MEAN  TEMPERATURE  OP  AIR  COLUMN  IN  CENTIGRADE  DEGREES   (0). 

+  12° 

+  14° 

+  16° 

+  18° 

+  20° 

+  22° 

+  24° 

+  26° 

+  28° 

+  32° 

+  36° 

500 

51-6 

51.2 

50.9 

50.5 

50.1 

49«7 

494 

49-0 

48.6 

47-9 

47.2 

5io 

52.7 

52.3 

5L9 

51-5 

5i.i 

50.7 

50.3 

50.0 

49-6 

48.9 

48.2 

520 

53-7 

53-3 

52.9 

52.5 

52.1 

5L7 

5i.3 

51.0 

50.6 

49.8 

49.1 

530 

54-7 

54-3 

53-9 

53-5 

53-1 

52-7 

52.3 

51-9 

51.5 

50.8 

50.1 

540 

55-8 

55-3 

54-9 

54-5 

54-1 

53-7 

53-3 

52.9 

52.5 

51-8 

51.0 

550 

56.8 

56.4 

55-9 

55-5 

55-1 

54-7 

54.3 

53.9 

53-5 

52.7 

52.0 

560 

57-8 

574 

57.o 

56.5 

56.1 

55-7 

55-3 

54.9 

544 

53.7 

52-9 

570 

58.9 

584 

58.0 

57-5 

57-1 

56.7 

56.3 

55-8 

554 

54-6 

53-9 

580 

59-9 

594 

59-0 

58.5 

58.1 

57-7 

57-2 

56.8 

564 

55-6 

54-8 

59° 

60.9 

60.5 

60.0 

59-6 

59.i 

58.7 

58.2 

57.8 

574 

56.5 

55-7 

600 

62.0 

61.5 

61.0 

60.6 

60.1 

59-7 

59-2 

58.8 

58.3 

57-5 

56.7 

610 

63.0 

62.5 

62.0 

61.6 

61.1 

60.7 

60.2 

59.8 

59-3 

58.5 

57-6 

620 

64.0 

63.5 

63.1 

62.6 

62.1 

61.7 

61.2 

60.7 

60.3 

594 

58.6 

630 

65.1 

64.6 

64.1 

63.6 

63.1 

62.6 

62.2 

61.7 

61.3 

60.4 

59-5 

640 

66.1 

65.6 

65.1 

64.6 

64.1 

63-6 

63.2 

62.7 

62.2 

6i-3 

60.5 

650 

67.1 

66.6 

66.1 

65.6 

65.1 

64.6 

64.2 

63.7 

63-2 

62.3 

61.4 

660 

68.2 

67.6 

67.1 

66.6 

66.1 

65.6 

65.1 

64.7 

64.2 

63-3 

62.4 

670 

69.2 

68.7 

68.1 

67.6 

67.1 

66.6 

66.1 

65-6 

65.1 

64.2 

63-3 

680 

70.2 

69.7 

69.2 

68.6 

68.1 

67.6 

67.1 

66.6 

66.1 

65.2 

64.2 

690 

7i.3 

70.7 

70.2 

69.6 

69.1 

68.6 

68.1 

67.6 

67.1 

66.1 

65.2 

700 

72-3 

71.7 

71.2 

70.7 

70.1 

69.6 

69.1 

68.6 

68.1 

67.1 

66.1 

710 

73-3 

72.8 

72.2 

71.7 

71.1 

70.6 

70.1 

69.6 

69.0 

68.0 

67.1 

720 

74-4 

73-8 

73.2 

72-7 

72.1 

71.6 

71.1 

70.5 

70.0 

69.0 

68.0 

730 

754 

74-8 

74.2 

73-7 

73-i 

72.6 

72.0 

71-5 

71.0 

70.0 

69.0 

740 

76.4 

75-8 

75-3 

74-7 

74.1 

73-6 

73-o 

72.5 

72.0 

70.9 

69.9 

750 

77-5 

76.9 

76.3 

75-7 

75-1 

74.6 

74.0 

73-5 

72-9 

71.9 

70.9 

760 

78.5 

77.9 

77-3 

76.7 

76.1 

75-6 

75-0 

74-5 

73-9 

72.8 

71.8 

770 

79-5 

78.9 

78.3 

77-7 

77.i 

76.6 

76.0 

754 

74-9 

73-8 

72.8 

780 

80.6 

79-9 

79-3 

78.7 

78.1 

77-6 

77.0 

764 

75-9 

74-8 

73-7 

790 

81.6 

81.0 

80.3 

79-7 

79.1 

78.6 

78.0 

774 

76.8 

75-7 

74-6 

800 

82.6 

82.0 

81.4 

80.8 

80.1 

79-6 

79.0 

78.4 

77-8 

76.7 

75.6 

810 

83-7 

83.0 

82.4 

81.8 

81.2 

80.5 

79-9 

794 

78.8 

77-6 

76.5 

820 

84-7 

84.0 

834 

82.8 

82.2 

81.5 

80.9 

80.3 

79-7 

78.6 

77.5 

830 

85.7 

85.1 

84.4 

83-8 

83.2 

82.5 

81.9 

81.3 

80.7 

79-5 

784 

840 

86.8 

86.1 

854 

84.8 

84.2 

83.5 

82.9 

82.3 

81.7 

80.5 

794 

850 

87.8 

87.1 

86.4 

85.8 

85.2 

84.5 

83.9 

83.3 

82.7 

81.5 

80.3 

860 

88.8 

88.1 

87.5 

86.8 

86.2 

85-5 

84.9 

84.3 

83.6 

82.4 

81.3 

870 

89.9 

89.2 

88.5 

87.8 

87.2 

86.5 

85.9 

85.2 

84.6 

834 

82.2 

880 

90.9 

90.2 

89-5 

88.8 

88.2 

87.5 

86.9 

86.2 

85-6 

84-3 

83.1 

890 

91.9 

91.2 

90.5 

89.8 

89.2 

88.5 

87.8 

87.2 

86.6 

85-3 

84.1 

900 

93-° 

92.2 

9I«5 

90.8 

90.2 

89-5 

88.8 

88.2 

87-5 

86.3 

85.0 

910 

94.0 

93-3 

92.6 

91.9 

91.2 

90.5 

89.8 

89.2 

88.5 

87.2 

86.0 

920 

95-o 

94.3 

93-6 

92.9 

92.2 

9L5 

90.8 

90.1 

89-5 

88.2 

86.9 

930 

96.0 

95-3 

94.6 

93-9 

93.2 

92.5 

91.8 

91.1 

904 

89.1 

87.9 

940 

97.1 

96.3 

95-6 

94.9 

94-2 

93.5 

92.8 

92.1 

914 

90.1 

88.8 

950 

98.1 

974 

96.6 

95-9 

95-2 

94-5 

93.8 

93-i 

92.4 

91.1 

89.8 

960 

99.1 

98.4 

97.6 

96.9 

96.2 

95-5 

94-8 

94-1 

934 

92.0 

90.7 

970 

100.2 

994 

98.7 

97-9 

97-2 

96.5 

95-7 

95-0 

94.3 

93-0 

91.6 

980 

IOI.2 

100.4 

99.7 

98.9 

98.2 

974 

96.7 

96.0 

95-3 

93-9 

92.6 

990 

102.2 

101.5 

100.7 

99-9 

99.2 

98.4 

97-7 

97.0 

96.3 

94-9 

93-5 

1000 

103.3 

102.5 

101.7 

100.9 

100.2 

994 

98.7 

98.0 

97-3 

95-9 

94-5 

SMITHSONIAN  TABLES. 


81 


TABLE  17. 

REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 

Z  (i— fl) 


Values   of   2000  X  m. 


1 8444+67. 536+.  oo3Z 


Altitude 
In 
metres. 
Z. 

MEAN  TEMPERATURE  OF  AIR  COLUMN  IN  CENTIGRADE  DEGREES   (0). 

-16° 

-12° 

-8° 

-4° 

-2° 

0° 

+  2° 

+  4° 

+  6° 

+  8° 

+  10° 

1000 

115-1 

H3.3 

1  1  r.  5 

109.8 

109.0 

108.2 

107.3 

106.5 

105.7 

104.9 

104.1 

1010 

116.2 

114.4 

112.7 

110.9 

IIO.I 

109.3 

108.4 

107.6 

106.8 

105.9 

105.1 

IO2O 

117.4 

II5-5 

113.8 

II2.0 

III.  2 

110.3 

109.5 

108.7 

107.8 

107.0 

1  06.  2 

1030 

118.5 

116.7 

114.9 

II3.I 

II2.3 

111.4 

1  10.6 

100.7 

108.9 

108.0 

IO7.2 

1040 

119.7 

117.8 

1  1  6.0 

II4.2 

II34 

112.5 

HI.6 

1  10.8 

109.9 

109.1 

108.2 

1050 

120.8 

118.9 

117.1 

II5-3 

H4.5 

113.6 

112.7 

ni.8 

III.O 

IIO.I 

109.3 

1060 

I22.O 

1  20.  1 

118.2 

II6.4 

II5.6 

114.7 

113.8 

112.9 

1  1  2.0 

III.  2 

110.3 

1070 

I23.I 

I2I.2 

H9.3 

II7-5 

II6.6 

II5-7 

114.9 

114.0 

II3.I 

II2.2 

111.4 

1080 

124.3 

122.3 

120.5 

II8.6 

II7.7 

116.8 

U5.9 

115.0 

II4.2 

II3-3 

112.4 

1090 

1254 

123.5 

I2I.6 

II9.7 

II8.8 

117.9 

117.0 

116.1 

II5.2 

H4.3 

1134 

1100 

126.6 

124.6 

122.7 

120.8 

II9.9 

119.0 

118.1 

117.2 

II6.3 

II5-4 

114.5 

IIIO 

127.7 

125.7 

123.8 

121.9 

I2I.O 

I20.I 

119.2 

118.2 

H7.3 

II6.4 

115.5 

1  120 

128.9 

126.9 

124.9 

123.0 

122.  1 

121.  2 

120.2 

II9-3 

II8.4 

H7.5 

116.6 

1130 

130.0 

128.0 

126.0 

124.1 

123.2 

122.2 

I2I.3 

120.4 

1194 

H8.5 

117.6 

1140 

I3I.2 

I29.I 

127.2 

125.2 

124.3 

123.3 

122.4 

121.4 

120.5 

II9.6 

118.6 

1150 

132.3 

130.3 

128.3 

126.3 

1254 

1244 

1234 

122.5 

I2I.6 

120.6 

119.7 

1160 

133-5 

I3M 

129.4 

127.4 

126.4 

125.5 

124-5 

123.6 

122.6 

121.7 

120.7 

1170 

134.6 

132.5 

130.5 

128.5 

127.5 

126.6 

125.6 

124.6 

123.7 

122.7 

I2I.8 

1180 

135-8 

133.7 

131.6 

129.6 

128.6 

127.6 

126.7 

125.7 

124.7 

123.8 

122.8 

1190 

I36.9 

134.8 

132.7 

130.7 

129.7 

128.7 

1277 

126.8 

125.8 

124.8 

123.8 

1200 

I38.I 

135-9 

133.8 

131.8 

130.8 

129.8 

128.8 

127.8 

126.8 

125.9 

124.9 

I2IO 

139.2 

I37-I 

135.0 

132.9 

I3I.9 

130.9 

129.9 

128.9 

127.9 

126.9 

125.9 

I22O 

140.4 

138.2 

136.1 

134.0 

133.0 

132.0 

I3I.O 

130.0 

129.0 

128.0 

127.0 

1230 

I4I.5 

139-3 

137.2 

135.1 

I34-I 

I33-I 

I32.O 

131.0 

130.0 

129.0 

128.0 

1240 

142.7 

140.5 

138.3 

136.2 

135-2 

I34.I 

!33.i 

132-1 

I3I.I 

130.1 

129.0 

1250 

143.8 

141.6 

139.4 

137.3 

136.3 

135.2 

134.2 

^S-i 

I32.I 

131.1 

I30.I 

1260 

145.0 

142.7 

140.5 

138.4 

137.3 

136.3 

135-3 

134.2 

133-2 

132.1 

I3I.I 

1270 

I46.I 

143.9 

141.7 

139.5 

138.4 

1374 

136.3 

J35.3 

134.2 

133.2 

132.2 

1280 

147-3 

145.0 

142.8 

140.6 

139-5 

138.5 

1374 

136.3 

135-3 

134.2 

133.2 

1290 

148.4 

146.1 

143.9 

141.7 

140.6 

139.5 

138-5 

137-4 

136.3 

135.3 

134.2 

1300 

149.6 

147.3 

145.0 

142.8 

I4I.7 

140.6 

139-5 

138.5 

137-4 

136.3 

135.3 

1310 

1507 

148.4 

146.1 

143.9 

142.8 

I4I.7 

140.6 

139.5 

138.5 

137.4 

136.3 

1320 

I5I.9 

149-5 

147.2 

145.0 

143-9 

142.8 

141.7 

140.6 

139.5 

138.4 

1374 

1330 

153.0 

150.7 

148.3 

146.1 

145.0 

143.9 

142.8 

141.7 

140.6 

139.5 

138.4 

1340 

154.2 

151.8 

149.5 

147.2 

I46.I 

145-0 

143.8 

142.7 

I4I.6 

140.5 

139-5 

1350 

155.3 

152.9 

150.6 

148.3 

147-2 

146.0 

144.9 

143.8 

142.7 

141.6 

140.5 

1360 

156.5 

I54.I 

151.7 

149.4 

148.2 

I47.I 

146.0 

144.9 

143.7 

142.6 

I4I.5 

1370 

157-6 

155.2 

152.8 

150.5 

149-3 

148.2 

147.1 

145-9 

144.8 

143.7 

142.6 

1380 

158.8 

156.3 

153.9 

151.6 

150.4 

149-3 

148.1 

147.0 

145.9 

144.7 

143.6 

1390 

159-9 

157-5 

155.0 

152.7 

I5L5 

150.4 

149.2 

148.1 

146.9 

145.8 

144.7 

1400 

161.1 

158.6 

156.2 

153.8 

152.6 

I5I.4 

150.3 

149.1 

148.0 

146.8 

145.7 

1410 

162.2 

159-7 

157.3 

154.9 

1537 

152.5 

1514 

150.2 

149.0 

147.9 

146.7 

1420 

163.4 

160.8 

158.4 

156.0 

154.8 

153-6 

152.4 

151-3 

I50.I 

148.9 

147.8 

1430 

164.5 

162.0 

159.5 

157.! 

155-9 

154-7 

153-5 

152.3 

I5I.I 

150.0 

148.8 

1440 

165.7 

163.1 

160.6 

158.2 

157-0 

155.8 

154.6 

1534 

152.2 

151.0 

149.9 

1450 

166.8 

164.2 

161.7 

159.3 

I58.I 

156.8 

155-7 

154-5 

153-3 

152.1 

150.9 

1460 

168.0 

165.4 

162.8 

160.4 

I59-1 

157-9 

156.7 

155.5 

154.3 

153.1 

I5I.9 

1470 

169.1 

166.5 

164.0 

161.5 

160.2 

159-0 

157.8 

156.6 

155-4 

154.2 

153.0 

1480 

170.3 

167.6 

165.1 

162.6 

161.3 

1  60.  1 

158.9 

157-6 

156.4 

155.2 

154.0 

1490 

171.4 

1  68.8 

166.2 

163.7 

162.4 

161.2 

159-9 

158.7 

157-5 

156.3 

I55-I 

1500 

172.6 

169.9 

167.3 

164.8 

163.5 

162.3 

161.0 

159-8 

158.5 

157.3 

I56.I 

SMITHSONIAN  TABLES. 


82 


REDUCTION    OF   THE    BAROMETER    TO    SEA 

METRIC    MEASURES. 
Values   of   2000  X  m. 


TABLE 
LEVEL. 

Z  (i-jB) 
1 8444+67. 536+. oo3Z 


17, 


Altitude 
in 
metres. 
Z. 

MEAN  TEMPERATURE  OF  AIR  COLUMN  IN  CENTIGRADE  DEGREES   (0). 

+  12° 

+  14° 

+  16° 

+  18° 

+  20° 

+  22° 

-[-24° 

+  26° 

+  28° 

+  32° 

+  36° 

1000 

103.3 

102.5 

101.7 

100.9 

100.2 

994 

98.7 

98.0 

97-3 

95.9 

94-5 

IOIO 

104.3 

103.5 

102.7 

101.9 

IOI.2 

100.4 

99.7 

99-0 

98.2 

96.8 

954 

IO2O 

105.3 

104.5 

103.7 

103.0 

IO2.2 

101.4 

100.7 

99-9 

99.2 

97-8 

964 

1030 

106.4 

105.6 

104.8 

104.0 

103.2 

102.4 

101.7 

100.9 

100.2 

98.7 

97-3 

1040 

107.4 

106.6 

105.8 

105.0 

104.2 

103.4 

102.6 

101.9 

IOI.I 

99-7 

98.3 

1050 

108.4 

107.6 

106.8 

106.0 

105.2 

104.4 

103.6 

102.9 

IO2.I 

100.6 

99.2 

1060 

109-5 

108.6 

107.8 

107.0 

106.2 

105.4 

104.6 

103.9 

I03.I 

101.6 

IOO.I 

1070 

110.5 

109.7 

108.8 

108.0 

107.2 

106.4 

105.6 

104.8 

I04.I 

102.6 

ioi.i 

1080 

111.5 

110.7 

109.8 

109.0 

108.2 

107.4 

106.6 

105.8 

105.0 

103.5 

102.0 

1090 

1  12.6 

1x1.7 

110.9 

IIO.O 

109.2 

108.4 

107.6 

106.8 

I  O6.O 

104.5 

103.0 

1100 

113.6 

112.7 

111.9 

1  1  1.0 

1  10.2 

109.4 

108.6 

107.8 

107.0 

105.4 

103.9 

IIIO 

114.6 

113.8 

112.9 

1  1  2.0 

III.2 

110.4 

109.6 

108.8 

108.0 

106.4 

104.9 

II2O 

H5.7 

114.8 

II3-9 

IJ3- 

II2.2 

111.4 

110.5 

109.7 

108.9 

107.4 

105.8 

1130 

116.7 

115.8 

114.9 

114. 

II3.2 

112.4 

111.5 

110.7 

109.9 

108.3 

106.8 

1140 

117.7 

116.8 

II5-9 

US- 

II4.2 

1134 

112.5 

111.7 

II0.9 

109.3 

107.7 

1150 

118.8 

117.9 

117.0 

116. 

II5-2 

114.4 

II3-5 

112.7 

iu.8 

1  10.2 

108.6 

1160 

119.8 

118.9 

118.0 

117. 

116.2 

H5.3 

II4-5 

113.6 

II2.8 

III.2 

109.6 

1170 

120.8 

119.9 

119.0 

118.1 

117.2 

116.3 

II5-5 

114.6 

113.8 

II2.I 

110.5 

1180 

121.9 

120.9 

120.0 

119.1 

118.2 

H7.3 

116.5 

115.6 

114.8 

H3.I 

111.5 

1190 

122.9 

122.0 

I2I.O 

1  20.  1 

119.2 

118.3 

117.4 

116.6 

H5.7 

II4.I 

112.4 

1200 

123.9 

123.0 

I22.O 

121.  1 

120.2 

H9.3 

118.4 

117.6 

116.7 

II5.0 

"34 

I2IO 

125.0 

I24.O 

I23.I 

122.  1 

I2I.2 

120.3 

119.4 

118.5 

117.7 

116.0 

114-3 

1220 

126.0 

125.0 

I24.I 

I23.I 

122.2 

121.3 

120.4 

II9-5 

118.6 

116.9 

iiS-3 

1230 

127.0 

I26.I 

I25-I 

124.2 

123.2 

122.3 

121.4 

120.5 

119.6 

117.9 

116.2 

1240 

128.1 

I27.I 

I26.I 

125.2 

124.2 

123-3 

122.4 

121.5 

120.6 

118.9 

117.2 

1250 

129.1 

I28.I 

I27.I 

126.2 

125.2 

124.3 

123.4 

122.5 

I2I.6 

119.8 

118.1 

1260 

130.1 

I29.I 

I28.I 

127.2 

126.2 

125.3 

124.4 

123.4 

122.5 

120.8 

119.0 

1270 

131.2 

130.2 

129.2 

128.2 

127.2 

126.3 

125.3 

124.4 

123.5 

121.7 

I2O.O 

1280 

132.2 

I3I.2 

130.2 

129.2 

128.2 

127.3 

126.3 

125.4 

124.5 

122.7 

120.9 

1290 

133-2 

132.2 

I3I.2 

130.2 

129.2 

128.3 

127.3 

126.4 

125.5 

123.6 

I2I-9 

1300 

134-3 

133.2 

132.2 

I3I.2 

130.2 

129.3 

128.3 

127.4 

126.4 

124.6 

122.8 

1310 

135-3 

134-3 

133.2 

132.2 

I3I.2 

130.3 

129.3 

128.3 

127.4 

125.6 

123.8 

1320 

136.3 

135.3 

134.2 

133-2 

132.2 

131-3 

130.3 

129.3 

128.4 

126.5 

124.7 

1330 

1374 

136.3 

135.3 

134.2 

133.2 

132.2 

I3L3 

130-3 

129.3 

127.5 

125-7 

1340 

138.4 

137.3 

136.3 

135.3 

134.2 

133-2 

132.2 

131-3 

130.3 

128.4 

126.6- 

1350 

1394 

138.4 

137.3 

136.3 

135.2 

134.2 

133.2 

132.3 

131.3 

129.4 

127-5 

1360 

140.5 

J394 

138.3 

137-3 

136.2 

135.2 

134.2 

133.2 

132.3 

130.3 

128.5 

1370 

141-5 

140.4 

139.3 

138.3 

137.2 

136.2 

135.2 

134.2 

133.2 

131.3 

1294 

1380 

142.5 

141.4 

140.3 

139-3 

138.2 

137.2 

136.2 

135.2 

134.2 

132.3 

130.4 

1390 

143.5 

142.4 

I4I.4 

140.3 

139.2 

138.2 

137.2 

136.2 

135.2 

133.2 

W4 

1400 

144.6 

T43-5 

142.4 

I4L3 

140.2 

139.2 

138.2 

137.2 

136.2 

134.2 

132.3 

1410 

145.6 

144-5 

1434 

142.3 

I4I.3 

140.2 

139.2 

138.1 

137.1 

135.1 

133-2 

1420 

146.6 

H5.5 

1444 

143-3 

142.3 

141.2 

140.1 

I39-1 

138.1 

136.1 

134.2 

1430 

H7.7 

146.5 

1454 

144-3 

143.3 

142.2 

141.1 

140.1 

139.! 

137.1 

I35-I 

1440 

148.7 

147.6 

146.4 

145.3 

144-3 

143-2 

142.1 

141.1 

140.0 

138.0 

136.0 

1450 

149.7 

148.6 

147.5 

146.4 

145-3 

144.2 

I43-I 

142.1 

141.0 

139.0 

137.0 

1460 

150.8 

149.6 

148.5 

1474 

146.3 

145.2 

144.1 

143.0 

142.0 

139.9 

137.9 

1470 

151-8 

150.6 

149.5 

148.4 

147-3 

146.2 

I45-I 

144.0 

143.0 

140.9 

138-9 

1480 

152.8 

i5i.7 

150.5 

1494 

148.3 

147.2 

146.1 

145-0 

143.9 

141.8 

139-8 

1490 

153.9 

152.7 

I5L5 

150.4 

149.3 

148.2 

147.1 

146.0 

144.9 

142.8 

140.8 

1500 

154-9 

1537 

152.5 

I5M 

150.3 

149.1 

148.0 

147.0 

145.9 

143.8 

141.7 

SMITHSONIAN  TABLES. 


TABLE  17. 


REDUCTION     OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 


Values  of   2000  X  m. 


1 8444+67. 536+ .oo3Z 


Altitude 
in 
metres. 
Z. 

MEAN  TEMPERATURE  OF  AIR  COLUMN  IN  CENTIGRADE  DEGREES  (0). 

-16° 

-12° 

-8° 

-4° 

-2° 

0° 

+  2° 

+  4° 

+  6° 

+  8° 

+  10° 

1500 

172.6 

169.9 

167.3 

164.8 

163.5 

162.3 

161.0 

159.8 

158.5 

157-3 

156.1 

1510 

173-7 

171.0 

168.4 

165.9 

164.6 

163.3 

162.1 

160.8 

159.6 

158.4 

I57-I 

1520 

174.9 

172.2 

169.5 

167.0 

165.7 

164.4 

163.2 

161.9 

160.7 

159-4 

158.2 

1530 

176.0 

173.3 

170.7 

168.1 

166.8 

165.5 

164.2 

163.0 

161.7 

160.5 

159.2 

1540 

177.2 

174.4 

171.8 

169.1 

167.9 

166.6 

165.3 

164.0 

162.8 

161.5 

160.3 

1550 

178.3 

175-6 

172.9 

170.2 

169.0 

167.7 

166.4 

165.1 

163.8 

162.6 

161.3 

1560 

179-5 

176.7 

174.0 

171.3 

170.0 

168.7 

167.5 

166.2 

164.9 

163.6 

162.3 

1570 

180.6 

177.8 

I75-I 

172.4 

171.1 

169.8 

168.5 

167.2 

165.9 

164.7 

163.4 

1580 

181.8 

179.0 

176.2 

173.5 

172.2 

170.9 

169.6 

168.3 

167.0 

165.7 

164.4 

159° 

182.9 

180.1 

177-3 

174.6 

173-3 

172.0 

170.7 

169.4 

168.1 

166.8 

165.5 

1600 

184.1 

181.2 

178.5 

175.7 

1744 

173.1 

171.7 

170.4 

169.1 

167.8 

166.5 

1610 

185.2 

182.4 

179.6 

176.8 

175.5 

174.2 

172.8 

I7L5 

170.2 

168.9 

167.5 

1620 

186.4 

183-5 

180.7 

177.9 

176.6 

175.2 

173.9 

172.6 

171.2 

169.9 

168.6 

1630 

187-5 

184.6 

181.8 

179.0 

177.7 

176.3 

175-0 

173.6 

172.3 

170.9 

169.6 

1640 

188.7 

185.8 

182.9 

180.1 

178.8 

177.4 

176.0 

174.7 

173.3 

172.0 

170.7 

1650 

189.8 

186.9 

184.0 

181.2 

179-8 

178.5 

177.1 

1757 

174.4 

173.0 

171.7 

1660 

191.0 

188.0 

185.1 

182.3 

180.9 

179.6 

178.2 

176.8 

1754 

174.1 

172.7 

1670 

192.2 

189.2 

186.3 

183.4 

182.0 

180.6 

179.3 

177.9 

176.5 

I75-I 

173.8 

1680 

I93.3 

190.3 

187.4 

184.5 

183.1 

181.7 

180.3 

178.9 

177.6 

176.2 

174.8 

1690 

194.5 

191.4 

188.5 

185.6 

184.2 

182.8 

181.4 

180.0 

178.6 

177.2 

175.9 

1700 

r95-6 

192.6 

189.6 

186.7 

185-3 

183.9 

182.5 

181.1 

179.7 

178.3 

176,9 

1710 

196.8 

193-7 

190.7 

187.8 

186.4 

185.0 

183.5 

182.1 

180.7 

179-3 

177.9 

1720 

197.9 

194.8 

191.8 

188.9 

187-5 

186.0 

184.6 

183.2 

181.8 

180.4 

179.0 

1730 

199.1 

196.0 

193.0 

190.0 

188.6 

187.1 

185.7 

184.3 

182.8 

181.4 

180.0 

1740 

200.2 

197.1 

194.1 

191.1 

189.7 

188.2 

186.8 

185-3 

183-9 

182.5 

181.1 

1750 

201-4 

198.2 

195.2 

192.2 

190.7 

189.3 

187.8 

186.4 

185.0 

183-5 

182.1 

1760 

202.5 

J99-3 

196.3 

193.3 

191.8 

190.4 

188.9 

187-5 

186.0 

184.6 

183.1 

1770 

203.7 

200.5 

197.4 

194.4 

192.9 

I9L5 

190.0 

188.5 

187.1 

185.6 

184.2 

1780 

2O4.8 

2OI.6 

198.5 

195.5 

194.0 

192-5 

191.1 

189.6 

188.1 

186.7 

185.2 

1790 

2O6.O 

202.7 

199.6 

196.6 

I95.I 

193.6 

192.1 

190.7 

189.2 

187.7 

186.3 

1800 

207.1 

203.9 

200.8 

197,7 

196.2 

194.7 

193.2 

191.7 

190.2 

188.8 

187.3 

1810 

208.3 

205.0 

201.9 

198.8 

197-3 

195-8 

194.3 

192.8 

I9L3 

189.8 

188.3 

1820 

2094 

206.1 

203.0 

199.9 

198.4 

196.9 

195.3 

193.8 

192.4 

190.9 

189.4 

1830 

210.6 

207.3 

204.1 

201.0 

199-5 

197.9 

196.4 

194.9 

193-4 

191.9 

190.4 

1840 

211.7 

208.4 

205.2 

202.1 

200.6 

199.0 

197.5 

196.0 

J94.5 

193.0 

I9L5 

1850 

212.9 

209.5 

206.3 

203.2 

201.6 

200.1 

198.6 

197.0 

195.5 

194.0 

192.5 

1860 

214.0 

210.7 

207.4 

204.3 

202.7 

201.2 

199.6 

198.1 

196.6 

I95-I 

193.6 

1870 

215.2 

2II.8 

208.6 

2054 

203.8 

202.3 

200.7 

199.2 

197.6 

196.1 

194.6 

1880 

216.3 

212.9 

209.7 

206.5 

204.9 

203.3 

201.8 

200.2 

198.7 

197.2 

195.6 

1890 

217.5 

214.1 

210.8 

2O7.6 

206.0 

2044 

202.9 

201.3 

199.7 

198.2 

196.7 

1900 

218.6 

215.2 

211.9 

208.7 

207.1 

205.5 

203.9 

202.4 

200.8 

199-3 

197.7 

1910 

219.8 

216.3 

213.0 

209.8 

208.2 

206.6 

205.0 

2034 

201.9 

200.3 

198.8 

1920 

220.9 

217.5 

214.1 

210.9 

209.3 

207.7 

206.  1 

204.5 

202.9 

201.3 

199.8 

1930 

222.1 

218.6 

215.2 

212.0 

210.4 

208.8 

207.2 

205.6 

204.0 

202.4 

200.8 

1940 

223.2 

219.7 

216.4 

2I3.I 

211.4 

209.8 

208.2 

206.6 

205.0 

203.4 

201.9 

1950 

2244 

220.9 

217.5 

214.2 

212.5 

210.9 

209.3 

207.7 

206.  1 

204.5 

202.9 

1960 

225.5 

222.O 

218.6 

215.3 

213.6 

2I2.O 

210.4 

208.8 

207.1 

205.5 

204.0 

1970 

226.7 

223.1 

219.7 

2l6.4 

214.7 

2I3.I 

211.4 

209.8 

208.2 

206.6 

205.0 

1980 

227.8 

224.3 

220.8 

217.5 

215.8 

214.2 

212.5 

2IO.9 

209.3 

207.6 

206.0 

1990 

229.0 

2254 

221.9 

218.6 

216.9 

215.2 

213.6 

2II.9 

210.3 

208.7 

207.1 

2000 

230.1 

226.5 

223.0 

219.7 

218.0 

216.3 

214.7 

213.0 

211.4 

209.7 

208.1 

SMITHSONIAN  TABLES. 


84 


TABLE  17, 
REDUCTION    OF   THE    BAROMETER   TO   SEA    LEVEL. 

METRIC    MEASURES. 

Z  (i—  B) 


Values   of   2OOO  X  m. 


18444+67.55 


Altitude 
in 
metres. 
Z. 

MEAN  TEMPERATURE  OF  AIR  COLUMN  IN  CENTIGRADE  DEGREES   (0). 

+  12° 

-f  14° 

+  16° 

+  18° 

+  20° 

+  22° 

+  24° 

+  26° 

+  28° 

+  32° 

+  36° 

1500 

154-9 

153-7 

152.5 

151-4 

150.3 

149.1 

148.0 

147.0 

145-9 

143.8 

141.7 

1510 

155-9 

154-7 

153-6 

152.4 

151-3 

150.1 

149.0 

147.9 

146.8 

144.7 

142.7 

1520 

i57.o 

155.8 

154.6 

153-4 

152.3 

151.1 

150.0 

148.9 

147.8 

145-7 

143.6 

1530 

158.0 

156.8 

155-6 

154-4 

153-3 

152.1 

151.0 

149.9 

148.8 

146.6 

144-5 

1540 

159-0 

157-8 

156.6 

1554 

154.3 

I53.I 

152.0 

150.9 

149.8 

147.6 

145-5 

1550 

1  60.  i 

158.8 

157-6 

156.4 

155-3 

I54.I 

153-0 

151.8 

150.7 

148.6 

146.4 

1560 

161.1 

!59-9 

158.7 

157.5 

156.3 

I55-I 

154.0 

152.8 

151-7 

149.5 

•147.4 

1570 

162.1 

160.9 

159-7 

158.5 

157-3 

156.1 

154.9 

153-8 

152.7 

150.5 

148.3 

1580 

163.2 

161.9 

160.7 

159-5 

158.3 

i57.i 

155-9 

154-8 

153-7 

1514 

J49-3 

1590 

164.2 

162.9 

161.7 

160.5 

159.3 

158.1 

156.9 

155.8 

154.6 

152.4 

150.2 

1600 

165.2 

164.0 

162.7 

161.5 

160.3 

159-1 

157.9 

156.7 

155-6 

153.3 

151.2 

1610 

166.3 

165.0 

163.7 

162.5 

161.3 

1  60.  i 

158.9 

157.7 

156.6 

154.3 

152.1 

1620 

167-3 

166.0 

164.8 

163.5 

162.3 

161.1 

159-9 

158.7 

157-5 

155.3 

153-0 

1630 

168.3 

167.0 

165-8 

164.5 

163.3 

162.1 

160.9 

159.7 

158.5 

156.2 

154.0 

1640 

169.4 

168.1 

166.8 

165.5 

164.3 

163.1 

161.9 

160.7 

159-5 

157-2 

154.9 

1650 

170.4 

169.1 

167.8 

166.5 

165.3 

164.1 

162.8 

161.6 

160.5 

158.1 

155-9 

1660 

171.4 

170.1 

168.8 

167.5 

166.3 

165.1 

163.8 

162.6 

161.4 

I59.I 

156.8 

1670 

172.5 

171.1 

169.8 

168.6 

167.3 

166.0 

164.8 

163.6 

162.4 

1  60.  i 

157.8 

1680 

173-5 

172.2 

170.9 

169.6 

168.3 

167.0 

165.8 

164.6 

1634 

161.0 

158.7 

1690 

174-5 

173.2 

171.9 

170.6 

169-3 

168.0 

166.8 

165.6 

164.3 

162.0 

159.7 

1700 

175.6 

174.2 

172.9 

171.6 

170.3 

169.0 

167.8 

166.5 

165.3 

162.9 

160.6 

1710 

176.6 

175-2 

173-9 

172.6 

171.3 

170.0 

168.8 

167-5 

166.3 

163.9 

161.5 

1720 

177.6 

176.3 

174.9 

173.6 

172.3 

171.0 

169.7 

168.5 

167.3 

164.8 

162.5 

1730 

178.7 

177.3 

175-9 

174.6 

173-3 

172.0 

170.7 

169.5 

168.2 

165-8 

163.4 

1740 

179.7 

178.3 

177.0 

175.6 

1743 

173.0 

171.7 

170.5 

169.2 

166.8 

164.4 

1750 

180.7 

179.3 

178.0 

176.6 

175.3 

174.0 

172.7 

171.4 

170.2 

167.7 

165.3 

1760 

181.7 

180.4 

179.0 

177.6 

176.3 

i75.o 

1737 

172.4 

171.2 

168.7 

166.3 

1770 

182.8 

181.4 

180.0 

178.6 

177-3 

176.0 

174-7 

1734 

172.1 

169.6 

167.2 

1780 

183.8 

182.4 

181.0 

179.7 

178.3 

177.0 

175.7 

1744 

I73-I 

170.6 

168.2 

1790 

184.8 

183.4 

182.0 

180.7 

*79'3 

178.0 

176.7 

175-4 

174.1 

171.6 

169.1 

1800 

185.9 

184.5 

183.1 

181.7 

180.3 

179.0 

177.6 

176.3 

i75.o 

172.5 

170.0 

1810 

186.9 

185-5 

184.1 

182.7 

181.3 

180.0 

178.6 

177.3 

176.0 

173-5 

171.0 

1820 

187.9 

186.5 

185.1 

183.7 

182.3 

181.0 

179.6 

178.3 

177.0 

174.4 

171.9 

1830 

189.0 

187.5 

186.1 

184.7 

183.3 

181.9 

180.6 

179.3 

178.0 

175-4 

172.9 

1840 

190.0 

188.6 

187.1 

185-7 

184.3 

182.9 

181.6 

180.3 

178.9 

176.3 

173.8 

1850 

191.0 

189.6 

188.1 

186.7 

185-3 

183.9 

182.6 

181.2 

179.9 

177.3 

174.8 

1860 

192.1 

190.6 

189.2 

187.7 

186.3 

184.9 

133.6 

182.2 

180.9 

178.3 

175.7 

1870 

I93.I 

191.6 

190.2 

188.7 

187.3 

185.9 

184.5 

183.2 

181.8 

179.2 

176.7 

1880 

194.1 

192.7 

191.2 

189.7 

188.3 

186.9 

185.5 

184.2 

182.8 

180.2 

177.6 

1890 

195.2 

193.7 

192.2 

190.8 

189.3 

187.9 

186.5 

185.1 

183.8 

181.1 

178.5 

1900 

196.2 

194.7 

193.2 

191.8 

190.3 

188.9 

187.5 

186.1 

184.8 

182.1 

179-5 

1910 

197.2 

195.7 

194.2 

192.8 

191.3 

189.9 

188.5 

187.1 

185-7 

183.1 

180.4 

1920 

198.3 

196.8 

195-3 

193-8 

192.3 

190.9 

189.5 

188.1 

186.7 

184.0 

181.4 

1930 

199-3 

197.8 

196.3 

194.8 

I93.3 

191.9 

190-5 

189.1 

187.7 

185.0 

182.3 

1940 

200.3 

198.8 

197.3 

195.8 

194-3 

192.9 

I9L5 

190.0 

188.7 

185.9 

183.3 

1950 

201.4 

199.8 

198.3 

196.8 

195-3 

T93-9 

192.4 

191.0 

189.6 

186.9 

184.2 

1960 

202.4 

200.8 

!99-3 

197.8 

196.3 

194.9 

193-4 

192.0 

190.6 

187.8 

185.2 

1970 

203.4 

201.9 

200.3 

198.8 

197.3 

195-9 

194.4 

193.0 

191.6 

188.8 

186.1 

1980 

204.5 

202.9 

201.4 

199.8 

198.3 

196.9 

1954 

194.0 

192.5 

189.8 

187.0 

1990 

205.5 

203.9 

202.4 

200.8 

I99.3 

197.9 

196.4 

194.9 

193.5 

190.7 

188.0 

2000 

206.5 

204.9 

203.4 

201.9 

200.3 

198.8 

1974 

195.9 

194.5 

191.7 

188.9 

SMITHSONIAN  TABLES. 


TABLE  17. 

REDUCTION    OF   THE    BAROMETER    TO   SEA    LEVEL. 

METRIC    MEASURES. 


Values  of  2000  X  m. 


Z  (i— 0) 


18444+67. 536+ .003Z 


Altitude 
in 
metres. 
Z. 

MEAN  TEMPERATURE  OF  AIR  COLUMN  IN   CENTIGRADE  DEGREES   (0). 

-16° 

-12° 

-8° 

-4° 

-2° 

0° 

+  2° 

+.4° 

+  6° 

+  8° 

+  10° 

2000 

230.1 

226.5 

223.0 

219.7 

218.0 

216.3 

214-7 

213.0 

211.4 

209.7 

208.1 

2010 

231-3 

227.7 

224.2 

220.8 

219.1 

217.4 

215-7 

214.1 

212.4 

210.8 

209.2 

2020 

232.4 

228.8 

225.3 

221.9 

220.2 

218.5 

216.8 

215.1 

213-5 

2II.8 

210.2 

2030 

233-6 

229.9 

226.4 

223.0 

221.3 

219.6 

217.9 

216.2 

214-5 

212.9 

211.  2 

2O4O 

234-7 

231.1 

227.5 

224.0 

222.3 

22O.6 

219.0 

217.3 

215.6 

213.9 

212.3 

2050 

235-9 

232.2 

228.6 

225.1 

2234 

221.7 

22O.O 

218.3 

216.7 

215.0 

213-3 

2060 

237.0 

233-3 

229.7 

226.2 

224-5 

222.8 

221.  1 

219.4 

217.7 

2  1  6.0 

2144 

2070 

238.2 

234-4 

230.9 

227.3 

225.6 

223.9 

222.2 

220.5 

218.8 

217.1 

2154 

2080 

239-3 

235.6 

232.0 

228.4 

226.7 

225.0 

223.2 

221.5 

219.8 

218.1 

2l6.4 

2090 

240.5 

236.7 

233-1 

229.5 

227.8 

226.1 

224.3 

222.6 

220.9 

219.2 

217-5 

2100 

241.6 

237.8 

234.2 

230.6 

228.9 

227.1 

2254 

223.7 

221.9 

22O.2 

218.5 

2110 

242.8 

239.0 

235-3 

231.7 

230.0 

228.2 

226.5 

224.7 

223.0 

221.3 

219.6 

2I2O 

243-9 

240.1 

236.4 

232.8 

23I.I 

229.3 

227.5 

225.8 

224.0 

222.3 

22O.6 

2130 

245.1 

241.2 

237-5 

233-9 

232.2 

230.4 

228.6 

226.9 

225.1 

2234 

221.6 

2140 

246.2 

242.4 

238.7 

235.0 

233.2 

231.5 

229.7 

227.9 

226.2 

2244 

222.7 

2150 

2474 

243.5 

239.8 

236.1 

234.3 

232.5 

230.8 

229.O 

227.2 

225.5 

2237 

2160 

248.5 

244.6 

240.9 

237.2 

2354 

233.6 

231.8 

230.0 

228.3 

226.5 

224.8 

2170 

249.7 

245-8 

242.0 

238.3 

236.5 

234-7 

232.9 

23I.I 

229.3 

227.6 

225.8 

2180 

250.8 

246.9 

243-1 

2394 

237.6 

235.8 

234.0 

232.2 

230.4 

228.6 

226.8 

2190 

252.0 

248.0 

244.2 

240.5 

238.7 

236.9 

235.1 

233.2 

231.4 

229.7 

227.9 

2200 

253-1 

249.2 

2454 

241.6 

239.8 

237.9 

236.1 

234.3 

232-5 

230.7 

228.9 

22IO 

254-3 

250.3 

246.5 

242.7 

240.9 

239-0 

237.2 

235-4 

233-6 

231.7 

230.0 

2220 

255-4 

251.4 

247.6 

243.8 

242.O 

24O.I 

238.3 

236.4 

234.6 

232.8 

231.0 

2230 

256.6 

252.6 

248.7 

244-9 

243.0 

241.2 

239-3 

237.5 

235-7 

233-8 

232.0 

2240 

2577 

253-7 

249.8 

246.0 

244.1 

242.3 

240.4 

238.6 

236.7 

234-9 

233-1 

2250 

258.9 

254-8 

250.9 

247.1 

245.2 

2434 

241.5 

239.6 

237.8 

235-9 

234.1 

2260 

260.0 

256.0 

252.0 

248.2 

246.3 

244-4 

242.6 

240.7 

238.8 

237.0 

235-2 

2270 

261.2 

257.1 

253-2 

249.3 

247.4 

245-5 

243.6 

241.8 

239-9 

238.0 

236.2 

2280 

262.3 

258.2 

254.3 

250.4 

248.5 

246.6 

2447 

242.8 

241.0 

239.I 

237.2 

2290 

263.5 

259-4 

2554 

25L5 

249.6 

247-7 

245-8 

243-9 

242.0 

240.1 

238.3 

2300 

264.6 

260.5 

256.5 

252.6 

250.7 

248.8 

246.9 

245.0 

243.1 

241.2 

239-3 

2310 

265.8 

261.6 

257.6 

2537 

251.8 

249.8 

247.9 

246.0 

244.1 

242.2 

240.4 

2320 

266.9 

262.8 

258.7 

254-8 

252.9 

250.9 

249.0 

247.1 

245-2 

243.3 

241.4 

2330 

268.1 

263.9 

259.8 

255.9 

253-9 

252.0 

250.1 

248.1 

246.2 

244.3 

242.4 

2340 

269.2 

265.0 

261.0 

257.0 

255.0 

253-1 

25I.I 

249.2 

247-3 

245-4 

243-5 

2350 

270.4 

266.1 

262.1 

258.1 

256.1 

254.2 

252.2 

250.3 

248.3 

246.4 

244-5 

2360 

271-5 

267.3 

263.2 

259.2 

257-2 

255-2 

253-3 

25L3 

249.4 

247-5 

245.6 

2370 

272.7 

2684 

264.3 

260.3 

258.3 

256.3 

254-4 

2524 

250.5 

248.5 

246.6 

2380 

273.8 

269.5 

265.4 

261.4 

2594 

2574 

2554 

253-5 

251.5 

249.6 

247.6 

2390 

275.0 

270.7 

266.5 

262.5 

260.5 

258.5 

256.5 

254-5 

252.6 

250.6 

248.7 

2400 

276.1 

271.8 

267.7 

263.6 

261.6 

259.6 

257.6 

255.6 

253-6 

251.7 

249-7 

2410 

277.3 

272.9 

268.8 

264.7 

262.7 

260.7 

258.7 

256.7 

254.7 

252.7 

250.8 

2420 

278.4 

274.1 

269.9 

265.8 

263.7 

261.7 

259.7 

257-7 

255-7 

253.8 

251.8 

2430 

279.6 

275.2 

271.0 

266.9 

264.8 

262.8 

260.8 

258.8 

256.8 

254.8 

252.8 

2440 

280.7 

276.3 

272.1 

268.0 

265.9 

263.9 

261.9 

259-9 

257.9 

255.9 

253.9 

2450 

281.9 

277-5 

273.2 

269.1 

267.0 

265.0 

262.9 

260.9 

258.9 

256.9 

254.9 

2460 

283.0 

278.6 

274-3 

27O.2 

268.1 

266.1 

264.0 

262.O 

260.0 

258.0 

256.0 

2470 

284.2 

279.7 

275.5 

271.3 

269.2 

267.1 

265.1 

263.1 

261.0 

259-0 

257.0 

2480 

285.3 

280.9 

276.6 

272.4 

270.3 

268.2 

266.2 

264.1 

262.1 

26O.I 

258.0 

2490 

286.5 

282.0 

277.7 

273.5 

271.4 

269.3 

267.2 

265.2 

263.1 

26l.I 

259-1 

2500 

287.6 

283.1 

278.8 

274-5 

272.5 

270.4 

268.3 

266.2 

264.2 

262.2 

260.1 

SMITHSONIAN  TABLE*. 


86 


TABLE  17. 

REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 

Z  (i—  fi) 


Values  of   2000  X  m. 


Altitude 
in 
metres. 
Z. 

MEAN  TEMPERATURE  OF  AIR  COLUMN  IN  CENTIGRADE  DEGREES   (0). 

+  12° 

+  14° 

+  16° 

+  18° 

+  20° 

+  22° 

+  24° 

+  26° 

+  28° 

+  32° 

+  36° 

2000 

206.5 

204.9 

203.4 

201.9 

200.3 

198.8 

1974 

195.9 

194.5 

191.7 

188.9 

2OIO 

207.6 

206.0 

204.4 

202.9 

201.3 

199.8 

198.4 

196.9 

195-5 

192.6 

189.9 

2O2O 

208.6 

207.0 

205.4 

203.9 

202.3 

200.8 

!99-3 

197.9 

196.4 

193.6 

190.8 

2030 

209.6 

208.0 

206.4 

204.9 

203.3 

201.8 

200.3 

198.8 

1974 

194.6 

191.8 

2040 

210.7 

209.0 

207.5 

205.9 

204.3 

202.8 

201.3 

199.8 

198.4 

I95.5 

192.7 

2050 

211.7 

2  10.  1 

208.5 

206.9 

205.3 

203.8 

202.3 

200.8 

199-3 

196.5 

1937 

2060 

212.7 

211.  1 

209.5 

207.9 

206.3 

204.8 

203.3 

201.8 

200.3 

1974 

.  194.6 

2070 

213.8 

2I2.I 

210.5 

208.9 

207.3 

205.8 

204.3 

202.8 

201.3 

198.4 

195.5 

2080 

214.8 

2I3.I 

211.5 

209.9 

208.3 

206.8 

205.3 

203.7 

202.3 

199.3 

196.5 

2090 

215.8 

214.2 

212.5 

210.9 

209.3 

207.8 

206.3 

204.7 

203.2 

200.3 

197.4 

2100 

216.8 

215.2 

213.5 

211.9 

210.4 

208.8 

207.2 

205.7 

204.2 

201.3 

198.4 

2110 

217.9 

216.2 

214.6 

213.0 

211.4 

209.8 

208.2 

206.7 

205.2 

202.2 

199.3 

2120 

218.9 

217.2 

215.6 

214.0 

212.4 

210.8 

209.2 

207.7 

206.2 

2O3.2 

200.3 

2130 

219.9 

218.3 

216.6 

215.0 

213.4 

2II.8 

2IO.2 

208.6 

207.1 

204.1 

2OI.2 

2I4O 

22  1.  0 

219.3 

217.6 

216.0 

214.4 

212.8 

2II.2 

209.6 

208.1 

205.1 

202.2 

2150 

222.0 

220.3 

218.6 

217.0 

215.4 

213.8 

212.2 

210.6 

209.1 

206.  1 

203.1 

2160 

223.0 

221.3 

219.6 

218.0 

216.4 

214-7 

213.2 

2II.6 

210.0 

207.0 

204.0 

2170 

224.1 

222.4 

220.7 

219.0 

217.4 

215-7 

2I4.I 

212.6 

21  1.  0 

208.0 

205.0 

2180 

225.1 

2234 

221.7 

22O.O 

218.4 

2l6.7 

2I5.I 

213-5 

2I2.O 

208.9 

205.9 

2190 

226.1 

2244 

222.7 

22  1.  0 

219.4 

217.7 

216.1 

214.5 

213.0 

209.9 

206.9 

2200 

227.2 

2254 

223.7 

222.0 

220.4 

218.7 

217.1 

215-5 

213.9 

210.8 

207.8 

2210 

228.2 

226.5 

224.7 

223.0 

221.4 

219.7 

218.1 

216.5 

214.9 

2II.8 

208.8 

222O 

229.2 

227-5 

225.7 

224.0 

222.4 

220.7 

219.1 

217-5 

215.9 

212.8 

209.7 

2230 

230.3 

228.5 

226.8 

225.1 

223.4 

221.7 

2  2O.  I 

2l8.4 

216.8 

213.7 

210.7 

2240 

231.3 

229-5 

227.8 

226.1 

224.4 

222.7 

221.0 

2194 

217.8 

214.7 

2II.6 

2250 

232.3 

230.6 

228.8 

227.1 

225.4 

223.7 

222.0 

220.4 

218.8 

215.6 

212.5 

2260 

2334 

231.6 

229.8 

228.1 

226.4 

224.7 

223.0 

221.4 

219.8 

216.6 

213.5 

2270 

2344 

232.6 

230.8 

229.1 

227.4 

225.7 

224.0 

222.4 

220.7 

217.6 

214.4 

2280 

2354 

233-6 

231.8 

230.1 

228.4 

226.7 

225.0 

223.3 

221.7 

218.5 

215.4 

2290 

236.5 

2347 

232.9 

23I.I 

229.4 

227.7 

226.0 

224.3 

222.7 

219.5 

216.3 

2300 

237-5 

235-7 

233-9 

232.1 

230.4 

228.7 

227.0 

225.3 

223.6 

220.4 

217.3 

2310 

238.5 

236.7 

234.9 

233-1 

231.4 

229.7 

228.0 

226.3 

224.6 

221.4 

218.2 

2320 

239.6 

237-7 

235.9 

234.1 

232.4 

230.7 

228.9 

227.3 

225.6 

222.3 

219.2 

2330 

240.6 

238.7 

236.9 

235.1 

2334 

231.6 

229.9 

228.2 

226.6 

223.3 

2  2O.  I 

2340 

241.6 

239.8 

237.9 

236.2 

2344 

232.6 

230.9 

229.2 

227.5 

224.3 

221.0 

2350 

242.7 

240.8 

239.0 

237.2 

2354 

233-6 

231.9 

230.2 

228.5 

225.2 

222.0 

2360 

243-7 

241.8 

240.0 

238.2 

236.4 

234.6 

232.9 

231.2 

229.5 

226.2 

222.9 

2370 

244-7 

242.8 

241.0 

239.2 

2374 

235.6 

233.9 

232.2 

230.4 

227.1 

223.9 

2380 

245-7 

243.9 

242.0 

240.2 

2384 

236.6 

234.9 

233-1 

2314 

228.1 

224.8 

2390 

246.8 

244.9 

243-0 

241.2 

2394 

237.6 

235.8 

234.1 

232.4 

229.1 

225.8 

2400 

247.8 

245.9 

244.0 

242.2 

240.4 

238.6 

236.8 

235.1 

2334 

230.0 

226.7 

2410 

248.8 

246.9 

245.1 

243.2 

241.4 

239.6 

237-8 

236.1 

234.3 

231.0 

227.7 

2420 

249.9 

248.0 

246.1 

244.2 

242.4 

24O.6 

238.8 

237.1 

235-3 

231.9 

228.6 

2430 

250.9 

249.0 

247.1 

245.2 

2434 

241.6 

239.8 

238.0 

236.3 

232.9 

229.5 

2440 

25L9 

250.0 

248.1 

246.2 

244.4 

242.6 

240.8 

239-0 

237-3 

233-8 

230.5 

2450 

253.0 

251.0 

249.1 

247.3 

2454 

243.6 

241.8 

240.0 

238.2 

234-8 

231.4 

2460 

254.0 

252.1 

250.1 

248.3 

246.4 

244.6 

242.8 

24I.O 

239.2 

235.8 

232.4 

2470 

255.0 

253.1 

251.2 

249.3 

247.4 

245.6 

2437 

241.9 

240.2 

236.7 

233.3 

2480 

256.1 

254.1 

252.2 

250.3 

248.4 

246.6 

244.7 

242.9 

24I.I 

237.7 

234.3 

2490 

257-1 

255.1 

253-2 

251.3 

249.4 

247-5 

245-7 

243.9 

242.1 

238.6 

235-2 

2500 

258.1 

256.2 

254.2 

252.3 

250.4 

248.5 

246.7 

244-9 

243.1 

239-6 

236.2 

SMITHSONIAN  TABLES. 


TABLE  17. 

REDUCTION    OF  THE    BAROMETER    TO    SEA    LEV&L, 

METRIC    MEASURES. 


Values   of   2000  X  m. 


Z  (i-jB) 


Altitude 
in 
metres. 
2. 

MEAN  TEMPERATURE  OF  AIR  COIJJMN  IN  CENTIGRADE  DEGREES   (0). 

-16° 

-12° 

-8° 

-4° 

-2° 

0° 

+  2° 

+  4° 

+  6° 

+  8° 

-HO0 

2500 

287.6 

283.1 

278.8 

274.5 

272.5 

270.4 

268.3 

266.2 

264.2 

262.2 

260.1 

2510 

288.8 

284.3 

279.9 

275.6 

273-6 

271.5 

269.4 

267.3 

265.2 

263.2 

261.2 

2520 

289.9 

285.4 

281.0 

276.7 

274.6 

272.5 

270.5 

268.4 

266.3 

264.2 

262.2 

253° 

291.1 

286.5 

282.1 

277.8 

2757 

273.6 

271-5 

269.4 

267.4 

265-3 

263.2 

2540 

292.2 

287.7 

283.3 

278.9 

276.8 

274.7 

272.6 

270.5 

268.4 

266.3 

264.3 

2550 

2934 

288.8 

284.4 

280.0 

277.9 

275-8 

273.7 

271.6 

269.5 

267.4 

265.3 

2560 

294-5 

289.9 

285.5 

281.1 

279.0 

276.9 

274.7 

272.6 

270.5 

268.4 

266.4 

2570 

2957 

291.1 

286.6 

282.2 

280.1 

277.9 

275.8 

273-7 

271.6 

269.5 

267.4 

2580 

296.8 

292.2 

287.7 

283-3 

281.2 

279.0 

276.9 

274.8 

272.6 

270.5 

268.4 

2590 

298.0 

293.3 

288.8 

284.4 

282.3 

280.1 

278.0 

275.8 

273-7 

271.6 

269.5 

2600 

299.1 

294.5 

290.0 

285.5 

283.4 

281.2 

279.0 

276.9 

274.8 

272.6 

270.5 

2610 

300-3 

295.6 

291.1 

286.6 

284.4 

282.3 

280.1 

278.0 

275.8 

273.7 

271.6 

2620 

301.4 

296.7 

292.2 

287.7 

285.5 

283.4 

281.2 

279.0 

276.9 

274.7 

272.6 

2630 

302.6 

297.8 

293.3 

288.8 

286.6 

284.4 

282.3 

280.1 

277.9 

275-8 

273.6 

2640 

303-7 

299.0 

2944 

289-9 

287.7 

285.5 

283.3 

281.1 

279.0 

276.8 

274.7 

2650 

304-9 

300.1 

295.5 

291.0 

288.8 

286.6 

284.4 

282.2 

280.0 

277-9 

275-7 

2660 

306.0 

301.2 

296.6 

292.1 

289.9 

287.7 

285-5 

283.3 

281.1 

278.9 

276.8 

2670 

307.2 

302.4 

297-8 

293.2 

291.0 

288.8 

286.5 

284.3 

282.1 

280.0 

277.8 

2680 

308.3 

303.5 

298.9 

294-3 

292.1 

289.8 

287.6 

285.4 

283.2 

281.0 

278.8 

2690 

309-5 

304-6 

300.0 

295-4 

293-2 

290.9 

288.7 

286.5 

284.3 

282.1 

279-9 

2700 

310.6 

305-8 

301.1 

296.5 

294.2 

292.0 

289.8 

287.5 

285.3 

283.1 

280.9 

2710 

311.8 

306.9 

302.2 

297.6 

295.3 

293.1 

290.8 

288.6 

286.4 

284.2 

282.0 

2720 

312.9 

308.0 

303-3 

298.7 

296.4 

294.2 

291.9 

289.7 

287.4 

285.2 

283.0 

2730 

314-1 

309.2 

304.5 

299.8 

297.5 

295.2 

293.0 

290.7 

288.5 

286.3 

284.0 

2740 

315.2 

310.3 

305.6 

300.9 

298.6 

296.3 

294.1 

291.8 

289.5 

287.3 

285.1 

2750 

316.4 

3II.4 

306.7 

302.0 

299-7 

2974 

295-1 

292.9 

290.6 

288.4 

286.1 

2760 

317.5 

312.6 

307.8 

303.1 

300.8 

298.5 

296.2 

293-9 

291.7 

289.4 

287.2 

2770 

3i8.7 

3I3-7 

308.9 

304.2 

301.9 

299.6 

297.3 

295.0 

292.7 

290.5 

288.2 

2780 

319.8 

314.8 

310.0 

305.3 

303.0 

300.6 

298.3 

296.1 

293.8 

291-5 

289.2 

2790 

321.0 

316.0 

311.1 

3064 

304.1 

301.7 

299-4 

297.1 

294.8 

292.5 

290.3 

2800 

322.1 

3i7.i 

312.3 

307.5 

305-1 

302.8 

300.5 

298.2 

295-9 

293.6 

291.3 

2810 

323.3 

318.2 

3134 

308.6 

306.2 

303-9 

301.6 

299.2 

296.9 

294.6 

292.4 

2820 

3244 

3194 

314.5 

309-7 

307-3 

305-0 

302.6 

300.3 

298.0 

295.7 

2934 

2830 

325-6 

320.5 

315.6 

310.8 

308.4 

306.1 

303-7 

301.4 

299.0 

296.7 

294.4 

2840 

326.7 

321.6 

316.7 

3II-9 

309.5 

307.1 

304-8 

302.4 

300.1 

297-8 

295-5 

2850 

327-9 

322.8 

317.8 

313-0 

310.6 

308.2 

305-9 

303.5 

301.2 

298.8 

296.5 

2860 

329.0 

323.9 

3i8.9 

3H.I 

3H.7 

309-3 

306.9 

304.6 

302.2 

299.9 

297.6 

2870 

330.2 

325.0 

320.1 

315.2 

312.8 

310.4 

308.0 

305-6 

303-3 

300.9 

298.6 

2880 

331-3 

326.1 

321.2 

316.3 

313.9 

3H-5 

309.1 

306.7 

304.3 

302.0 

299.6 

2890 

332.5 

327.3 

322.3 

3J74 

314.9 

312.5 

310.1 

307.8 

3054 

303-0 

300.7 

2900 

333-6 

328.4 

3234 

318.4 

316.0 

3I3-6 

311.2 

308.8 

306.4 

304.1 

301.7 

2910 

334-8 

329-5 

324-5 

3I9.5 

3i7.i 

3I4-7 

312.3 

309.9- 

307.5 

305-1 

302.8 

2920 

335-9 

330-7 

325-6 

320.6 

318.2 

315-8 

3134 

311.0 

308.6 

306.2 

303-8 

2930 

337-1 

33L8 

326.7 

321.7 

3I9-3 

316.9 

3144 

312.0' 

309-6 

307.2 

304.8 

2940 

338.2 

332.9 

327-9 

322.8 

320.4 

317.9 

315.5 

3I3.I 

310.7 

308.3 

305-9 

2950 

339-4 

334-1 

329.0 

323-9 

321.5 

319.0 

316.6 

3U.2 

3H-7 

309-3 

306.9 

2960 

340-5 

335.2 

33o.i 

325-0 

322.6 

320.1 

317.7 

315-2 

312.8 

310.4 

308.0 

2970 

34L7 

336.3 

331.2 

326.1 

323-7 

321.2 

318.7 

3i6.3 

313-8 

3"4 

309.0 

2980 

342.8 

337-5 

332-3 

327-2 

324.7 

322.3 

3I9-8 

317.3 

314.9 

312.5 

310.0 

2990 

344.0 

338.6 

3334 

328.3 

325-8 

323-3 

320.9 

318.4 

315.9 

3I3-5 

311.1 

3000 

345-1 

339-7 

334-5 

3294 

326.9 

324-4 

321.9 

319.5 

317.0 

314.6 

312.1 

SMITHSONIAN  TABLES. 


88 


TABLE  17. 
REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 

Z  (i— j8) 


Values   of   2000  X  m. 


1 8444+67. 536+ .003Z 


Altitude 
in 
metres. 
Z. 

MEAN  TEMPERATURE  OF  AIR  COLUMN  IN  CENTIGRADE  DEGREES   (0). 

+  12° 

+  14° 

+  16° 

+  18° 

+  20° 

+  22° 

+  24° 

+  26° 

+  28° 

+  32° 

+  36° 

2500 

258.1 

256.2 

254.2 

252.3 

250.4 

248.5 

246.7 

244.9 

243.1 

239.6 

236.2 

2510 

259.2 

257.2 

255-2 

253-3 

251-4 

249-5 

247.7 

245.9 

244.1 

240.6 

237.1 

2520 

260.2 

258.2 

256.2 

254.3 

252.4 

250.5 

248.7 

246.8 

245.0 

241.5 

238.0 

2530 

261.2 

259.2 

257.3 

255-3 

253-4 

251-5 

249-7 

247-8 

246.0 

242.5 

239.0 

2540 

262.3 

260.3 

258.3 

256.3 

254-4 

252-5 

250.6 

248.8 

247.0 

2434 

239-9 

2550 

263.3 

261.3 

259-3 

257.3 

2554 

253-5 

251.6 

249.8 

247.9 

244-4 

240.9 

2560 

264.3 

262.3 

260.3 

258.4 

256.4 

254-5 

252.6 

250.7 

248.9 

245.3 

-241.8 

2570 

265.4 

263.3 

261.3 

2594 

2574 

255-5 

253-6 

251-7 

249-9 

246.3 

242.8 

2580 

266.4 

264.4 

262.3 

260.4 

258.4 

256.5 

254-6 

252.7 

250.9 

247-3 

243.7 

2590 

267.4 

265.4 

263.4 

261.4 

259-4 

257.5 

255-6 

2537 

251-8 

248.2 

2447 

2600 

268.5 

266.4 

264.4 

262.4 

260.4 

258.5 

256.6 

254.7 

252.8 

249.2 

245-6 

2610 

269.5 

267.4 

265.4 

263.4 

261.4 

259-5 

257.5 

255.6 

253-8 

250.1 

246.5 

2620 

270.5 

268.5 

266.4 

264.4 

262.4 

260.5 

258.5 

256.6 

254-8 

251.1 

247-5 

2630 

271.6 

269.5 

267.4 

265.4 

263.4 

261.5 

259-5 

257.6 

255-7 

252.0 

248.4 

2640 

272.6 

270.5 

268.4 

266.4 

264.4 

262.5 

260.5 

258.6 

256.7 

253.0 

249.4 

2650 

273.6 

271.5 

269.5 

267.4 

265.4 

263.4 

261.5 

259.6 

257.7 

254-0 

250.3 

2660 

274.7 

272.6 

270.5 

268.4 

266.4 

264.4 

262.5 

260.5 

258.6 

254.9 

251-3 

2670 

275-7 

273.6 

271-5 

269.4 

267.4 

265.4 

263.5 

261.5 

259.6 

255-9 

252.2 

2680 

276.7 

274.6 

272.5 

270.5 

268.4 

266.4 

264.4 

262.5 

260.6 

256.8 

253-1 

2690 

277.7 

275.6 

273-5 

271-5 

269.4 

267.4 

265.4 

263.5 

261.6 

257.8 

254.1 

2700 

278.8 

276.6 

274.5 

272.5 

270.4 

268.4 

266.4 

264.5 

262.5 

258.8 

255-0 

2710 

279.8 

277-7 

275.6 

273.5 

271.4 

269.4 

267.4 

265.4 

263.5 

259-7 

256.0 

2720 

280.8 

278.7 

276.6 

274.5 

272.4 

270.4 

268.4 

266.4 

264.5 

260.7 

256.9 

2730 

281.9 

279.7 

277.6 

275.5 

2734 

271.4 

269.4 

267.4 

265.4 

261.6 

257-9 

2740 

282.9 

280.7 

278.6 

276.5 

274.4 

272.4 

270.4 

268.4 

266.4 

262.6 

258.8 

2750 

283.9 

281.8 

279.6 

277-5 

275-4 

273-4 

271.4 

269.4 

267.4 

263-5 

259.8 

2760 

285.0 

282.8 

280.6 

278.5 

276.4 

2744 

272.3 

270.3 

268.4 

264.5 

260.7 

2770 

286.0 

283.8 

281.7 

279-5 

277-4 

275-4 

273.3 

271.3 

269.3 

265.5 

261.6 

2780 

287.0 

284.8 

282.7 

280.5 

278.4 

276.4 

274.3 

272.3 

2/0.3 

266.4 

262.6 

2790 

288.1 

285.9 

283.7 

281.5 

279-4 

2774 

275.3 

273.3 

271.3 

267.4 

263.5 

2800 

289.1 

286.9 

284.7 

282.6 

280.4 

278.3 

276.3 

274.3 

272.2 

268.3 

264.5 

2810 

290.1 

287.9 

285.7 

283.6 

281.4 

279.3 

277-3 

275.2 

273.2 

269.3 

265.4 

2820 

291.2 

288.9 

286.7 

284.6 

282.4 

280.3 

278.3 

276.2 

274.2 

270.3 

266.4 

2830 

292.2 

290.0 

287.8 

285.6 

283.4 

281.3 

279.2 

277.2 

275-2 

271.2 

267.3 

2840 

293.2 

291.0 

288.8 

286.6 

284.4 

282.3 

280.2 

278.2 

276.1 

272.2 

268.3 

2850 

294-3 

292.0 

289.8 

287.6 

285.4 

283.3 

281.2 

279.2 

277.1 

273.1 

269.2 

2860 

295.3 

293.0 

290.8 

288.6 

286.4 

284.3 

282.2 

280.1 

278.1 

274.1 

270.1 

2870 

296.3 

294.1 

291.8 

289.6 

287.4 

285.3 

283.2 

281.1 

279.0 

275.0 

271.1 

2880 

2974 

295-1 

292.8 

290.6 

288.4 

286.3 

284.2 

282.1 

280.0 

276.0 

272.0 

2890 

298.4 

296.1 

293.8 

291.6 

289.4 

287.3 

285.2 

283.1 

281.0 

277.0 

273.0 

2900 

299-4 

297.1 

294.9 

292.6 

290.4 

288.3 

286.2 

284.1 

282.0 

277-9 

273-9 

2910 

300.4 

298.1 

295.9 

293.7 

291.5 

289.3 

287.1 

285.0 

282.9 

278.9 

274-9 

2920 

301.5 

299.2 

296.9 

294.7 

292.5 

290.3 

288.1 

286.0 

283.9 

279.8 

275-8 

2930 

302.5 

300.2 

297.9 

295-7 

293-5 

291.3 

289.1 

287.0 

284.9 

280.8 

276.8 

2940 

303-5 

301.2 

298.9 

296.7 

294-5 

292.3 

290.1 

288.0 

285.9 

281.8 

277.7 

2950 

304.6 

302.2 

299.9 

297-7 

295-5 

293-3 

291.1 

289.0 

286.8 

282.7 

278.6 

2960 

305-6 

303-3 

301.0 

298.7 

296.5 

294.2 

292.1 

289.9 

287.8 

283.7 

279.6 

2970 

306.6 

304-3 

302.0 

299.7 

297.5 

295-2 

293.1 

290.9 

288.8 

284.6 

280.5 

2980 

307-7 

305-3 

303-0 

300.7 

298.5 

296.2 

294.0 

291.9 

289.7 

285.6 

•281.5 

2990 

308.7 

306.3 

304-0 

301.7 

299.5 

297.2 

295.0 

292.9 

290.7 

286.5 

282.4 

3000 

3097 

3074 

305.0 

302.7 

300.5 

298.2 

296.0 

293.8 

291.7 

287.5 

283.4 

SMITHSONIAN  TABLES. 


89 


TABLE  18. 

REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 
Correction   of   2000m  for   Latitude:    2000  mx  0.002662  cos  2 <f>. 

For  latitudes  o°  to  45°,  the  correction  is  to  be  subtracted. 
For  latitudes  45°  to  90°,  the  correction  is  to  be  added. 


LATITUDE. 

2000  m. 

0° 

5° 

10° 

15° 

20° 

25° 

30° 

35° 

40° 

45° 

10 

0.0 

0.0 

0.0 

0.0 

0.0 

0.0 

o.o 

o.o 

o.o 

0.0 

20 

O.I 

O.I 

O.I 

o.o 

0.0 

0.0 

0.0 

0.0 

o.o 

o.o 

30 

O.I 

O.I 

O.I 

O.I 

O.I 

O.I 

o.o 

0.0 

0.0 

0.0 

40 

O.I 

O.I 

O.I 

O.I 

O.I 

O.I 

O.I 

0.0 

0.0 

o.o 

50 

O.I 

O.I 

O.I 

O.I 

O.I 

O.I 

O.I 

0.0 

0.0 

0.0 

60 

O.2 

0.2 

0.2 

O.I 

O.I 

O.I 

O.I 

O.I 

0.0 

0.0 

70 

0.2 

0.2 

0.2 

0.2 

O.I 

O.I 

O.I 

O.I 

o.o 

0.0 

80 

0.2 

O.2 

0.2 

O.2 

0.2 

O.I 

O.I 

O.I 

0.0 

o.o 

90 

0.2 

0.2 

0.2 

0.2 

0.2 

0.2 

O.I 

O.I 

0.0 

0.0 

IOO 

0-3 

0-3 

°-3 

0.2 

0.2 

O.2 

O.I 

O.I 

o.o 

o.o 

no 

0-3 

0-3 

0-3 

0-3 

0.2 

0.2 

O.I 

O.I 

O.I 

0.0 

120 

0-3 

0.3 

0-3 

0-3 

0.2 

0.2 

0.2 

O.I 

O.I 

0.0 

I30 

-    0.3 

o-3 

0-3 

0-3 

0-3 

O.2 

0.2 

O.I 

O.I 

0.0 

140 

0.4 

0.4 

0.4 

0-3 

o-3 

0.2 

0.2 

O.I 

O.I 

0.0 

150 

0.4 

0.4 

0.4 

0-3 

0.3 

0-3 

0.2 

O.I 

O.I 

0.0 

160 

0.4 

0.4 

0.4 

0.4 

0.3 

0-3 

0.2 

O.I 

O.I 

0.0 

170 

0-5 

0.4 

0.4 

0.4 

o-3 

0.3 

0.2 

0.2 

O.I 

0.0 

180 

0-5 

0.5 

0.5 

0.4 

0.4 

0-3 

O.2 

0.2 

O.I 

o.o 

190 

0.5 

0.5 

0-5 

0.4 

0.4 

0-3 

0-3 

O.2 

O.I 

0.0 

200 

0-5 

0.5 

0-5 

0.5 

0.4 

o-3 

0-3 

0.2 

O.I 

o.o 

2IO 

0.6 

0.6 

0-5 

0.5 

0.4 

0.4 

0-3 

O.2 

O.I 

0.0 

220 

0.6 

0.6 

0.6 

0.5 

0.4 

0.4 

0-3 

0.2 

O.I 

o.o 

230 

0.6 

0.6 

0.6 

0.5 

0-5 

0.4 

0-3 

0.2 

O.I 

0.0 

24O 

0.6 

0.6 

0.6 

0.6 

0.5 

0.4 

0-3 

O.2 

O.I 

0.0 

250 

0.7 

0.7 

0.6 

0.6 

o-5 

0.4 

0-3 

0.2 

O.I 

0.0 

260 

0.7 

0.7 

0.7 

0.6 

o.5 

0.4 

0-3 

0.2 

O.I 

o.o 

270 

0.7 

0.7 

0.7 

0.6 

0.6 

0.5 

0.4 

0.2 

O.I 

0.0 

280 

0.7 

0.7 

0.7 

0.6 

0.6 

0-5 

0.4 

0-3 

O.I 

0.0 

290 

0.8 

0.8 

0.7 

0.7 

0.6 

0.5 

0.4 

0-3 

O.I 

0.0 

300 

0.8 

0.8 

0.8 

0.7 

0.6 

0-5 

0.4 

0-3 

O.I 

0.0 

310 

0.8 

0.8 

0.8 

0.7 

0.6 

0-5 

0.4 

0-3 

O.I 

0.0 

320 

0.9 

0.8 

0.8 

0.7 

0.7 

0-5 

0.4 

0-3 

O.I 

0.0 

330 

0.9 

0.9 

0.8 

0.8 

o.7 

0.6 

0.4 

0-3 

0.2 

0.0 

340 

0.9 

0.9 

0.9 

0.8 

0.7 

0.6 

0-5 

0-3 

0.2 

0.0 

350 

0.9 

0.9 

0.9 

0.8 

0.7 

0.6 

0-5 

0-3 

0.2 

0.0 

90° 

85° 

80° 

75° 

70° 

65° 

60° 

55° 

50° 

45° 

SMITHSONIAN  TABLES. 


TABLE  19. 


REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 
B0-B=B(10/W-1). 

Top  argument :     Height  of  the  barometer  (B). 

Side  argument :     Values  of  2000  m  obtained  from  Table  17. 


2000m. 

HEIGHT  OF  THE  BAROMETER  IN  MILLIMETRES. 

790 

780 

770 

760 

750 

740 

730 

720 

710 

700 

690 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

1 

0.9 

0.9 

0.9 

0.9 

0.9 

0.9 

0.8 

0.8 

0.8 

0.8 

0.8 

2 

1.8 

1.8 

1.8 

1.8 

1-7 

1-7 

1.7 

1.7 

1.6 

1.6 

1.6 

3 

2.7 

2.7 

2.7 

2.6 

2.6 

2.6 

2-5 

2.5 

2.5 

2.4 

2.4 

4 

3-6 

3.6 

3-6 

3-5 

3.5 

3-4 

3-4 

3-3 

3-3 

3-2 

3-2 

5 

4-6 

4.5 

4-4 

4.4 

4-3 

4.3 

4.2 

4.2 

4.1 

4.0 

4.0 

6 

5-5 

5-4 

5-3 

5-3 

5.2 

5-i 

5-1 

5-0 

4-9 

4.9 

4.8 

7 

6.4 

6-3 

6.2 

6.1 

6.1 

6.0 

5.9 

5-8 

5-7 

5.7 

5.6 

8 

7.3 

7.2 

7.1 

7.0 

6.9 

6.8 

6.8 

6.7 

6.6 

6.5 

6.4 

9 

8.2 

8.1 

8.0 

7.9 

7-8 

7.7 

7-6 

7-5 

7.4 

7-3 

7.2 

10 

9-1 

9.0 

8.9 

8.8 

8.7 

8.6 

8.5 

8-3 

8.2 

8.1 

8.0 

ii 

10.  1 

9«9 

9.8 

9-7 

9.6 

9-4 

9-3 

9.2 

9.0 

8-9 

8.8 

12 

II.  0 

10.9 

10.7 

10.6 

10.4 

10.3 

10.2 

10.  0 

9-9 

9-7 

9.6 

13 

"i 

ii.  8 

n.6 

ii.S 

ii.3 

II.  2 

II.  0 

10.9 

10.7 

10.6 

10.4 

14 

12.8 

12.7 

12.5 

12.3 

12.2 

I2.O 

II.9 

11.7 

ii-5 

11.4 

II.  2 

15 

13.8 

13.6 

13.4 

13.2 

I3.I 

I2.9 

12.7 

12.5 

12.4 

12.2 

12.0 

16 

14.7 

14.5 

14.3 

14.1 

13.9 

13.8 

13.6 

13.4 

13.2 

13.0 

12.8 

17 

15.6 

15.4 

15.2 

15.0 

14.8 

14.6 

14.4 

14.2 

14.0 

13.8 

13-6 

18 

16.5 

16.3 

16.1 

15-9 

15.7 

15-5 

15-3 

15-1 

14.9 

14.7 

14.4 

19 

17.5 

17.3 

17.0 

16.8 

16.6 

16.4 

16.1 

15.9 

15.7 

15-5 

15.3 

20 

18.4 

18.2 

17.9 

17.7 

17-5 

17.2 

17.0 

16.8 

16.5 

l6-3 

16.1 

21 

19.3 

19.1 

18.8 

18.6 

18.4 

18.1 

17.9 

17.6 

17.4 

I7.I 

16.9 

22 

20.0 

19.8 

19.5 

19.2 

19.0 

18.7 

18.5 

18.2 

18.0 

17.7 

23 

2O.9 

20.7 

20.4 

20.1 

19.9 

19.6 

19.3 

19.1 

18.8 

18.5 

24 

21.9 

21.6 

21.3 

21.0 

20.7 

20.5 

20.  2 

19.9 

19.6 

19-3 

25 

22.8 

22.5 

22.2 

21.9 

21.6 

21.3 

21.0 

20.7 

20.4 

20.  i 

26 

23-7 

23-4 

23.1 

22.8 

22.5 

22.2 

21.9 

21.6 

21.3 

21.  0 

27 

24.6 

24-3 

24.0 

23.7 

23.4 

23.0 

22.7 

22.4 

22.1 

21.8 

28 

25.6 

25.2 

24.9 

24.6 

24.2 

23-9 

23-6 

23.3 

22.9 

22.6 

29 

26.5 

26.1 

25.8 

25.5 

25.1 

24.8 

24.4 

24.1 

23-8 

234 

30 

27.4 

27.1 

26.7 

26.4 

26.0 

25.7 

25.3 

25.0 

24.6 

24.2 

31 

28.3 

28.0 

27.6 

27.3 

26.9 

26.5 

26.2 

25.8 

25-4 

25-1 

32 

29.3 

28.9 

28.5 

28.1 

27.8 

27.4 

27.0 

26.6 

26.3 

25.9 

33 

30.2 

29.8 

29.4 

29.0 

28.7 

28.3 

27.9 

27.5 

27.1 

26.7 

34 

30.7 

30-3 

29.9 

29.5 

29.I 

28.7 

28.3 

27.9 

27.5 

35 

31-7 

31.2 

30.8 

30.4 

30.0 

29.6 

29.2 

28.8 

28.4 

36 

32-6 

32.2 

31.7 

31.3 

30-9 

30.5 

30.0 

29.6 

29.2 

37 

33-5 

33-1 

32.6 

32.2 

31-8 

31.3 

30-9 

30-5 

30.0 

38 

34-4 

34-o 

33-5 

33.1 

32.6 

32.2 

31.8 

31-3 

30.9 

39 

35-4 

34-9 

344 

34.0 

33.5 

33-i 

32.6 

32.1 

3L7 

40 

36.3 

35-8 

35-3 

34.9 

34-4 

33.9 

33-5 

33.° 

32.5 

SMITHSONIAN  TABLES. 


TABLE  19. 

REDUCTION 


OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 

B0-B=B  (10W-1). 

Top  argument  :     Height  of  the  barometer  (B). 
Side  argument:     Values  of  2000  m  obtained  from  Table  17. 


2000  m, 

HEIGHT  OF  THE  BAROMETER  IN  MILLIMETRES. 

760 

750 

740 

730 

720 

710 

700 

690 

680 

670 

660 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

40 

35-8 

35-3 

34-9 

34.4 

33-9 

33-5 

33-0 

32.5 

32.0 

31.6 

3I.I 

4i 

36.7 

36.3 

35-8 

35-3 

34-8 

34-3 

33-8 

33-4 

32.9 

32.4 

31-9 

42 

37-7 

37-2 

36.7 

36.2 

35-7 

35-2 

34-7 

34-2 

33-7 

33-2 

32.7 

43 

38.6 

38.1 

37-6 

37-0 

36.5 

36.0 

35-5 

35-0 

34-5 

34-o 

33-5 

44 

39-5 

39-° 

38.5 

37-9 

374 

36-9 

36.4 

35-9 

35-3 

34-8 

34-3 

45 

40.4 

39-9 

39-3 

38.8 

38.3 

37.8 

37-2 

36.7 

36.2 

35-6 

35.1 

46 

41.3 

40.8 

40.2 

39-7 

39-2 

38.6 

38.1 

37-5 

37-0 

36.4 

35-9 

47 

42.3 

41.7 

41.1 

40.6 

40.0 

39-5 

38.9 

38.4 

37.8 

37-3 

36.7 

48 

43-2 

42.6 

42.0 

41-5 

40.9 

40-3 

39-8 

39-2 

38.6 

38.1 

37-5 

49 

44.1 

43-5 

42.9 

42.4 

41.8 

41.2 

40.6 

40.0 

39-5 

33.9 

38.3 

50 

45-0 

444 

43-8 

43-3 

42.7 

42.1 

4L5 

40.9 

40-3 

39-7 

39-1 

5i 

46.0 

45-4 

44.8 

44.1 

43-5 

42-9 

42.3 

41.7 

41.1 

40-5 

39-9 

52 

46.9 

46.3 

45-7 

45.o 

44-4 

43-8 

43-2 

42.6 

42.0 

4L3 

40.7 

53 

47-8 

47-2 

46.6 

45-9 

45-3 

44-7 

44.0 

43-4 

42.8 

42.2 

4L5 

54 

48.7 

48.1 

47-5 

46.8 

46.2 

45-5 

44-9 

44-3 

43-6 

43-o 

42.3 

55 

49-7 

49.0 

48.4 

47-7 

47-1 

46.4 

45-8 

45.i 

44-5 

43-8 

43-i 

56 

50.6 

49-9 

49-3 

48.6 

47-9 

47-3 

46.6 

46.0 

45-3 

44-6 

44.0 

57 

51-5 

50-9 

50.2 

49-5 

48.8 

48.2 

47-5 

46.8 

46.1 

45-4 

44-8 

58 

52.5 

51-8 

5I-I 

50-4 

49-7 

49.0 

48.3 

47.6 

47.0 

46.3 

45.6 

59 

53-4 

52.7 

52.0 

51-3 

50.6 

49-9 

49.2 

48.5 

47-8 

47-1 

46.4 

60 

53-6 

52.9 

52.2 

5L5 

50.8 

50.1 

49-3 

48.6 

47-9 

47.2 

61 

54-6 

53-8 

53-i 

52-4 

51-7 

50.9 

50.2 

49.5 

48.7 

48.0 

62 

55-5 

54-8 

54-0 

53-3 

52.5 

51-8 

51-1 

50-3 

49.6 

48.8 

63 

56.4 

55-7 

54-9 

54-2 

534 

52.7 

51-9 

51-2 

50-4 

49-6 

64 

57-3 

56.6 

55-8 

55-1 

54-3 

53-5 

52.8 

52.0 

51.2 

50.5 

65 

58.3 

57-5 

56-7 

55-9 

55-2 

54-4 

53.6 

52.8 

52.1 

51.3 

66 

59-2 

58.4 

57-6 

56.8 

56.i 

55-3 

54-5 

53.7 

52.9 

52.1 

67 

60.  i 

59-3 

58.5 

57-7 

56.9 

56.1 

55-3 

54-5 

53.7 

52.9 

68 

60.3 

59-4 

58.6 

57-8 

57-0 

56.2 

554 

54-6 

53-7 

69 

61.2 

60.4 

59.5 

58.7 

57-9 

57-o 

56.2 

55-4 

54-6 

70 

62.1 

61.3 

60.4 

59-6 

58.7 

57-9 

57-1 

56.2 

55-4 

7i 

63.0 

62.2 

61.3 

60.5 

59-6 

58.8 

57-9 

57-1 

56.2 

72 

64.0 

63.1 

62.2 

61.4 

60.5 

59-6 

58.8 

57.9 

57-0 

73 

64.9 

64.0 

63.1 

62.3 

61.4 

60.5 

59.6 

58.7 

57.9 

74 

65.8 

64.9 

64.0 

63.1 

62.3 

61.4 

60.5 

59-6 

58.7 

75 

66.7 

65-8 

64.9 

64.0 

63.1 

62.2 

61.3 

60.4 

59-5 

76 

67.7 

66.8 

65-8 

64.9 

64.0 

63.1 

62.2 

61.3 

60.4 

77 

68.6 

67.7 

66.7 

65.8 

64.9 

64.0 

63.0 

62.1 

61.2 

78 

69.5 

68.6 

67.6 

66.7 

65.8 

64.8 

63-9 

63.0 

62.0 

79 

70-5 

69.5 

68.6 

67.6 

66.7 

65.7 

64-7 

63-8 

62.8 

80 

70.4 

69.5 

68.5 

67-5 

66.6 

65.6 

64.6 

63-7 

81 

71.4 

70.4 

69.4 

68.4 

67.4 

66.5 

65.5 

64.5 

82 

72.3 

71-3 

70.3 

69-3 

68.3 

67.3 

66.3 

65.3 

83 

73-2 

72.2 

71.2 

70.2 

69.2 

68.2 

67.2 

66.2 

84 

74.1 

73-1 

72.1 

7I.I 

70.1 

69.0 

68.0 

67.0 

85 

75-0 

74.0 

73-0 

72.0 

70.9 

69.9 

68.9 

67-9 

SMITHSONIAN  TABLES. 


TABLE  19. 

REDUCTION    OF   THE     BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 

Top  argument :     Height  of  the  barometer  (B). 

Side  argument:     Values  of  2000  m  obtained  from  Table  17. 


2000  m. 

HEIGHT  OF  THE  BAROMETER  IN  MILLIMETRES. 

720 

710 

700 

690 

680 

670 

660 

650 

640 

630 

nun. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

80 

69-5 

68.5 

67.5 

66.6 

65-6 

64.6 

63.7 

62.7 

6!.7 

60.8 

81 

70.4 

69.4 

68.4 

67.4 

66.5 

65.5 

64.5 

63.5 

62.6 

61.6 

82 

71-3 

70.3 

69.3 

68.3 

67.3 

66.3 

65.3 

64.4 

63.4 

62.4 

83 

72.2 

71.2 

70.2 

69.2 

68.2 

67.2 

66.2 

65.2 

64.2 

63-2, 

84 

73-1 

72.1 

7I.I 

70.1 

69.0 

68.0 

67.0 

66.0 

65.0 

64.0 

85 

74-o 

73-o 

72.0 

70.9 

69.9 

68.9 

67.9 

66.8 

65.8 

'  64.8 

86 

74-9 

73-9 

72.9 

71.8 

70.8 

69.7 

68.7 

67.7 

66.6 

65.6 

87 

75-9 

74-8 

73-7 

72.7 

71.6 

70.6 

69-5 

68.5 

67.4 

66.4 

88 

76.8 

75-7 

74.6 

73-6 

72.5 

71.4 

70.4 

69-3 

68.2 

67.2 

89 

77-7 

76.6 

75-5 

74-5 

73-4 

72.3 

71.2 

70.1 

69.1 

68.0 

90 

78.6 

77-5 

76.4 

75-3 

74.2 

73-1 

72.1 

71.0 

69.9 

68.8 

91 

79-5 

78.4 

77-3 

76.2 

75-1 

74.0 

72.9 

71.8 

70.7 

69.6 

92 

80.4 

79-3 

78.2 

77.1 

76.0 

74-9 

73-7 

72.6 

71.5 

70.4 

93 

81.4 

80.2 

79.1 

78.0 

76.8 

75-7 

74.6 

73-5 

72.3 

71.2 

94 

82.3 

Si.  i 

80.0 

78.9 

77-7 

76.6 

75-4 

74-3 

73-1 

72.0 

95 

83-2 

82.1 

80.9 

79-7 

78.6 

77-4 

76.3 

75-i 

74.0 

72.8 

96 

84.1 

83.0 

81.8 

80.6 

79-5 

78.3 

77.1 

76.0 

74.8 

73-6 

97 

85.1 

83-9 

82.7 

81.5 

80.3 

79-2 

78.0 

76.8 

75-6 

74-4 

98 

86.0 

84.8 

83.6 

82.4 

81.2 

80.0 

78.8 

77.6 

76.4 

75-2 

99 

86.9 

85.7 

84-5 

83.3 

82.1 

80.9 

79.7 

78.5 

77-3 

76.! 

100 

87-9 

86.6 

85-4 

84.2 

83.0 

81.8 

80.5 

79-3 

78.1 

76.9 

IOI 

88.8 

87.6 

86.3 

85-1 

83-9 

82.6 

81.4 

80.2 

78.9 

77-7 

IO2 

89.7 

88.5 

87.2 

86.0 

84.7 

83-5 

82.2 

81.0 

79-7 

78.5 

103 

90.6 

89.4 

88.1 

86.9 

85-6 

84.4 

83.1 

81.8 

80.6 

79-3 

104 

90.3 

89.0 

87.8 

86.5 

85.2 

84.0 

82.7 

81.4 

80.  i 

105 

91.2 

89.9 

88.7 

87.4 

86.1 

84.8 

83.5 

82.2 

81.0 

106 

92.2 

90.9 

89.6 

88.3 

87.0 

85.7 

84.4 

83-1 

81.8 

107 

93-1 

91.8 

90-5 

89.1 

87.8 

86.5 

85.2 

83.9 

82.6 

108 

94.0 

92.7 

91.4 

90.0 

88.7 

87.4 

86.1 

84.7 

83-4 

109 

94-9 

93-6 

92.3 

90.9 

89.6 

88.2 

86.9 

85.6 

84.2 

110 

95-9 

94-5 

93-2 

91.8 

90.5 

89.1 

87.8 

86.4 

85.1 

in 

96.8 

95-4 

94.1 

92.7 

9i-3 

90.0 

88.6 

87.2 

85.9 

112 

97-7 

96.3 

95-0 

93-6 

92.2 

90.8 

89.5 

88.1 

86.7 

H3 

98.6 

97-3 

95-9 

94-5 

93-1 

91.7 

9°-3 

88.9 

87-5 

114 

99.6 

98.2 

96.8 

95-4 

94.0 

92.6 

91.2 

89.8 

88.4 

115 

100.5 

99.1 

97-7 

96.3 

94.8 

93-4 

92.0 

90.6 

89.2 

116 

100.0 

98.6 

97-2 

95-7 

94.3 

92.9 

91.4 

90.0 

117 

100.9 

99-5 

98.1 

96.6 

95.2 

93.7 

92.3 

90.8 

118 

101.9 

100.4 

98.9 

97-5 

96.0 

94.6 

93-i 

91.7 

119 

102.8 

101.3 

99.8 

98.4 

96.9 

95-4 

94.0 

92.5 

120 

103.7 

102.2 

100.7 

99-3 

97.8 

96.3 

94-8 

93-3 

121 

104.6 

I03.I 

101.  6 

100.  1 

98.7 

97-2 

95-7 

94-2 

122 

105.6 

IO4.I 

102.5 

IOI.O 

99-5 

98.0 

96.5 

95.o 

I23 

106.5 

105.0 

103.4 

101.9 

100.4 

98.9 

97-4 

95-8 

124 

107.4 

105-9 

104.3 

102.8 

101.3 

99-7 

98.2 

96.7 

125 

108.3 

106.8 

105-3 

103.7 

102.2 

100.6 

99.1 

97-5 

SMITHSONIAN  TABLES. 


93 


OF  THE 


TABLE  19. 


REDUCTION 


OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 


Top  argument  : 
Side  argument: 


Height  of  the  barometer  (B). 

Values  of  2000  m  obtained  from  Table  17. 


2000  m. 

HEIGHT  OF  THE  BAROMETER  IN  MIIvUMETRES. 

690 

680 

670 

660 

650 

640 

630 

620 

610 

600 

1  25 

mm. 
106.8 

mm. 
105-3 

mm. 
103.7 

mm. 

102.2 

mm. 
100.6 

mm. 
99.1 

mm. 
97-5 

mm. 
96.0 

mm. 

94.4 

mm. 

92.9 

126 

107.7 

106.2 

104.6 

103.0 

101.5 

99-9 

98.4 

96.8 

95.2 

93-7 

127 

108.6 

107.1 

105-5 

103.9 

102.3 

100.8 

99.2 

97.6 

96.0 

94.5 

128 

109.6 

108.0 

106.4 

104.8 

103.2 

101.6 

100.0 

98.4 

96.9 

95.3 

129 

H0.5 

108.9 

107.3 

105.7 

104.1 

102.5 

100.9 

99-3 

97.7 

96.1 

130 

III.4 

109.8 

108.2 

106.6 

104.9 

103.3 

101.7 

IOO.I 

98.5 

96.9 

131 

112.3 

110.7 

109.1 

107.4 

105.8 

104.2 

IO2.6 

100.9 

99.3 

97.7 

132 

113.2 

in.  6 

IIO.O 

108.3 

106.7 

105.0 

103.4 

101.8 

IOO.I 

98.5 

133 

114.2 

112.5 

110.9 

109.2 

107.6 

105-9 

104.2 

102.6 

100.9 

99.3 

134 

II5.I 

H3.4 

in.  8 

1  10.  1 

108.4 

106.8 

105.1 

103.4 

101.8 

IOO.I 

135    ' 

116.0 

II4-3 

112.7 

III.O 

109.3 

107.6 

105.9 

104.3 

102.6 

100.9 

136 

117.0 

115-3 

113.6 

111.9 

1  10.  2 

108.5 

106.8 

105.1 

103.4 

101.7 

137 

117.9 

116.2 

H4.5 

II2.8 

III.  I 

109.3 

107.6 

105-9 

104.2 

102.5 

138 

118.8 

117.1 

1154 

113.6 

III-9 

II0.2  * 

108.5 

106.8 

105.0 

103.3 

139 

119.7 

118.0 

116.3 

114.5 

II2.8 

III.  I 

109.3 

107.6 

105.9 

104.1 

140 

120.7 

118.9 

117.2 

115.4 

II3-7 

III.9 

1  10.  2 

108.4 

106.7 

104.9 

141 

121.  6 

119.9 

118.1 

116.3 

II4.6 

II2.8 

III.O 

109.3 

107.5 

105.8 

142 

120.8 

119.0 

117.2 

H5.4 

II3-7 

III.9 

1  10.  1 

108.3 

106.6 

143 

121.  7 

119.9 

118.1 

II6.3 

H4.5 

112.7 

III.O 

109.2 

107.4 

144 

122.6 

120.8 

119.0 

II7.2 

H5.4 

II3.6 

in.  8 

IIO.O 

108.2 

145 

123.5 

121.7 

119.9 

118.1 

II6.3 

II4-5 

112.  6 

1  10.  8 

109.0 

146 

124.5 

122.6 

120.8 

119.0 

II7.I 

H5.3 

113.5 

111.7 

109.8 

147 

125.4 

123.6 

121.7 

119.9 

IlS.O 

116.2 

114.3 

112.5 

1  10.  6 

148 

126.3 

124.5 

122.6 

120.7 

II8.9 

117.0 

115.2 

113.3 

111.5 

149 

127.3 

125.4 

123.5 

121.  6 

II9.8 

117.9 

116.0 

114.2 

112.3 

150 

128.2 

126.3 

124.4 

122.5 

120.6 

118.8 

116.9 

115.0 

113-1 

151 

129.1 

127.2 

125.3 

123.4 

121.5 

119.6 

1-17.7 

115.8 

H3.9 

152 

130.0 

128.1 

126.2 

124.3 

122.4 

120.5 

118.6 

116.7 

114.7 

153 

131.0 

129.1 

127.1 

125.2 

123.3 

121.3 

119.4 

117.5 

115.6 

154 

130.0 

128.0 

126.1 

124.2 

122.2 

120.3 

118.3 

116.4 

155 

130.9 

128.9 

127.0 

125.0 

I23.I 

121.  1 

119.2 

117.2 

156 

131.8 

129.8 

127.9 

125.9 

123.9 

122.  0 

I2O.O 

118.0 

157 

132.7 

130.8 

128.8 

126.8 

124.8 

122.8 

120.9 

118.9 

158 

133.7 

131.7 

129.7 

127.7 

125.7 

123.7 

121.7 

119.7 

159 

134.6 

132.6 

130.6 

128.6 

126.6 

124.5 

122.5 

120.5 

160 

135.5 

133.5 

131.5 

129.4 

127.4 

125.4 

123.4 

121.4 

161 

136.4 

134.4 

132.4 

130.3 

128.3 

126.3 

124.2 

122.2 

162 

137.4 

135.3 

133.3 

131.2 

129.2 

127.1 

125.1 

123.0 

163 

138.3 

136.2 

134.2 

132.1 

130.0 

128.0 

125.9 

123.9 

164 

139.2 

137.2 

135.1 

133.0 

130.9 

128.8 

126.8 

124.7 

165 

140.2 

138.1 

136.0 

133.9 

I3T.8 

129.7 

127.6 

125.5 

166 

141.1 

139.0 

136.9 

134.8 

132.7 

130.6 

128.5 

126.4 

167 

142.0 

139.9 

137.8 

135.7 

133-6 

ISM 

129.3 

127.2 

168 

140.8 

138.7 

136.6 

134-4 

132.3 

130.2 

128.0 

169 

141.8 

139.6 

137.5 

135.3 

133.2 

131.0 

128.9 

170 

142.7 

140.5 

138.4 

136.2 

134.0 

131.9 

129.7 

SMITHSONIAN  TABLES. 


94 


REDUCTION    OF   THE    BAROMETER    TO    SEA 

METRIC    MEASURES. 
B0-B=B(10W-1). 

Top  argument :     Height  of  the  barometer  (B). 

Side  argument :     Values  of  2000  m  obtained  from  Table  17. 


TABLE 
LEVEL. 


19. 


2000  m. 

HEIGHT  OF  THE  BAROMETER  IN  MH,IyIMETRES. 

650 

640 

630 

620 

610 

600 

590 

580 

570 

560 

I70 

mm. 
140.5 

mm. 
138.4 

mm. 
136.2 

mm. 
134.0 

mm. 
I3I.9 

mm. 
129.7 

mm. 
127.5 

mm. 
125.4 

mm. 
123.2 

mm. 
121.  1 

171 

141.4 

139-3 

I37-I 

134-9 

132.7 

130.6 

128.4 

126.2 

124.0 

121.  8 

172 

142.3 

140.2 

138.0 

135-8 

133.6 

I3L4 

129.2 

127.0 

124.8 

122.6 

173 

143-3 

I4I.I 

138.8 

136.6 

134.4 

132.2 

130.0 

127.8 

125.6 

123.4 

174 

144.2 

142.0 

139.7 

137.5 

135-3 

I33.I 

130.9 

128.6 

126.4 

124.2 

175 

I45-I 

142.9 

140.6 

138.4 

136.2 

133-9 

I3L7 

129-5 

127.2 

125.0 

176 

146.0 

143.8 

I4L5 

139-3 

137.0 

134.8 

132.5 

130.3 

128.0 

125.8 

177 

146.9 

144.7 

142.4 

140.1 

137-9 

135.6 

133-4 

I3I.I 

128.8 

126.6 

178 

147.8 

145.6 

143.3 

141.0 

138.7 

136.5 

134.2 

I3L9 

129.6 

127.4 

179 

148.8 

146.5 

144.2 

141.9 

139.6 

137.3 

135.0 

132.7 

130.4 

128.2 

180 

149-7 

147.4 

I45.I 

142.8 

140.5 

138.2 

135-9 

133-6 

I3I.3 

129.0 

181 

150.6 

148.3 

146.0 

143.6 

I4L3 

139.0 

136.7 

134-4 

I32.I 

129.7 

182 

I5I.5 

149.2 

146.9 

144.5 

142.2 

139-9 

137.5 

135-2 

132.9 

130.5 

183 

152.4 

150.1 

147.8 

145-4 

I43.I 

140.7 

138.4 

136.0 

133.7 

I3L3 

184 

153-4 

I5I.O 

148.6 

146.3 

143-9 

141.6 

139.2 

136.8 

134.5 

I32.I 

185 

154.3 

I5I.9 

149-5 

147.2 

144-8 

142.4 

140.0 

137.7 

135.3 

I32.9 

186 

155.2 

152.8 

150.4 

148.1 

145.7 

143-3 

140.9 

138.5 

136.1 

133.7 

187 

156.1 

153-7 

I5I-3 

148.9 

146.5 

144.1 

141.7 

139.3 

136.9 

134-5 

188 

I57-I 

154.7 

152.2 

149.8 

147.4 

145.0 

142.6 

140.2 

137-7 

135-3 

189 

158.0 

155.6 

I53.I 

150.7 

148.3 

145.8 

143-4 

141.0 

138.6 

I36.I 

190 

158.9 

156.5 

154.0 

I5I.6 

149.2 

146.7 

144.3 

I4I.8 

1394 

136.9 

191 

J59-9 

157.4 

154.9 

152.5 

150.0 

147.6 

I45.I 

142.7 

140.2 

137.7 

192 

160.8 

158.3 

155.9 

153.4 

150.9 

148.4 

146.0 

143.5 

I4I.O 

138.5 

193 

161.7 

I59-2 

156.8 

154-3 

I5I.8 

149-3 

146.8 

144.3 

I4I.8 

139-3 

194 

l6o.2 

157.7 

155.2 

152.7 

150.2 

147.7 

145-2 

142.6 

I40.I 

195 

161.1 

158.6 

156.1 

153.5 

I5I.O 

148.5 

146.0 

143-5 

I4I.O 

196 

162.0 

159-5 

156.9 

1544 

I5I.9 

149.4 

146.8 

144-3 

I4I.8 

197 

162.9 

160.4 

157.8 

155.3 

152.8 

150.2 

147-7 

I45.I 

142.6 

198 

163.9 

161.3 

158.7 

156.2 

153.6 

I5I.I 

148.5 

145.9 

143-4 

199 

164.8 

162.2 

159-6 

I57-I 

154.5 

I5I.9 

149-3 

146.8 

144.2 

200 

165.7 

163.1 

160.5 

157-9 

1554 

152.8 

150.2 

147.6 

145.0 

2OI 

166.6 

164.0 

161.4 

158.8 

156.2 

153.6 

I5I.O 

148.4 

145.8 

202 

167.6 

165.0 

162.3 

159.7 

I57.I 

154.5 

I5L9 

149.2 

146.6 

203 

168.5 

165-9 

163.2 

160.6 

158.0 

155.3 

152.7 

3£0.  1 

147.4 

204 

169.4 

166.8 

164.1 

l6l.5 

158.8 

156.2 

153.5 

150.9 

148.3 

205 

170.4 

167.7 

165.0 

162.4 

159.7 

I57.I 

154.4 

I5L7 

I49.I 

206 

I7L3 

168.6 

165.9 

!63-3 

160.6 

157.9 

155.2 

152.6 

149.9 

207 

172.2 

169.5 

166.8 

.  164.2 

161.5 

158.8 

I56.I 

1534 

150.7 

208 

170.5 

167.8 

165.1 

162.3 

159-6 

156.9 

154.2 

I5I.5 

209 

I7I.4 

168.7 

165.9 

163.2 

160.5 

157.8 

I55.I 

152.3 

210 

172.3 

169.6 

166.8 

164.1 

161.4 

158.6 

155-9 

153.2 

211 

173.2 

170.5 

167.7 

165.0 

162.2 

159-5 

156.7 

154.0 

212 

174.2 

I7I.4 

168.6 

165.9 

163.1 

160.3 

157-6 

154.8 

213 

I75.I 

172.3 

169.5 

166.7 

164.0 

161.2 

158.4 

155.6 

214 

176.0 

173.2 

170.4 

167.6 

164.8 

162.0 

159-2 

156.5 

215 

176.9 

I74.I 

I7L3 

168.5 

165.7 

162.9 

160.1 

157-3 

8MITH80KIAN  TABLE*. 


95 


TABLE  19. 


REDUCTION    OF  THE    BAROMETER   TO    SEA   LEVEL. 

METRIC    MEASURES. 
Bo-  B=B  (10^-1). 

Top  argument:     Height  of  the  barometer  (B). 

Side  argument:     Values  of  2000  m  obtained  from  Table  17. 


2000  m. 

HEIGHT  OF  THE  BAROMETER  IN  MILLIMETRES. 

620 

610 

600 

590 

580 

570 

560 

550 

540 

530 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

2I5 

174.1 

I7L3 

168.5 

165.7 

162.9 

160.1 

157-3 

154.5 

I5I.7 

148.9 

216 

175-0 

172.2 

169.4 

166.6 

163-8 

160.9 

158.1 

155-3 

152.5 

149.6 

217 

176.0 

I73-I 

170.3 

167.4 

164.6 

161.8 

158.9 

156.1 

153.3 

150.4. 

218 

176.9 

174.0 

I7I.2 

168.3 

165.5 

162.6 

159-8 

156.9 

I54-I 

I5L2 

219 

177.8 

174.9 

I72.I 

169.2 

166.3 

163.5 

160.6 

157.7 

154-9 

152.0 

220 

178.7 

175.8 

172.9 

I70.I 

167.2 

164.3 

161.4 

158.5 

155.7 

152.8 

221 

179.6 

176.7 

173-8 

170.9 

168.0 

165.1 

162.3 

159-4 

156.5 

153.6 

222 

180.6 

177.6 

174.7 

I7I.8 

168.9 

166.0 

163.1 

160.2 

157-3 

154-3 

223 

181.5 

178.6 

175.6 

172.7 

169.8 

166.8 

163.9 

161.0 

158.1 

I55.I 

224 

182.4 

179.5 

176.5 

173.6 

170.6 

167.7 

164.7 

161.8 

158.9 

155.9 

225 

183.3 

180.4 

177.4 

174-5 

I7L5 

168.5 

165.6 

162.6 

159.7 

156.7 

226 

184.3 

181.3 

178.3 

175-3 

172.4 

169.4 

166.4 

163.4 

160.5 

157.5 

227 

185-2 

182.2 

179.2 

176.2 

173.2 

170.2 

167.3 

164.3 

161.3 

158.3 

228 

I86.I 

183.1 

iSo.I 

I77.I 

I74.I 

171.1 

I68.I 

165.1 

162.1 

159.  1 

229 

187.0 

184.0 

iSl.O 

178.0 

175.0 

172.0 

168.9 

165.9 

162.9 

159-9 

230 

188.0 

184.9 

181.9 

178.9 

175-8 

172.8 

169.8 

166.7 

163.7 

160.7 

231 

188.9 

185.8 

182.8 

179.8 

176.7 

173-7 

170.6 

167.6 

164.5 

161.5 

232 

189.8 

186.8 

183.7 

180.6 

177.6 

174.5 

I7I.5 

168.4 

165.3 

162.3 

233 

190.8 

187.7 

184.6 

181.5 

178.5 

175-4 

172.3 

169.2 

I66.I 

163.1 

234 

191.7 

188.6 

185.5 

182.4 

179-3 

176.2 

I73-I 

170.0 

167.0 

163.9 

235 

192.6 

189.5 

186.4 

183.3 

180.2 

177.1 

174.0 

170.9 

167.8 

164.7 

236 

190.4 

187.3 

184.2 

l8l.I 

178.0 

174-8 

171.7 

168.6 

165.5 

237 

191.4 

188.2 

185-1 

182.0 

178.8 

175-7 

172.5 

169.4 

166.3 

238 

192.3 

189.1 

186.0 

182.8 

179.7 

176.5 

173-4 

170.2 

167.1 

239 

193.2 

190.0 

186.9 

183.7 

180.5 

177.4 

174.2 

I7I.O 

167.9 

240 

I94.I 

191.0 

187.8 

184.6 

181.4 

178.2 

175.0 

171.9 

168.7 

241 

I95.I 

191.9 

188.7 

185.5 

182.3 

179.1 

175-9 

172.7 

169.5 

242 

196.0 

192.8 

189.6 

186.4 

183.1 

179.9 

176.7 

173.5 

170.3 

243 

196.9 

193-7 

190.5 

187.2 

184.0 

180.8 

177-5 

174.3 

I7I.I 

244 

197.8 

194.6 

191.4 

I88.I 

184.9 

181.6 

178.4 

I75-I 

171.9 

245 

198.8 

195.5 

192.3 

189.0 

185.7 

182.5 

179.2 

176.0 

172.7 

246 

199.7 

196.4 

193.2 

189.9 

186.6 

183.3 

180.1 

176.8 

173.5 

247 

200.6 

197.4 

194.1 

190.8 

187.5 

184.2 

180.9 

177.6 

174.3 

248 

2OI.6 

198-3 

195-0 

191.7 

188.4 

185.1 

181.7 

178.4 

I75.I 

249 

202.5 

199.2 

195-9 

192.6 

189.2 

185.9 

182.6 

179.3 

176.0 

250 

200.  i 

196.8 

1934 

190.1 

186.8 

183.4 

iSo.I 

176.8 

251 

2OI.O 

197.7 

194-3 

191.0 

187.6 

184.3 

180.9 

177.6 

252 

202.0 

198.6 

195.2 

191.9 

188.5 

185.1 

181.8 

178.4 

253 

202.9 

I99.5 

196.1 

192.7 

189.4 

186.0 

182.6 

179.2 

254 

203.8 

200.4 

197.0 

193.6 

190.2 

186.8 

183.4 

180.0 

255 

204.7 

201.3 

197.9 

194.5 

191.1 

187.7 

184.3 

180.8 

256 

205.7 

202.2 

198.8 

195.4 

191.9 

188.5 

185.1 

181.7 

257 

206.6 

203.1 

199.7 

196.3 

192.8 

189.4 

185.9 

182.5 

258 

207.5 

204.1 

2OO.6 

197.1 

193.7 

190.2 

186.8 

183.3 

259 

208.4 

205.0 

201.5 

198.0 

194.6 

191.1 

187.6 

184.1 

260 

209.4 

205.9 

202.4 

198.9 

195.4 

191.9 

188.4 

185.0 

SMITHSONIAN  TABLES. 


TABLE  19. 


REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL, 

METRIC    MEASURES. 
B0-B=B(10m-1). 

Top  argument  r     Height  of  the  barometer  (B). 

Side  argument :     Values  of  2000  in  obtained  from  Table  17. 


2000  m. 

HEIGHT  OF  THE  BAROMETER  IN  MILLIMETRES. 

590 

580 

570 

560 

550 

540 

530 

520 

510 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

260 

205.9 

202.4 

198.9 

195-4 

191.9 

188.4 

185-0 

181.5 

178.0 

261 

206.8 

203.3 

199.8 

196.3 

192.8 

189.3 

185.8 

182.3 

178.8 

262 

207.7 

204.2 

200.7 

197.2 

193.6 

I90.I 

186.6 

183-1 

179.6 

263 

208.6 

205.1 

201.6 

198.0 

194.5 

191.0 

187.4 

183-9 

180.4 

264 

209.6 

2O6.O 

202.5 

198.9 

195.4 

191.8 

188.3 

184.7 

181.1 

265 

210.5 

206.9 

203.3 

199.8 

196.2 

192.6 

189.1 

185.5 

181.9 

266 

211.4 

207.8 

204.2 

200.7 

I97.I 

193.5 

189.9 

186.3 

182.7 

267 

212.3 

208.7 

205.1 

201.5 

197.9 

194.3 

190.7 

187.1 

183.5 

268 

213-3 

209.6 

206.0 

202.4 

198.8 

195.2 

191.6 

1  88.0 

184.3 

269 

214.2 

210.5 

206.9 

203.3 

199.7 

196.0 

192.4 

188.8 

185.1 

270 

2I5.I 

211.5 

207.8 

204.2 

200.5 

196.9 

193.2 

189.6 

185.9 

271 

216.0 

212.4 

208.7 

205.0 

201.4 

197.7 

194.1 

190.4 

186.7 

272 

217.0 

213.3 

209.6 

205.9 

202.3 

198.6 

194.9 

191.2 

187.5 

273 

217.9 

214.2 

210.5 

206.8 

203.1 

199.4 

195.7 

192.0 

188.3 

274 

218.8 

2I5.I 

211.4 

207.7 

204.0 

200.3 

196.6 

192.9 

189.1 

275 

219.8 

216.0 

212.3 

208.6 

204.9 

201.  1 

1974 

193.7 

190.0 

276 

220.7 

216.9 

213.2 

209.5 

205.7 

202.0 

198.2 

194.5 

190.8 

277 

221.6 

217.9 

214.1 

210.3 

206.6 

202.8 

199.1 

I95-3 

191.6 

278 

222.6 

218.8 

215.0 

211.  2 

207.5 

203.7 

199.9 

196.1 

192.4 

279 

223.5 

219.7 

215.9 

2I2.I 

208.3 

204.5 

2OO.8 

197.0 

193.2 

280 

220.6 

216.8 

213.0 

209.2 

205.4 

201.6 

197.8 

194.0 

281 

221.5 

217.7 

213.9 

2IO.  I 

206.3 

202.4 

198.6 

194.8 

282 

222.5 

218.6 

214.8 

211.  0 

207.1 

203.3 

199.5 

195.6 

283 

2234 

219.5 

215.7 

211.  8 

208.0 

204.1 

200.3 

196.4 

284 

224.3 

220.5 

216.6 

212.7 

208.8 

205.0 

2OI.I 

197.2 

285 

225.2 

221.4 

217.5 

213.6 

209.7 

205.8 

201.9 

198.1 

286 

226.2 

222.3 

218.4 

214-5 

210.6 

206.7 

202.8 

198.9 

287 

227.1 

223.2 

219.3 

215.4 

211.4 

207.5 

203.6 

199.7 

288 

228.0 

224.1 

220.2 

216.2 

212.3 

208.4 

2044 

200.5 

289 

229.0 

225.0 

221.  1 

2I7.I 

213.2 

209.2 

205.3 

201.3 

290 

229.9 

225.9 

222.  0 

218.0 

214.0 

2  10.  1 

206.  1 

2O2.I 

291 

230.8 

226.8 

222.9 

218.9 

214.9 

210.9 

206.9 

203.0 

292 

231.8 

227.8 

223.8 

219.8 

215.8 

211.  8 

207.8 

203.8 

293 

232.7 

228.7 

224.7 

22O.7 

216.6 

212.6 

208.6 

204.6 

294 

233-6 

229.6 

225.6 

221.5 

217.5 

213.5 

209.5 

205.4 

295 

2"30.5 

226.5 

222.4 

218.4 

214.3 

210.3 

206.3 

296 

231.4 

227.4 

223.3 

219.3 

215.2 

211.  1 

207.1 

297 

232.4 

228.3 

224.2 

220.1 

216.1 

212.0 

207.9 

298 

233-3 

229.2 

225.1 

221.0 

216.9 

212.8 

208.7 

299 

234-2 

230.1 

226.0 

221.9 

217.8 

213.7 

209.6 

300 

235-1 

231.0 

226.9 

222.8 

218.6 

214.5 

210.4 

301 

236.1 

231.9 

227.8 

223.6 

219.5 

215.4 

211.  2 

302 

237.0 

232.8 

228.7 

224.5 

220.4 

216.2 

212.  1 

303 

237.9 

233.8 

229.6 

225.4 

221.2 

2I7.I 

212.9 

3°4 

238.9 

234-7 

230.5 

226.3 

222.1 

217.9 

213.7 

305 

239.8 

235.6 

231.4 

227.2 

223.0 

218.8 

214.6 

SMITHSONIAN  TABLES. 


97 


TABLE  19. 

REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 


Top  argument:     Height  of  the  barometer  (B). 

Side  argument  :     Values  of  2000  m  obtained  from  Table  17. 


2000m. 

HEIGHT  OE  THE  BAROMETER  IN  MHJJM3TRES. 

560 

550 

540 

530 

520 

510 

500 

490 

480 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

305 

235-6 

23L4 

227.2 

223.0 

218.8 

214.6 

210.3 

206.  1 

201.9 

306 

236.5 

232.3 

228.0 

223.8 

219.6 

2154 

211.  2 

206.9 

202.7 

307 

2374 

233-2 

228.9 

224.7 

220.5 

2l6.2 

212.  0 

207.7 

203.5 

308 

238.3 

234.1 

229.8 

225.6 

221.3 

2I7.I 

212.8 

208.5 

204.3 

309 

239.2 

235-0 

230.7 

226.4 

222.2 

217.9 

213.6 

209.4 

205.1 

3IO 

240.2 

235.9 

231.6 

227.3 

223.0 

218.7 

214.4 

210.  1 

205.9 

3ii 

241.1 

236.8 

232.5 

228.2 

223.9 

219.6 

215.3 

211.  0 

206.7 

312 

242.0 

237-7 

233.4 

229.1 

224.7 

22O.4 

216.1 

211.  8 

207.5 

3i3 

242.9 

238.6 

234-3 

229.9 

225.6 

221.2 

216.9 

212.6 

208.2 

3i4 

243.9 

239-5 

235-2 

230.8 

226.4 

222.1 

217.7 

213-4 

209.0 

315 

244.8 

240.4 

236.0 

231.7 

227.3 

222.9 

218.6 

214.2 

209.8 

316 

245.7 

24L3 

237.0 

232.6 

228.2 

223.8 

219.4 

215.0 

210.6 

317 

246.6 

242.2 

237.8 

233.4 

229.0 

224.6 

220.2 

215.8 

211.4 

3i8 

247.6 

243.2 

238.7 

234.3 

229.9 

225-5 

221.  1 

216.6 

212.2 

319 

248.5 

244.1 

239.6 

235-2 

230.8 

226.3 

221.9 

217.4 

213.0 

320 

2494 

245-0 

240.5 

236.1 

231.6 

227.2 

222.7 

218.3 

213-8 

321 

250.4 

245.9 

241.4 

237.0 

232.5 

228.0 

223.6 

2I9.I 

214.6 

322 

25L3 

246.8 

242.3 

237.8 

233.4 

228.9 

224.4 

219.9 

215.4 

323 

252.2 

247.7 

243.2 

238.7 

234.2 

229.7 

225.2 

220.7 

216.2 

324 

253.2 

248.7 

244.1 

239.6 

235.1 

230.6 

226.0 

221.5 

217.0 

325 

254.1 

249.6 

245.0 

240.5 

236.0 

231.4 

226.9 

222.4 

217.8 

326 

250.5 

245-9 

241.4 

236.8 

232.3 

227.7 

223.2 

218.6 

327 

25L4 

246.8 

242.3 

237-7 

233-1 

228.6 

224.0 

2I9.4 

328 

252.3 

247.7 

243.2 

238.6 

234.0 

229.4 

224.8 

220.2 

329 

253-3 

248.7 

244.0 

239-4 

234.8 

230.2 

225.6 

221.0 

330 

254.2 

249.6 

244.9 

240.3 

235.7 

23LI 

226.5 

221.8 

33i 

255-1 

250.5 

245.8 

241.2 

236.6 

231.9 

227.3 

222.6 

332 

256.0 

251.4 

246.7 

242.1 

2374 

232.8 

228.1 

223.5 

333 

257.0 

252.3 

247.6 

243.0 

238.3 

233.6 

228.9 

224.3 

334 

257.9 

253-2 

248.5 

243-8 

239.2 

234.5 

229.8 

225.1 

335 

258.8 

254.1 

249.4 

244.7 

240.0 

235-3 

230.6 

225.9 

336 

259-8 

255.0 

250.3 

245.6 

240.9 

236.2 

231.4 

226.7 

337 

260.7 

256.0 

251.2 

246.5 

241.7 

237.0 

232.3 

227.5 

338 

261.6 

256.9 

252.1 

247.4 

242.6 

237.8 

233.1 

228.3 

339 

262.6 

257.8 

253-0 

248.2 

243-5 

238.7 

233.9 

229.2 

340 

263.5 

258.7 

253.9 

249.1 

244-4 

239.6 

234-8 

230.0 

34i 

264.4 

259.6 

254-8 

250.0 

245.2 

240.4 

235-6 

230.8 

342 

260.6 

255.7 

250.9 

246.1 

241.3 

236.4 

231.6 

343 

261.5 

256.6 

251.8 

247.0 

242.1 

237.3 

232.4 

344 

262.4 

257.5 

252.7 

247.8 

243.0 

238.1 

233.2 

345 

263.3 

258.4 

253-6 

248.7 

243.8 

238.9 

234.1 

SMITHSONIAN  TABLES. 


98 


TABLE  20. 

DETERMINATION    OF    HEIGHTS    BY   THE    BAROMETER. 

ENGLISH    MEASURES. 

Values  of  60368  [1  +  O.OO10195  X  36]  log    29'90. 

B 


Barometric 
Pressure. 
B. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

Inches. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Fe,et. 

12.00 

24814 

24791 

24769 

24746 

24723 

24701 

24678 

24656 

24633 

24611 

12.10 

24588 

24566 

24543 

24521 

24499 

24476 

24454 

24431 

24409 

24387 

12.20 

24365 

24342 

24320 

24298 

24276 

24253 

24231 

24209 

24187 

24165 

12.30 

24H3 

24121 

24098 

24076 

24054 

24032 

24010 

23988 

23966 

23944 

I2.4O 

23923 

23901 

23879 

23857 

23835 

23813 

23791 

23770 

23748 

23726 

12.50 

23704 

23682 

23661 

23639 

23617 

23596 

23574 

23552 

23531 

23509 

12.60 

23488 

23466 

23445 

23423 

23402 

23380 

23359 

23337 

23316 

23294 

12.70 

23273 

23251 

23230 

23209 

23187 

23166 

23145 

23123 

23102 

23081 

12.80 

23060 

23038 

23017 

22996 

22975 

22954 

22933 

22911 

22890 

22869 

12.90 

22848 

22827 

22806 

22785 

22764 

22743 

22722 

22701 

22680 

22659 

13.00 

22638 

22617 

22596 

22576 

22555 

22534 

22513 

22492 

22471 

22451 

13.10 

22430 

22409 

22388 

22368 

22347 

22326 

22306 

22285 

22264 

22244 

13.20 

22223 

22203 

22182 

22162 

22141 

22I2I 

22IOO 

22080 

22059 

22039 

13-30 

22018 

21998 

21977 

21957 

21937 

2I9I6 

21896 

21876 

21855 

21835 

13.40 

21815 

21794 

21774 

21754 

21734 

2I7I3 

21693 

21673 

21653 

21633 

13.50 

2l6l2 

21592 

21572 

21552 

21532 

2I5I2 

21492 

21472 

21452 

21432 

13.60 

21412 

21392 

21372 

21352 

21332 

2I3I2 

21292 

21272 

21252 

21233 

13.70 

2I2I3 

2H93 

21173 

2H53 

21134 

2III4 

2I094 

21074 

21054 

21035 

13-80 

2IOI5 

20995 

20976 

20956 

20936 

20917 

20897 

20878 

20858 

20838 

13.90 

20819 

20799 

20780 

20760 

20741 

20721 

20702 

20682 

20663 

20643 

14.00 

20624 

20605 

20585 

20566 

20546 

20527 

20508 

20488 

20469 

20450 

14.10 

20431 

20411 

20392 

20373 

20354 

20334 

20315 

20296 

20277 

20258 

14.20 

20238 

20219 

20200 

20l8l 

20162 

20143 

2OI24 

20105 

20086 

20067 

14.30 

20048 

20029 

20010 

19991 

19972 

19953 

19934 

199*5 

19896 

19877 

14.40 

19858 

19839 

I982I 

19802 

19783 

19764 

19745 

19727 

19708 

19689 

14.50 

19670 

19651 

19633 

19614 

19595 

19577 

19558 

19539 

19521 

19502 

14.60 

19483 

19465 

19446 

19428 

19409 

19390 

19372 

19353 

19335 

19316 

14.70 

19298 

19279 

19261 

19242 

19224 

19206 

I9I87 

19169 

19150 

19132 

14.80 

19114 

19095 

19077 

19059 

19040 

I9O22 

19004 

18985 

18967 

18949 

14.90 

I893I 

18912 

18894 

18876 

18858 

18840 

I882I 

18803 

18785 

18767 

15.00 

18749 

18731 

I87I3 

18694 

18676 

18658 

18640 

18622 

18604 

18586 

15.10 

18568 

18550 

18532 

18514 

18496 

18478 

18460 

18442 

18425 

18407 

15.20 

18389 

18371 

18353 

18335 

18317 

18300 

18282 

18264 

18246 

18228 

15-30 

I82II 

18193 

I8I75 

I8I57 

18140 

I8I22 

l8l04 

18086 

18069 

18051 

15.40 

18033 

18016 

17998 

17981 

17963 

17945 

17928 

17910 

17893 

17875 

15.50 

17858 

17840 

17823 

17805 

17788 

17770 

17753 

17735 

I77I8 

17700 

15.60 

17683 

17665 

17648 

17631 

17613 

17596 

17578 

17561 

17544 

17526 

1570 

17509 

17492 

17474 

17457 

17440 

17423 

17405 

17388 

I737I 

17354 

15-80 

17337 

I73I9 

17302 

17285 

17268 

I725I 

17234 

17216 

17199 

17182 

15.90 

17165 

17148 

I7I3I 

17114 

17097 

17080 

17063 

17046 

17029 

17012 

16.00 

16995 

16978 

16961 

16944 

16927 

16910 

16893 

16876 

16859 

16842 

16.10 

16825 

16808 

16792 

16775 

16758 

I674I 

16724 

16707 

16691 

16674 

16.20 

16657 

16640 

16623 

16607 

16590 

16573 

16557 

16540 

16523 

16506 

16.30 

16490 

16473 

16456 

16440 

16423 

16406 

16390 

16373 

16357 

16340 

16.40 

16324 

16307 

16290 

16274 

16257 

I624I 

16224 

16208 

16191 

16175 

16.50 

16158 

16142 

I6I25 

16109 

16092 

16076 

16060 

16043 

16027 

16010 

16.60 

15994 

15978 

I596I 

15945 

15929 

I59I2 

15896 

15880 

15863 

15847 

16.70 

I583I 

15815 

15798 

15782 

15766 

15750 

15733 

I57I7 

I570I 

15685 

16.80 

15669 

15652 

15636 

15620 

15604 

15588 

15572 

15556 

15539 

15523 

16.90 

15507 

I5491 

15475 

15459 

15443 

15427 

I54H 

15395 

15379 

15363 

17.00 

15347 

I533I 

I53I5 

15299 

15283 

15267 

I525I 

15235 

15219 

15203 

SMITHSONIAN  TABLES. 


100 


TABLE   20. 
DETERMINATION    OF    HEIGHTS    BY   THE    BAROMETER. 

ENGLISH    MEASURES. 

29.9O 


Values  of  60368  [1+0.0010195X36]  log 


B 


Barometric 
Pressure. 
B. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

Inches. 
17.00 

Feet. 

15347 

Feet. 
I533I 

Feet. 
I53I5 

Feet. 
15299 

Feet. 

15283 

Feet. 
15267 

Feet. 
I525I 

Feet. 

15235 

Feet. 
15219 

Feet. 

15203 

17.10 

I5I87 

15172 

I5I56 

15140 

15124 

I5I08 

15092 

15076 

15061 

15045 

17.20 

15029 

*50I3 

14997 

14982 

14966 

14950 

14934 

14919 

14903 

14887 

17.30 

14871 

14856 

14840 

14824 

14809 

14793 

14777 

14762 

14746 

14730 

17.40 

I47I5 

14699 

14684 

14668 

14652 

14637 

14621 

14606 

14590 

14575 

17.50 

14559 

14544 

14528 

14512 

14497 

14481 

14466 

I445I 

14435 

14420 

17.60 

14404 

14389 

14373 

14358 

14342 

14327 

14312 

14296 

14281 

14266 

17.70 

14250 

14235 

14219 

14204 

14189 

I4I73 

14158 

I4I43 

14128 

14112 

17.80 

14097 

14082 

14067 

14051 

14036 

14021 

14006 

13990 

13975 

13960 

17.90 

J3945 

13930 

I39H 

13899 

13884 

13869 

13854 

13839 

13824 

13808 

18.00 

13793 

13778 

13763 

13748 

13733 

13718 

13703 

13688 

13673 

13658 

18.10 

13643 

13628 

13613 

13598 

13583 

13568 

13553 

13538 

13523 

13508 

18.20 

13493 

T3478 

13463 

13448 

13433 

13418 

13404 

13389 

13374 

13359 

18.30 

133  14 

13329 

I33H 

13300 

13285 

13270 

13255 

13240 

13226 

13211 

18.40 

13196 

13181 

13166 

I3I52 

I3I37 

13122 

13107 

13093 

13078 

13063 

18.50 

13049 

13034 

13019 

13005 

12990 

12975 

12961 

12946 

12931 

12917 

18.60 

12902 

12888 

12873 

12858 

12844 

12829 

12815 

12800 

12785 

12771 

18.70 

12756 

12742 

12727 

12713 

12698 

12684 

12669 

12655 

12640 

12626 

18.80 

12611 

12597 

12583 

12568 

12554 

12539 

12525 

12510 

12496 

12482 

18.90 

12467 

12453 

12438 

12424 

12410 

12395 

12381 

12367 

12352 

12338 

19.00 

12324 

12310 

12295 

I228I 

12267 

12252 

12238 

12224 

I22IO 

12195 

19.10 

12181 

12167 

I2I53 

12138 

12124 

I2IIO 

12096 

12082 

12068 

12053 

19.20 

12039 

12025 

I2OII 

11997 

11983 

11969 

H954 

11940 

II926 

11912 

19.30 

11898 

11884 

II870 

11856 

11842 

II828 

11814 

IlSoo 

II786 

II772 

19.40 

H758 

II744 

II730 

11716 

II702 

II688 

11674 

11660 

11646 

11632 

19.50 

11618 

11604 

II590 

11576 

11562 

II548 

H534 

11520 

II507 

I  M93 

19.60 

11479 

11465 

H45I 

H437 

11423 

II4IO 

11396 

11382 

II368 

H354 

19.70 

11340 

11327 

H3I3 

11299 

11285 

II272 

11258 

11244 

II230 

11217 

19.80 

11203 

11189 

HI75 

III62 

11148 

HI34 

III2I 

11107 

II093 

11080 

19.90 

11066 

11052 

II039 

II025 

IIOII 

I0998 

10984 

10970 

10957 

10943 

20.00 

10930 

10916 

10903 

10889 

10875 

10862 

10848 

10835 

I082I 

10808 

20.10 

10794 

10781 

10767 

10754 

10740 

T0727 

I07I3 

10700 

10686 

10673 

2O.2O 

10659 

10646 

10632 

10619 

10605 

10592 

10579 

10565 

10552 

10538 

2O.3O 

10525 

10512 

10498 

10485 

10472 

10458 

10445 

10431 

I04I8 

10405 

20.40 

10391 

10378 

10365 

10352 

10338 

10325 

I03I2 

10298 

10285 

10272 

20.50 

10259 

10245 

10232 

10219 

10206 

IOI92 

IOI79 

IOI66 

IOI53 

10139 

20.60 

10126 

IOII3 

IOIOO 

10087 

10074 

IOO6O 

10047 

10034 

IOO2I 

10008 

20.70 

9995 

9982 

9968 

9955 

9942 

9929 

9916 

99°3 

9890 

9877 

20.80 

9864 

9851 

9838 

9825 

9812 

9799 

9786 

9772 

9759 

9746 

20.90 

9733 

9720 

9707 

9694 

9681 

9668 

9655 

9642 

9629 

9617 

21.00 

9604 

9591 

9578 

9565 

9552 

9539 

9526 

9513 

9500 

9487 

21.10 

9474 

9462 

9449 

9436 

9423 

9410 

9397 

9384 

9372 

9359 

2  1.  2O 

9346 

9333 

9320 

9307 

9295 

9282 

9269 

9256 

9244 

9231 

21.30 

9218 

9205 

9193 

9180 

9167 

9*54 

9142 

9129 

9116 

9103 

21.40 

9091 

9078 

9065 

9053 

9040 

9027 

9OI5 

9002 

8989 

8977 

21.50 

8964 

8951 

8939 

8926 

8913 

8901 

8888 

8876 

8863 

8850 

21.60 

8838 

8825 

8813 

8800 

8788 

8775 

8762 

8750 

8737 

8725 

21.70 

8712 

8700 

8687 

8675 

8662 

8650 

8637 

8625 

8612 

8600 

21.80 

8587 

8575 

8562 

8550 

8538 

8525 

8513 

8500 

8488 

8475 

21.90 

8463 

8451 

8438 

8426 

8413 

8401 

8389 

8376 

8364 

8352 

22.00 

8339 

8327 

8314 

8302 

8290 

8277 

8265 

8253 

8240 

8228 

SMITHSONIAN  TABLES. 


IOI 


TABLE  20. 

DETERMINATION    OF    HEIGHTS    BY   THE    BAROMETER. 

ENGLISH    MEASURES. 

Values  of  60368  [1+0.0010195X36]  log  29'90. 


Barometric 
Pressure. 
B. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

Inches. 

22.00 

Feet. 

8339 

Feet. 
8327 

Feet. 

8314 

Feet. 
8302 

Feet. 
8290 

Feet. 

8277 

Feet. 

8265 

Feet. 
8253 

Feet. 
8240 

Feet. 
8228 

22.  IO 

8216 

8204 

8191 

8179 

8167 

8154 

8142 

8130 

8118 

8105 

22.2O 

8093 

8081 

8069 

8056 

8044 

8032 

8020 

8008 

7995 

7983 

22.30 

7971 

7959 

7947 

7935 

7922 

7910 

7898 

7886 

7874 

7862 

22.40 

7849 

7837 

7825 

7813 

7801 

7789 

7777 

7765 

7753 

7740 

22.50 

7728 

7716 

7704 

7692 

7680 

7668 

7656 

7644 

7632 

7620 

22.60 

7608 

7596 

7584 

7572 

7560 

7548 

7536 

7524 

7512 

7500 

22.70 

7488 

7476 

7464 

7452 

7440 

7428 

7416 

7404 

7392 

7380 

22.80 

7368 

7356 

7345 

7333 

7321 

7309 

7297 

7285 

7273 

7261 

22.90 

7249 

7238 

7226 

7214 

7202 

7190 

7178 

7166 

7155 

7143 

23.00 

7131 

7119 

7107 

7096 

7084 

7072 

7060 

7048 

7037  ' 

7025 

23.10 

7013 

7001 

6990 

6978 

6966 

6954 

6943 

6931 

6919 

6907 

23.20 

6896 

6884 

6872 

6861 

6849 

6837 

6825 

6814 

6802 

6790 

23-30 

6779 

6767 

6755 

6744 

6732 

6721 

6709 

6697 

6686 

6674 

23.40 

6662 

6651 

6639 

6628 

6616 

6604 

6593 

6581 

6570 

6558 

23.50 

6546 

6535 

6523 

6512 

6500 

6489 

6477 

6466 

6454 

6443 

23.60 

6431 

6420 

6408 

6397 

6385 

6374 

6362 

6351 

6339 

6328 

23.70 

6316 

6305 

6293 

6282 

6270 

6259 

6247 

6236 

6225 

6213 

23.80 

6202 

6190 

6179 

6167 

6156 

6145 

6i33 

6l22 

6110 

6099 

23.90 

6088 

6076 

6065 

6054 

6042 

6031 

6020 

6008 

5997 

5986 

24.00 

5974 

5963 

5952 

5940 

5929 

5918 

5906 

5895 

5884 

5872 

24.10 

5861 

5850 

5839 

5827 

58i6 

5805 

5794 

5782 

5771 

5760 

24.20 

5749 

5737 

5726 

5715 

5704 

5693 

5681 

5670 

5659 

5648 

24.30 

5637 

5625 

5614 

5603 

5592 

558l 

5570 

5558 

5547 

5536 

24.40 

5525 

5514 

5503 

5492 

5480 

5469 

5458 

5447 

5436 

5425 

24.50 

5414 

5403 

5392 

538i 

5369 

5358 

5347 

5336 

5325 

5314 

24.60 

5303 

5292 

5281 

5270 

5259 

5248 

5237 

5226 

5215 

5204 

24.70 

5193 

5182 

5i7i 

5160 

5149 

5138 

5127 

5116 

5105 

24.80 

5083 

5072 

5061 

5050 

5039 

5028 

5017 

5006 

4995 

4985 

24.90 

4974 

4963 

4952 

4941 

4930 

4919 

4908 

4897 

4886 

4876 

25.00 

4865 

4854 

4843 

4832 

4821 

4810 

4800 

4789 

4778 

4767 

25.10 

4756 

4745 

4735 

4724 

4713 

4702 

4691 

4681 

4670 

4659 

25.20 

4648 

4637 

4627 

4616 

4605 

4594 

4584 

4573 

4562 

4551 

25-30 

4540 

4530 

4519 

4508 

4498 

4487 

4476 

4465 

4455 

/[/j/j/[ 

25.40 

4433 

4423 

4412 

44oi 

4391 

438o 

4369 

4358 

4348 

4337 

25.50 

4326 

43i6 

4305 

4295 

4284 

4273 

4263 

4252 

4241 

4231 

25.60 

4220 

4209 

4199 

4188 

4178 

4167 

4156 

4146 

4135 

4125 

25.70 

4114 

4104 

4093 

4082 

4072 

4061 

4051 

4040 

4030 

4019 

25.80 

4009 

3998 

3988 

3977 

3966 

3956 

3945 

3935 

3924 

3914 

25.90 

3903 

3893 

3882 

3872 

3861 

3851 

3841 

3830 

3820 

3809 

26.00 

3799 

3788 

3778 

3767 

3757 

3746 

3736 

3726 

3715 

3705 

26.10 

3694 

3684 

3674 

3663 

3653 

3642 

3632 

3622 

3611 

3601 

26.20 

3590 

358o 

3570 

3559 

3549 

3539 

3528 

35i8 

35o8 

3497 

26.30 

3487 

3477 

3466 

3456 

3446 

3435 

3425 

3415 

3404 

3394 

26.40 

3384 

3373 

3363 

3353 

3343 

3332 

3322 

3312 

3301 

3291 

26.50 

3281 

3270 

3260 

3250 

3240 

3230 

3219 

3209 

3199 

3189 

SMITHSONIAN  TABLES. 


102 


TABLE  20. 
DETERMINATION    OF    HEIGHTS    BY   THE    BAROMETER. 

ENGLISH    MEASURES. 

Values  of  60368  [1+0.0010195  X  36]  log  ^        - 


Barometric 
Pressure. 
B. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

Inches. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

26.50 

3281 

3270 

3260 

3250 

3240 

3230 

3219 

3209 

3199 

3189 

26.60 

3179 

3168 

3158 

3148 

3138 

3128 

3H7 

3107 

3097 

3087 

26.70 

3077 

3066 

3056 

3046 

3036 

3026 

3016 

3005 

2995 

2985 

26.80 

2975 

2965 

2955 

2945 

2934 

2924 

2914 

2904 

2894 

2884 

26.90 

2874 

2864 

2854 

2843 

2833 

2823 

2813 

2803 

2793 

2783 

27.00 

2773 

2763 

2753 

2743 

2733 

2723 

2713 

2703 

2692 

2682 

27.10 

2672 

2662 

2652 

2642 

2632 

2622 

2612 

2602 

2592 

-2582 

27.20 

2572 

2562 

2552 

2542 

2532 

2522 

2512 

2502 

2493 

2483 

27.30 

2473 

2463 

2453 

2443 

2433 

2423 

2413 

2403 

2393 

2383 

27.40 

2373 

2363 

2353 

2343 

2334 

2324 

23H 

2304 

2294 

2284 

27.50 

2274 

2264 

2254 

2245 

2235 

2225 

2215 

2205 

2195 

2185 

27.60 

2176 

2166 

2156 

2146 

2136 

2126 

2116 

2IO7 

2097 

2087 

27.70 

2077 

2067 

2058 

2048 

2038 

2028 

2018 

2009 

1999 

1989 

27.80 

1979 

1970 

1960 

1950 

1940 

1930 

1921 

1911 

1901 

1891 

27.90 

1882 

I872 

1862 

1852 

1843 

1833 

1823 

1814 

1804 

1794 

28.00 

1784 

1775 

1765 

1755 

1746 

1736 

1726 

1717 

1707 

1697 

28.10 

1688 

1678 

1668 

1659 

1649 

1639 

1630 

1620 

1610 

1601 

28.20 

1591 

1581 

1572 

1562 

1552 

1543 

1533 

1524 

I5M 

1504 

28.30 

1495 

1485 

1476 

1466 

1456 

1447 

1437 

1428 

1418 

1408 

28.40 

1399 

1389 

1380 

1370 

1361 

1351 

1342 

1332 

1322 

1313 

28.50 

1303 

1294 

1284 

1275 

1265 

1256 

1246 

1237 

1227 

1218 

28.60 

1208 

II99 

1189 

Ti8o 

1170 

1161 

1151 

1142 

1132 

1123 

28.70 

1113 

1104 

1094 

1085 

1075 

1066 

1057 

1047 

1038 

1028 

28.80 

1019 

1009 

1000 

990 

98l 

972 

962 

953 

943 

934 

28.90 

925 

915 

906 

896 

887 

878 

868 

859 

849 

840 

29.00 

831 

821 

812 

803 

793 

784 

775 

765 

756 

746 

29.10 

737 

728 

718 

709 

700 

690 

681 

672 

663 

653 

29.20 

644 

635 

625 

616 

607 

597 

588 

579 

570 

560 

29.30 

55i 

542 

532 

523 

5H 

505 

495 

486 

477 

468 

29.40 

458 

449 

440 

43i 

421 

412 

403 

394 

384 

375 

29.50 

366 

357 

348 

338 

329 

320 

3" 

302 

252 

283 

29.60 

274 

265 

256 

247 

237 

228 

219 

2IO 

20  1 

192 

29.70 

182 

173 

164 

155 

146 

137 

128 

118 

109 

100 

29.80 

+  9i 

+  82 

4-  73 

+  64 

+  55 

+  45 

+  36 

+  27 

+  18 

+  9 

29.90 

o 

-  9 

-  18 

-  27 

-  36 

-  45 

-  55 

-  64 

-  73 

-  82 

30.00 

-  9i 

—  100 

-109 

-118 

-127 

-136 

-145 

-154 

-163 

-172 

30.10 

—  181 

-190 

-199 

-208 

-217 

-226 

-235 

-244 

-253 

-262 

30.20 

-271 

—  280 

-289 

—  298 

-307 

-316 

-325 

-334 

-343 

-352 

30.30 

-361 

-370 

-379 

-388 

-397 

—  406 

-415 

-424 

-433 

-442 

30.40 

-451 

—  460 

-469 

-478 

-486 

-495 

-504 

-513 

—  522 

-531 

30.50 

-540 

-549 

-558 

-567 

-576 

-585 

-593 

—  602 

-6n 

—  620 

30.60 

—  629 

-638 

-647 

-656 

-665 

-673 

-682 

-691 

-700 

-709 

30.70 

-718 

-727 

-735 

-744 

-753 

-762 

-771 

-780 

-788 

-797 

30.80 

-806 

-815 

—  824 

-833 

-841 

-850 

-859 

-868 

-877 

-885 

SMITHSONIAN  TABLES. 


103 


TABLE  21. 

DETERMINATION    OF    HEIGHTS    BY   THE    BAROMETER. 

ENGLISH    MEASURES. 
Term  for  Temperature:   0.002039  (0  —  5°°)  z. 

For  temperatures  j  j*e{^  5^0  p*  }  the  values  are  to  be  | 


Mean 
Temperature. 

6. 

APPROXIMATE  DIFFERENCE  OF  HEIGHT  OBTAINED  FROM  TABLE  20. 

20 

40 

60 

80 

100 

200 

300 

400 

500 

600 

700 

800 

900 

F. 

F. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

49° 

51° 

O 

0 

O 

0 

0 

0 

I 

I 

I 

I 

I 

2 

2 

48 

52 

0 

0 

0 

0 

0 

I 

I 

2 

2 

2 

3 

3 

4 

47 

53 

0 

0 

0 

0 

I 

I 

2 

2 

3 

4 

4 

5 

6 

46 

54 

0 

0 

0 

I 

I 

2 

2 

3 

4 

5 

6 

7 

7 

45 

55 

0 

O 

I 

I 

I 

2 

3 

4 

5 

6 

7 

8 

9 

44 

56 

0 

O 

I 

I 

I 

2 

4 

5 

6 

7 

9 

10 

ii 

43 

57 

O 

I 

I 

3 

4 

6 

7 

9 

10 

ii 

13 

42 

58 

O 

I 

2 

3 

5 

7 

8 

10 

ii 

13 

15 

59 

O 

I 

2 

4 

6 

7 

9 

ii 

13 

15 

17 

40 

60 

0 

2 

2 

4 

6 

8 

10 

12 

14 

16 

18 

39 

61 

0 

2 

2 

4 

7 

9 

ii 

13 

16 

18 

20 

38 

62 

0 

2 

2 

5 

7 

10 

12 

15 

17 

20 

22 

37 

63 

I 

2 

2 

3 

5 

8 

ii 

13 

16 

19 

21 

24 

36 

64 

I 

2 

2 

3 

6 

9 

ii 

14 

17 

20 

23 

26 

35 

65 

I 

2 

2 

3 

6 

9 

12 

15 

18 

21 

24 

28 

34 

66 

I 

2 

3 

3 

7 

10 

13 

16 

20 

23 

26 

29 

33 

67 

I 

2 

3 

3 

7 

10 

14 

17 

21 

24 

28 

31 

32 

68 

2 

3 

4 

7 

ii 

15 

18 

22 

26 

29 

33 

69^ 

2 

2 

3 

4 

8 

12 

15 

19 

23 

27 

31 

35 

30 

70 

2 

2 

3 

4 

8 

12 

16 

20 

24 

29 

33 

37 

29 

71 

2 

3 

3 

4 

9 

13 

17 

21 

26 

30 

34 

39 

28 

72 

2 

3 

4 

4 

9 

13 

18 

22 

27 

31 

36 

40 

27 

73 

2 

3 

4 

5 

9 

14 

19 

23 

28 

33 

38 

42 

26 

74 

2 

3 

4 

5 

10 

15 

20 

24 

29 

34 

39 

44 

25 

75 

2 

3 

4 

•  5 

10 

15 

20 

25 

31 

36 

4i 

46 

24 

76 

2 

3 

4 

5 

ii 

16 

21 

27 

32 

37 

42 

48 

23 

77 

2 

3 

4 

6 

ii 

17 

22 

28 

33 

39 

44 

50 

22 

78 

2 

3 

5 

6 

ii 

17 

23 

29 

34 

40 

46 

51, 

21 

79 

2 

4 

5 

6 

12 

18 

24 

30 

35 

41 

47 

53 

20 

80 

2 

4 

5 

6 

12 

18 

24 

31 

37 

43 

49 

55 

19 

81 

3 

4 

5 

6 

13 

19 

25 

32 

38 

44 

57 

18 

82 

3 

4 

5 

7 

13 

20 

26 

33 

39 

46 

52 

59 

17 

83 

3 

4 

5 

7 

13 

20 

27 

34 

40 

47 

54 

6l 

16 

84 

3 

4 

6 

7 

14 

21 

28 

35 

42 

49 

55 

62 

15 

85 

I 

3 

4 

6 

7 

14 

21 

29 

36 

43 

50 

57 

64 

14 

86 

I 

3 

4 

6 

7 

15 

22 

29 

37 

44 

51 

59 

66 

13 

87 

2 

3 

5 

6 

8 

15 

23 

30 

38 

45 

53 

60 

68 

12 

88 

2 

3 

^5 

6 

8 

15 

23 

31 

39 

46 

54 

62 

70 

II 

89 

2 

3 

6 

8 

16 

24 

32 

40 

48 

56 

64 

72 

10 

90 

2 

3 

5 

7 

8 

16 

24 

33 

41 

49 

57 

65 

73 

9 

91 

2 

3 

5 

7 

8 

17 

25 

33 

42 

50 

59 

67 

75 

8 

92 

2 

3 

5 

7 

9 

17 

26 

34 

43 

60 

69 

77 

7 

93 

2 

4 

5 

7 

9 

18 

26 

35 

44 

53 

61 

70 

79 

*  6 

94 

2 

4 

5 

7 

9 

18 

27 

36 

45 

54 

63 

81 

5 

95 

2 

4 

6 

7 

9 

18 

28 

37 

46 

55 

64 

73' 

'83 

4 

96 

2 

4 

6 

8 

9 

19 

28 

38 

47 

56 

66 

75  - 

84* 

""" 

3 

97 

2 

4 

6 

8 

10 

19 

29 

38 

48, 

^57 

67 

"  86 

2 

98 

2 

4 

6 

8 

10 

20 

29 

39 

49* 

^ 

-  69  rr8 

^88 

I 

99 

2 

4 

6 

8 

10 

2O 

3° 

.40 

•  *"• 

70  mfco  . 

VjQO^ 

^- 

0 

100 

2 

4 

6 

8 

IO 

20 

.31 

41 

•$1* 

M 

d2Lr  82- 
•  £+\  .-'f 

^92 

SMITHSONIAN  TABLES. 


104 


DETERMINATION    OF    HEIGHTS    BY   THE 

ENGLISH    MEASURES. 
Term  for  Temperature  :    0.002039  (0  —  5°°)  z. 


TABLE 

BAROMETER. 


21. 


For  temperatures 


£}the  va.ues  are  to  be 


Mean 
Temperature. 

6. 

APPROXIMATE  DIFFERENCE  OF  HEIGHT  OBTAINED  FROM  TABLE  20. 

1000 

2000 

3000 

4000 

5000 

6000 

7000 

8000 

9000 

10000 

20000 

F. 

F. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

49° 

51° 

2 

4 

6 

8 

10 

12 

14 

16 

18 

20 

41 

48 

52 

4 

8 

12 

16 

20 

24 

29 

33 

37 

41 

82 

47 

53 

6 

12 

18 

24 

31 

37 

43 

49 

55 

61 

122 

46 

54 

8 

16 

24 

33 

41 

49 

57 

65 

73 

82 

163 

45 

55 

10 

20 

31 

41 

51 

61 

71 

82 

92 

102 

2O4 

44 

56 

12 

24 

37 

49 

61 

73 

86 

98 

no 

122 

245 

43 

57 

14 

29 

43 

57 

71 

86 

100 

114 

128 

143 

285 

42 

58 

16 

33 

49 

65 

82 

98 

114 

130 

147' 

163 

326 

4i 

59 

18 

37 

55 

73 

92 

110 

128 

147 

165 

184 

367 

40 

60 

20 

4i 

61 

82 

IO2 

122 

143 

163 

184 

204 

408 

39 

61 

22 

45 

67 

90 

112 

135 

157 

179 

202 

224 

449 

38 

62 

24 

49 

73 

98 

122 

147 

171 

I96 

22O 

245 

489 

37 

63 

27 

53 

80 

106 

133 

159 

186 

212 

239 

265 

530 

36 

64 

29 

57 

86 

114 

143 

171 

200 

228 

257 

285 

57i 

35 

65 

31 

61 

92 

122 

153 

184 

214 

245 

275 

306 

612 

34 

66 

33 

65 

98 

130 

163 

196 

228 

261 

294 

326 

652 

33 

67 

35 

69 

104 

T39 

173 

208 

243 

277 

312 

347 

693 

32 

68 

37 

73 

no 

147 

184 

220 

257 

294 

330 

367 

734 

3i 

69 

39 

77 

116 

155 

194 

232 

271 

3IO 

349 

387 

775 

30 

70 

4i 

82 

122 

163 

204 

245 

285 

326 

367 

408 

816 

29 

7i 

43 

86 

128 

171 

214 

257 

300 

343 

385 

428 

856 

28 

72 

45 

.  90 

135 

179 

224 

269 

314 

359 

404 

449 

897 

27 

73 

47 

94 

141 

188 

234 

28l 

328 

375 

422 

469 

938 

26 

74 

49 

98 

147 

196 

245 

294 

343 

39i 

440 

489 

979 

25 

75 

5i 

102 

153 

204 

255 

306 

357 

408 

459 

5io 

1020 

24 

76 

53 

106 

159 

212 

265 

318 

37i 

424 

477 

530 

1060 

23 

77 

55 

110 

165 

22O 

275 

330 

385 

440 

495 

551 

IIOI 

22 

78 

57 

114 

171 

228 

285 

343 

400 

457 

5H 

571 

1142 

21 

79 

59 

118 

177 

236 

296 

355 

414 

473 

532 

591 

1183 

20 

80 

61 

122 

184 

245 

306 

367 

428 

489 

55i 

612 

1223 

19 

81 

63 

126 

I9O 

253 

316 

379 

442 

506 

569 

632 

1264 

18 

82 

65 

130 

196 

26l 

326 

39i 

457 

522 

587 

652 

1305 

17 

83 

67 

135 

202 

269 

336 

404 

47i 

538 

606 

673 

1346 

16 

84 

69 

139 

208 

277 

347 

416 

485 

555 

624 

693 

1387 

15 

85 

7i 

143 

214 

285 

357 

428 

500 

57i 

642 

714 

1427 

14 

86 

^73 

147 

22O 

294 

367 

440 

5M 

587 

661 

734 

1468 

13 

87 

*75 

151 

226 

302 

377 

453 

528 

604 

679 

754 

1509 

12 

88 

77 

155 

232 

310 

387 

465 

542 

620 

697 

775 

1550 

II 

89 

80 

159 

239 

318 

398 

477 

557 

636 

716 

795 

1590 

10 

90 

82 

163 

245 

326 

408 

489 

57i 

652 

734 

816 

1631 

9 

9i 

84 

I67 

251 

334 

418 

502 

585 

669 

752 

836 

1672 

8 

92 

86 

171 

257 

343 

428 

5H 

599 

685 

771 

856 

1713 

7 

93 

88 

175 

263 

35i 

438 

526 

614 

701 

789 

877 

1754 

6 

94 

90 

179 

269 

359 

449 

538 

628 

718 

807 

897 

1794 

-  5 

95 

92 

184 

275 

367 

459 

55i 

642 

734 

826 

918 

1835 

-4 

96 

188 

28l 

375 

469 

563 

657 

750 

844 

938 

1876 

3 

97 

96 

192 

287 

383 

479 

575 

671 

767 

862 

958 

1917 

2 

98 

98 

196 

294 

391 

489 

587 

685 

783 

881 

979 

1957 

I 

99 

100 

200 

300 

400 

500 

599 

699" 

'  799 

899 

999 

1998 

0 

100 

102 

204 

306 

408 

5io 

612 

714 

816 

918 

1020 

2039 

SMITHSONIAN  TABLES. 


105 


TABLE  22. 

DETERMINATION    OF    HEIGHTS    BY   THE    BAROMETER. 

ENGLISH    MEASURES. 
Correction  for  Latitude  and  Weight  of  Mercury:    z  (0.002662  <:0s  2  <£  4-0.00239). 


Lati- 
tude. 

APPROXIMATE  DIFFERENCE  OF  HEIGHT  OBTAINED  FROM  TABLES   20-21. 

500 

1000 

1500 

2000 

2500 

3000 

3500 

4000 

4500 

5000 

5500 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

0° 

4-3 

+  5 

4-8 

4-10 

4-13 

4-15 

-MS 

4-20 

4-23 

+  25 

4-28 

2 

3 

5 

8 

10 

13 

15 

18 

20 

23 

25 

28 

4 

3 

5 

8 

10 

13 

15 

18 

20 

23 

25 

28 

6 

2 

5 

7 

10 

12 

15 

17 

20 

22 

25 

27 

8 

2 

5 

7 

10 

12 

15 

17 

20 

22 

25 

27 

10 

4-2 

4-5 

4-7 

4-io 

4-i2 

4-15 

4-17 

H-20 

4-22 

4-24 

+  27 

12 

2 

5 

7 

10 

12 

14 

17 

19 

22 

24 

27 

3 

2 

2 

5 
5 

7  • 
7 

9 
9 

12 
12 

14 

14 

3 

19 
19 

21 
21 

24 
23 

26 
26 

18 

2 

5 

7 

9 

II 

14 

16 

18 

20 

23 

25 

20 

4-2 

4-4 

4-7 

4-  9 

4-  ii 

4-13 

4-i6 

4-17 

4-20 

4-22 

4-24 

22 

2 

4 

6 

II 

13 

15 

17 

19 

22 

24 

24 

2 

4 

6 

8 

10 

13 

15 

17 

19 

21 

23 

26 

2 

4 

6 

8 

10 

12 

14 

16 

18 

2O 

22 

28 

2 

4 

6 

8 

10 

12 

14 

16 

17 

19 

21 

30 

4-2 

4-4 

4-6 

4-  7 

4-  9 

4-  ii 

4-i3 

4-i5 

4-17 

4-19 

4-20 

32 

2 

4 

5 

7 

II 

12 

14 

16 

18 

20 

It 

2 
2 

3 
3 

5 
5 

g 

8 

10 
10 

12 
II 

14 
13 

15 
14 

17 
16 

19 

18 

38 

2 

3 

5 

6 

8 

9 

II 

12 

14 

15 

17 

40 

4-i 

4-3 

4-4 

4-  6 

4-  7 

4-  9 

4-10 

4-  ii 

4-13 

4-14 

4-i6 

42 

i 

3 

4 

5 

7 

8 

9 

ii 

12 

13 

15 

44 

i 

2 

4 

5 

6 

7 

9 

10 

II 

12 

H 

45 

4-i 

4-2 

4-4 

4-  5 

4-  6 

4-  7 

4-  8 

4-io 

4-  ii 

4-12 

4-i3 

46 

.f.! 

4-2 

4-3 

4-  5 

4-  6 

4-  7 

4-  8 

4-  9 

-f-io 

4-  ii 

4-i3 

48 

i 

2 

3 

4 

5 

6 

7 

8 

10 

ii 

12 

50 

i 

2 

3 

4 

5 

6 

7 

8 

9 

10 

II 

52 

4-i 

4-2 

4-3 

4-  3 

4-  4 

4-  5 

4-  6 

4-  7 

4-  8 

4-  9 

4-10 

54 

i 

2 

2 

3 

4 

5 

5 

6 

7 

8 

9 

56 

i 

I 

2 

3 

3 

4 

5 

6 

7 

7 

8 

58 

i 

I 

2 

2 

3 

4 

4 

5 

6 

6 

7 

60 

i 

I 

2 

2 

3 

3 

4 

4 

5 

5 

6 

62 

0 

+  I 

•+I 

4-  2 

4-  2 

4-  3 

4-  3 

4-  4 

4-  4 

4-  5 

4-  5 

64 

0 

I 

I 

2 

2 

2 

3 

3 

3 

4 

4 

66 

o 

I 

I 

I 

2 

2 

2 

2 

3 

3 

3 

68 

o 

0 

I 

I 

I 

I 

2 

2 

2 

2 

3 

70 

0 

0 

I 

I 

I 

I 

I 

I 

2 

2 

2 

72 

0 

0 

O 

0 

4-  i 

4-  i 

4-  i 

4-  i 

4-  i 

4-  i 

4-  i 

74 

0 

0 

0 

0 

0 

0 

i 

i 

i 

4-  i 

4-  i 

76 

o 

0 

0 

0 

o 

0 

0 

0 

0 

0 

0 

78 

0 

o 

0 

0 

o 

0 

0 

0 

0 

0 

0 

80 

0 

0 

o 

o 

o 

o 

0 

0 

0 

—  i 

—  I 

SMITHSONIAN  TABLE*. 


106 


TABLE  22. 
DETERMINATION    OF    HEIGHTS    BY   THE    BAROMETER. 

ENGLISH    MEASURES. 
Correction  for  Latitude  and  Weight  of  Mercury:     z  (0.002662  cos  2^  +  0.00239). 


Lati- 
tude. 

* 

APPROXIMATE  DIFFERENCE  OF  HEIGHT  OBTAINED  FROM  TABLES  20-21. 

6000 

7000 

8000 

9000 

10000 

11000 

12000 

13000 

14000 

15000 

20000 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

0° 

+  30 

+  35 

+  40 

+  45 

+  51 

+  56 

+  61 

+  66 

+  71 

+  76 

+  101 

2 

30 

35 

40 

45 

50 

56 

61 

66 

7i 

76 

101 

4 

30 

35 

40 

45 

50 

56 

60 

65 

70 

75 

101 

6 

30 

35 

40 

45 

50 

55 

60 

65 

70 

75 

100 

8 

30 

35 

40 

45 

49 

54 

59 

64 

69 

74 

99 

10 

+  29 

+  34 

+  39 

+  44 

+  49 

+  54 

+  59 

+  64 

+  68 

+  73 

+  98 

12 

29 

34 

39 

43 

48 

53 

58 

63 

68 

72 

96 

14 

28 

33 

38 

43 

47 

52 

57 

62 

66 

71 

95 

16 

28 

33 

37 

42 

46 

5i 

56 

60 

65 

70 

93 

18 

27 

32 

36 

4i 

45 

50 

55 

59 

64 

68 

9i 

20 

+  27 

+  31 

+  35 

+  40 

+  44 

+  49 

+  53 

+  58 

+  62 

+  66 

+  89 

22 

26 

30 

34 

39 

43 

47 

52 

56 

60 

65 

86 

24 

25 

29 

33 

38 

42 

46 

50 

54 

58 

63 

83 

26 

24 

28 

32 

36 

40 

44 

48 

52 

56 

60 

81 

28 

23 

27 

3i 

35 

39 

43 

47 

50 

54 

58 

78 

30 

+  22 

+  26 

+  30 

+  33 

+  37 

+  4i 

+  45 

+  48 

+  52 

+  56 

+  74 

32 

21 

25 

28 

32 

36 

39 

43 

46 

50 

53 

7i 

34 

2O 

24 

27 

30 

34 

37 

4i 

44 

47 

5i 

68 

36 

19 

22 

26 

29 

32 

35 

39 

42 

45 

48 

64 

38 

18 

21 

24 

27 

30 

33 

36 

39 

42 

46 

61 

40 

+  17 

+  20 

+  23 

+  26 

+  29 

+  3i 

+  34 

+  37 

+  40 

+  43 

+  57 

42 

16 

19 

21 

24 

27 

29 

32 

35 

37 

40 

53 

44 

15 

17 

20 

22 

25 

27 

30 

32 

35 

37 

50 

45 

+  14 

+  17 

+  19 

+  22 

+  24 

+  26 

+  29 

+  3i 

+  33 

+  36 

+  48 

46 

+  14 

+  16 

+  18 

+  21 

+  23 

+  25 

+  28 

+  30 

+  32 

+  35 

+  46 

48 

13 

15 

17 

19 

21 

23 

25 

27 

30 

32 

42 

50 

12 

13 

15 

17 

19 

21 

23 

25 

27 

29 

39 

52 

+  10 

+  12 

+  14 

+  16 

+  17 

+  19 

+  21 

+  23 

+  24 

+  26 

+  35 

54 

9 

II 

13 

14 

16 

17 

19 

20 

22 

24 

31 

56 

8 

10 

II 

13 

14 

15 

17 

18 

20 

21 

28 

58 

7 

9 

IO 

II 

12 

13 

15 

16 

17 

18 

24 

60 

6 

7 

8 

10 

II 

12 

13 

14 

15 

16 

21 

62 

+  5 

+  6 

+  7 

+  8 

+  9 

+  10 

+  H 

+  12 

+  13 

+  14 

+  18 

64 

5 

5 

6 

7 

8 

8 

9 

10 

II 

ii 

15 

66 

4 

4 

5 

5 

6 

7 

7 

8 

9 

9 

12 

68 

3 

3 

4 

4 

5 

5 

6 

6 

7 

7 

IO 

70 

2 

2 

3 

3 

4 

4 

4 

5 

5 

5 

7 

72 

+  I 

+  2 

+  2 

+  2 

+  2 

74 

+  I 

+  I 

+  I 

+  i 

+  i 

76 

O 

0 

O 

o 

o 

78 

o 

0 

0 

0 

0 

80 

—  I 

—  I 

—  I 

—  I 

—  I 

SMITHSONIAN  TABLES. 


107 


TABLE  23. 

DETERMINATION    OF    HEIGHTS    BY   THE    BAROMETER. 

ENGLISH    MEASURES. 
Correction    for   an    Average    Degree    of    Humidity. 


Mean 
Temper 
ature. 

APPROXIMATE  DIFFERENCE  OF  HEIGHT  OBTAINED  FROM  TABLES  2O-21. 

500 

1000 

2000 

3000 

4000 

5000 

6000 

7000 

8000 

9000 

10000 

20000 

F. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

-20° 

O 

O 

O 

O 

O 

O 

O 

-}-I 

+  1 

-f-I 

+  1 

+  2 

-16 

O 

o 

0 

+  1 

-f  I 

+  1 

+  1 

I 

2 

2 

2 

4 

—  12 

O 

0 

+  1 

I 

I 

2 

2 

2 

3 

3 

3 

6 

-  8 

o 

0 

I 

I 

2 

2 

3 

3 

4 

4 

4 

9 

-  6 

o 

o 

I 

I 

2 

2 

3 

3 

4 

4 

5 

10 

-  4 

o 

+  1 

I 

2 

2 

3 

3 

4 

4 

5 

6 

n 

—  2 

0 

I 

I 

2 

2 

3 

4 

4 

5 

6 

6 

12 

0 

o 

I 

I 

2 

3 

3 

4 

5 

5 

6 

7 

14 

+  2 

o 

I 

I 

2 

3 

4 

4 

5 

6 

7 

7 

15 

4 

o 

I 

2 

2 

3 

4 

5 

6 

7 

7 

8 

16 

6 

0 

2 

3 

4 

4 

5 

6 

7 

8 

9 

18 

8 

0 

2 

3 

4 

5 

6 

7 

8 

9 

10 

19 

10 

+  1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

21 

12 

I 

2 

3 

4 

6 

7 

8 

9 

10 

n 

22 

14 

I 

2 

4 

5 

6 

7 

8 

9 

ii 

12 

24 

16 

I 

3 

4 

5 

6 

8 

9 

10 

n 

13 

25 

18 

I 

3 

4 

5 

7 

8 

9 

ii 

12 

13 

27 

20 

I 

I 

3 

4 

6 

7 

9 

10 

ii 

13 

14 

29 

22 

I 

2 

3 

5 

6 

8 

9 

ii 

12 

14 

15 

31 

24 

I 

2 

3 

5 

7 

8 

10 

ii 

13 

15 

16 

33 

26 

I 

2 

3 

5 

7 

9 

10 

12 

14 

16 

17 

35 

28 

I 

2 

4 

6 

7 

9 

ii 

13 

15 

17 

19 

37 

30 

I 

2 

4 

6 

8 

10 

12 

14 

16 

18 

20 

41 

32 

I 

2 

4 

7 

9 

ii 

13 

16 

18 

20 

22 

44 

34 

I 

2 

5 

7 

10 

12 

15 

17 

19 

22 

24 

49 

36 

I 

3 

5 

8 

ii 

13 

16 

19 

21 

24 

27 

53 

38 

I 

3 

6 

9 

12 

15 

18 

21 

23 

26 

29 

59 

40 

2 

3 

6 

10 

13 

16 

19 

23 

26 

29 

32 

64 

42 

2 

4 

7 

ii 

14 

18 

21 

25 

28 

32 

35 

44 

2 

4 

8 

12 

15 

19 

23 

27 

31 

35 

39 

77 

46 

2 

4 

8 

13 

17 

21 

25 

29 

34 

38 

42 

84 

48 

2 

5 

9 

14 

18 

23 

27 

32 

37 

46 

92 

50 

2 

5 

10 

15 

20 

25 

30 

35 

40 

45 

50 

99 

52 
54 

3 
3 

5 
6 

ii 
ii 

16 
17 

21 
23 

27 
29 

32 

34 

37 
40 

9 

48 

53 
57 

107 
114 

56 

3 

6 

12 

18 

24 

30 

37 

43 

49 

55 

61 

122 

58 

3 

6 

13 

19 

26 

32 

39 

45 

52 

58 

65 

130 

60 

3 

7 

14 

21 

27 

34 

41 

48 

55 

62 

69 

137 

62 

4 

7 

14 

22 

29 

36 

43 

51 

58 

65 

72 

145 

64 

4 

8 

15 

23 

30 

38 

46 

53 

61 

69 

76 

152 

66 

4 

8 

16 

24 

32 

40 

48 

56 

64 

72 

80 

160 

68 

4 

8 

17 

25 

34 

42 

50 

59 

67 

76 

84 

168 

70 

4 

9 

18 

26 

35 

44 

53 

61 

70 

79 

88 

175 

72 

5 

9 

18 

27 

37 

46 

55 

64 

73 

82 

91 

183 

76 

5 

10 

20 

30 

40 

49 

59 

69 

79 

89 

99 

198 

80 

84 

ii 
ii 

21 
23 

32 

34 

9 

53 
57 

64 
68 

85 

96 
103 

106 
114 

213 
228 

88 

6 

12 

24 

37 

49 

61 

73 

85 

97 

no 

122 

243 

92 
96 

6 

7 

13 
14 

26 
27 

39 

52 
55 

n 

EJ 

96 

103 
no 

116 
123 

129 

137 

259 
274 

SMITHSONIAN  TABLES. 


108 


TABLE  24. 
DETERMINATION    OF    HEIGHTS    BY   THE    BAROMETER. 

ENGLISH    MEASURES. 

Correction  for  the  Variation  of  Gravity  with  Altitude : 

/c 


Approx 
imate 
differenc 
of 
height. 
Z. 

HEIGHT  OF  I,OWER  STATION  IN  FEET   (h0}. 

0 

1000 

2000 

3000 

4000 

5000 

6000 

7000 

8000 

9000 

IOOOG 

12000 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

500 

0 

0 

0 

0 

0 

0 

O 

O 

0 

O 

0 

+  1 

1000 

0 

0 

0 

O 

O 

+  1 

+  1 

+  1 

+  1 

+  1 

+  1 

I 

1500 

O 

0 

O 

+  i 

+  1 

I 

I 

I 

I 

I 

2 

2 

2000 

o 

0 

+  1 

I 

I 

I 

I 

2 

2 

2 

2 

2 

2500 

0 

+  i 

I 

I 

I 

I 

2 

2 

2 

2 

3 

3 

3000 

0 

I 

I 

I 

2 

2 

2 

2 

3 

3 

3 

4 

3500 

+  1 

I 

I 

2 

2 

2 

3 

3 

3 

4 

4 

5 

4000 

I 

I 

2 

2 

2 

3 

3 

3 

4 

4 

5 

5 

4500 

I 

I 

2 

2 

3 

3 

4 

4 

4 

5 

5 

6 

5000 

I 

2 

2 

3 

3 

4 

4 

5 

5 

6 

6 

7 

55oo 

I 

2 

3 

3 

4 

4 

5 

5 

6 

6 

7 

8 

6000 

2 

2 

3 

3 

4 

5 

5 

6 

6 

7 

7 

9 

6500 

2 

3 

3 

4 

5 

5 

6 

6 

7 

8 

8 

9 

7000 

2 

3 

4 

4 

5 

6 

6 

7 

8 

8 

9 

10 

7500 

3 

3 

4 

5 

6 

6 

7 

8 

8 

9 

10 

ii 

8000 

3 

4 

5 

5 

6 

7 

8 

8 

9 

10 

ii 

12 

8500 

3 

4 

5 

6 

7 

8 

8 

9 

10 

ii 

12 

13 

9000 

4 

5 

6 

6 

7 

8 

9 

10 

ii 

12 

12 

14 

9500 

4 

5 

6 

7 

8 

9 

10 

ii 

12 

13 

13 

15 

10000 

5 

6 

7 

8 

9 

10 

ii 

ii 

12 

13 

14 

16 

IIOOO 

6 

7 

8 

9 

10 

ii 

12 

13 

14 

15 

16 

18 

12000 

7 

8 

9 

10 

ii 

13 

14 

15 

16 

17 

18 

21 

13000 

8 

9 

ii 

12 

J3 

14 

16 

17 

18 

19 

21 

23 

14000 

9 

ii 

12 

13 

15 

16 

17 

19 

20 

21 

23 

25 

15000 

ii 

12 

14 

15 

17 

18 

19 

21 

22 

24 

25 

28 

16000 

12 

14 

15 

17 

18 

20 

21 

23 

25 

26 

28 

31 

17000 

14 

15 

17 

19 

20 

22 

24 

25 

27 

28 

30 

18000 

16 

17 

19 

21 

22 

24 

26 

28 

30 

31 

19000 

17 

19 

21 

23 

25 

26 

28 

30 

32 

20000 

19 

21 

23 

25 

27 

29 

31 

SMITHSONIAN  TABLES. 


109 


TABLE  25. 

DETERMINATION    OF    HEIGHTS    BY   THE    BAROMETER. 

METRIC    MEASURES. 
Values  of  18400   log 


Barometric 
Pressure. 

0 

• 

2 

3 

4 

5 

6 

7 

8 

9 

mm. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

300 

7428 

7401 

7375 

7348 

7322 

7296 

7270 

7244 

7218 

7192 

310 

7166 

7140 

7H5 

7089 

7064 

7038 

7013 

6987 

6962 

6937 

320 

6912 

6887 

6862 

6838 

6813 

6789 

6764 

6740 

6715 

6691 

33° 

6666 

6642 

6618 

6594 

6570 

6546 

6522 

6498 

6475 

6451 

340 

6428 

6405 

6381 

6358 

6334 

6311 

6288 

6265 

6242 

6219 

350 

6196 

6173 

6151 

6128 

6106 

6083 

6o6l 

6038 

6016 

5993 

360 

597i 

5949 

5927 

5905 

5883 

5861 

5839 

5817 

5795 

5773 

370 

5752 

5730 

5709 

5687 

5666 

5644 

5623 

5602 

558i 

556o 

380 

5539 

5497 

5476 

5455 

5434 

54H 

5393 

5373 

5352 

390 

5332 

53" 

5291 

5270 

5250 

5229 

5209 

5189 

5169 

5H9 

400 

5129 

5109 

5089 

5069 

5049 

5029 

5010 

4990 

497i 

4951 

410 

4932 

4912 

4893 

4873 

4854 

4834 

4815 

4796 

4777 

4758 

420 

4739 

4720 

4701 

4682 

4663 

4644 

4625 

4606 

4588 

4569 

430 

455i 

4532 

4514 

4495 

4477 

4458 

4440 

4422 

4404 

4386 

440 

4368 

4350 

4332 

4314 

4296 

4278 

4260 

4242 

4224 

4206 

450 

4188 

4170 

4152 

4134 

4117 

4099 

4082 

4064 

4047 

4029 

460 

4012 

3994 

3977 

3959 

3942 

3925 

3908 

3791 

3774 

3757 

470 

3840 

3823 

3806 

3789 

3772 

3755 

3738 

3721 

3705 

3688 

480 

3672 

3655 

3639 

3622 

3606 

3589 

3573 

3556 

3540 

3523 

490 

3507 

3490 

3474 

3458 

3442 

3426 

34io 

3394 

3378 

3362 

500 

3346 

3330 

3314 

3298 

3282 

3266 

3250 

3235 

3219 

3203 

510 

3188 

3172 

3157 

3*41 

3126 

3110 

3095 

3079 

3064 

3048 

520 

3033 

3017 

3002 

2986 

2971 

2955 

2940 

2925 

2910 

2895 

530 

2880 

2865 

2850 

2835 

2820 

2805 

2790 

2775 

2760 

2745 

540 

2731 

2716 

2701 

2687 

2672 

2657 

2643 

2628 

2613 

2599 

550 

2584 

2570 

2555 

2541 

2526 

2512 

2497 

2483 

2468 

2454 

560 

2440 

2426 

2411 

2397 

2383 

2369 

2355 

2341 

2327 

2313 

570 

2299 

2285 

2271 

2257 

2243 

2229 

2215 

2201 

2188 

2174 

580 

2160 

2146 

2133 

2119 

2105 

2092 

2078 

2064 

2051 

2037 

59° 

2023 

2010 

1996 

1983 

1969 

1956 

1942 

1929 

1915 

1902 

600 

1889 

1875 

1862 

1848 

1835 

1822 

1809 

1796 

1783 

1770 

610 

1757 

1744 

1731 

1718 

1705 

1692 

1679 

1666 

1653 

1640 

620 

1627 

1601 

1588 

1576 

1563 

1550 

1537 

1525 

1512 

630 

1499 

I486 

1474 

1461 

1448 

1436 

1423 

I4II 

1398 

1386 

640 

1373 

I36l 

1348 

1336 

1323 

1311 

1298 

1286 

1273 

1261 

650 

1249 

1236 

1224 

1212 

1199 

1187 

H75 

1163 

1151 

H39 

660 

1127 

IH5 

1103 

1091 

1079 

1067 

1055 

1043 

1031 

1019 

670 

1007 

995 

983 

971 

960 

948 

936 

924 

913 

901 

680 

889 

877 

866 

854 

842 

831 

819 

807 

796 

784 

690 

772 

761 

749 

738 

726 

715 

703 

692 

680 

669 

700 

657 

646 

635 

623 

612 

601 

589 

578 

567 

555 

710 

544 

533 

521 

510 

499 

487 

476 

465 

454 

443 

720 

432 

421 

410 

399 

388 

377 

366 

355 

344 

333 

730 

322 

300 

289 

278 

267 

256 

245 

234 

224 

740 

213 

202 

192 

181 

170 

160 

149 

138 

128 

117 

750 

+  106 

+  95 

+  85 

+  74 

+  64 

+  53 

-r-  43 

+  32 

+  22 

+  ii 

760 

0 

—  IO 

—  21 

-  3i 

-  42 

-  52 

—  63 

-  73 

—  83 

-  94 

770 

—  104 

-"5 

-125 

-136 

—  146 

-156 

-166 

-177 

-187 

-197 

SMITHSONIAN  TABLES. 


IIO 


TABLE  26. 
DETERMINATION    OF    HEIGHTS    BY   THE    BAROMETER. 

METRIC    MEASURES. 
Term  for  Temperature  :   0.00367  0  X  z. 


For  temperatures  j  jje{^  °o  c*  }  the  values  are  to  be  j  subtracted 

Approx 

imate 

MEAN  TEMPERATURE  OF  AIR  COLUMN  IN  CENTIGRADE  DEGREES  (0}. 

differ- 

ence of 

height. 

10 

2° 

3° 

4° 

5° 

6° 

7° 

8° 

9° 

10° 

20° 

30° 

40° 

Z. 

m. 

m. 

m. 

m. 

m. 

tn. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

100 

O 

I 

I 

I 

2 

2 

3 

3 

3 

4 

7 

II 

15 

200 

I 

I 

2 

3 

4 

4 

5 

6 

7 

7 

15 

22 

29 

300 

I 

2 

3 

4 

6 

7 

8 

9 

10 

ii 

22 

33 

44 

400 

I 

3 

4 

6 

7 

9 

10 

12 

13 

15 

29 

44 

59 

500 

600 

2 
2 

4 
4 

6 

7 

7 
9 

9 
ii 

ii 
13 

13 
15 

15 

18 

17 

20 

18 

22 

37 
44 

55 
66 

i 

700 

3 

5 

8 

10 

13 

15 

18 

21 

23 

26 

77 

103 

800 

3 

6 

9 

12 

15 

18 

21 

23 

26 

29 

59 

88 

117 

900 

3 

7 

10 

13 

17 

20 

23 

26 

30 

33 

66 

99 

132 

1000 

4 

7 

ii 

15 

18 

22 

26 

29 

33 

37 

73 

IIO 

147 

1  100 

4 

8 

12 

16 

20 

24 

28 

32 

36 

40 

81 

121 

161 

1  200 

4 

9 

13 

18 

22 

26 

31 

35 

40 

44 

88 

132 

176 

1300 
1400 

5 
5 

10 
IO 

14 
15 

19 

21 

24 
26 

29 
31 

$ 

38 

43 
46 

48 

95 
103 

143 
154 

191 
206 

1500 

6 

ii 

17 

22 

28 

33 

39 

44 

50 

55 

IIO 

165 

220 

1600 

6 

12 

18 

23 

29 

35 

47 

53 

59 

117 

I76 

235 

1700 

6 

12 

19 

25 

31 

37 

44 

50 

56 

62 

125 

I87 

250 

1800 

7 

13 

20 

26 

33 

40 

46 

53 

59 

66 

132 

I98 

264 

1900 

7 

14 

21 

28 

35 

42 

49 

56 

63 

70 

139 

209 

279 

2000 

7 

15 

22 

29 

37 

44 

5i 

59 

66 

73 

147 

220 

294 

2IOO 

8 

15 

23 

31 

39 

46 

54 

62 

69 

77 

154 

231 

308 

2200 
2300 

8 
8 

16 

17 

24 
25 

32 

34 

40 

42 

48 

57 
59 

68 

73 
76 

81 

84 

161 
169 

242 
253 

III 

2400 

9 

18 

26 

35 

44 

53 

62 

70 

79 

88 

176 

264 

352 

2500 

9 

18 

28 

37 

46 

55 

64 

73 

83 

92 

184 

275 

367 

2600 

10 

19 

29 

38 

48 

57 

67 

76 

86 

95 

191 

286 

382 

2700 

10 

20 

30 

40 

50 

59 

69 

79 

89 

99 

198 

297 

396 

2800 

IO 

21 

31 

41 

62 

72 

82 

92 

103 

206 

308 

411 

2900 

II 

21 

32 

43 

53 

64 

75 

85 

96 

106 

213 

319 

426 

3000 

II 

22 

33 

44 

55 

66 

77 

88 

99 

1  10 

220 

330 

440 

3100 

II 

23 

34 

46 

57 

68 

80 

9* 

1  02 

114 

228 

341 

455 

3200 

12 

23 

35 

47 

59 

70 

82 

94 

106 

117 

235 

352 

470 

3300 

12 

24 

36 

48 

61 

73 

85 

97 

109 

121 

242 

363 

484 

3400 

12 

25 

37 

50 

62 

75 

87 

100 

112 

125 

250 

374 

499 

3500 

13 

26 

39 

5i 

64 

77 

90 

103 

116 

128 

257 

385 

514 

3600 

13 

26 

40 

53 

66 

79 

92 

106 

119 

132 

264 

396 

528 

3700 

14 

27 

41 

54 

68 

81 

95 

109 

122 

I36 

272 

407 

543 

3800 

14 

28 

42 

56 

70 

84 

98 

112 

126 

139 

279 

418 

558 

3900 

14 

29 

43 

57 

72 

86 

100 

H5 

I29 

143 

286 

429 

573 

4000 

15 

29 

44 

59 

73 

88 

103 

117 

132 

147 

294 

440 

587 

5000 
6000 

18 

22 

37 
44 

55 
66 

It 

92 

1  10 

no 
132 

128 
154 

147 
I76 

165 
I98 

183 
220 

367 
440 

55i 
661 

734 
881 

7000 

26 

51 

77 

103 

128 

154 

180 

206 

231 

257 

514 

771 

1028 

SMITHSONIAN  TABLES. 


Ill 


TABLE  27. 

DETERMINATION    OF    HEIGHTS    BY   THE    BAROMETER. 

METRIC    MEASURES. 
Correction    for    Humidity:     Values   of  10000/3. 

^  =  0.378^0.378^-. 


Mean 
Vapor 
Pressure. 

f+fo 

e=-y- 

MEAN  BAROMETRIC  PRESSURE  IN  MILLIMETRES  (  - 

B  +  B 

•).. 

2 

500 

520 

540 

560 

580 

600 

620 

640 

660 

680 

700 

720 

740 

760 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

tarn. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

| 

8 

7 

7 

7 

7 

6 

6 

6 

6 

6 

5 

5 

5 

5 

2 

15 

15 

14 

14 

13 

13 

12 

12 

n 

n 

n 

II 

10 

10 

3 

23 

22 

21 

20 

20 

19 

18 

18 

17 

17 

16 

16 

15 

15 

4 

30 

29 

28 

27 

26 

25 

24 

24 

23 

22 

22 

21 

20 

20 

5 

38 

36 

35 

34 

33 

31 

30 

30 

29 

28 

27 

26 

26 

25 

6 

45 

44 

42 

39 

38 

37 

35 

34 

33 

32 

32 

31 

30 

7 

53 

51 

49 

47 

46 

44 

43 

40 

39 

38 

37 

36 

35 

8 

60 

58 

56 

54 

52 

50 

49 

47 

46 

44 

43 

42 

41 

40 

9 

68 

65 

63 

61 

59 

57 

55 

53 

52 

50 

49 

47 

46 

45 

10 

76 

73 

70 

68 

65 

63 

61 

59 

57 

56 

54 

53 

51 

50 

n 

83 

80 

77 

74 

72 

69 

67 

65 

63 

61 

59 

58 

56 

55 

12 

91 

87 

84 

81 

78 

76 

73 

69 

67 

65 

63 

61 

60 

13 

98 

95 

91 

88 

85 

82 

79 

77 

74 

72 

70 

68 

66 

65 

14 

106 

102 

98 

95 

88 

85 

83 

80 

78 

76 

74 

72 

70 

15 

H3 

109 

105 

101 

98 

95 

9i 

89 

86 

83 

81 

79 

77 

75 

16 

121 

116 

112 

108 

104 

IOI 

98 

94 

92 

89 

86 

84 

82 

80 

17 

129 

124 

119 

115 

in 

107 

104 

100 

97 

94 

92 

89 

87 

85 

18 

136 

126 

122 

117 

no 

106 

103 

100 

97 

95 

92 

90 

19 

144 

138 

133 

128 

124 

120 

116 

112 

109 

106 

103 

100 

97 

95 

20 

151 

145 

140 

135 

130 

126 

122 

118 

H5 

in 

108 

105 

102 

99 

21 

J59 

153 

147 

142 

137 

132 

128 

124 

120 

117 

113 

no 

107 

104 

22 

1  66 

160 

154 

I49 

143 

139 

134 

130 

126 

122 

119 

116 

112 

109 

23 

174 

167 

161 

155 

150 

145 

I4O 

136 

132 

128 

124 

121 

117 

114 

24 

181 

174 

168 

162 

156 

146 

142 

137 

133 

130 

126 

I23 

119 

25 

189 

182 

175 

I69 

163 

157 

152 

148 

143 

139 

135 

131 

128 

124 

26 

197 

189 

182 

175 

169 

164 

159 

154 

149 

145 

140 

137 

133 

129 

27 

204 

196 

189 

182 

176 

170 

165 

159 

155 

150 

146 

142 

138 

134 

28 

212 

204 

196 

I89 

182 

176 

171 

165 

160 

156 

151 

147 

143 

139 

29 

2I9 

211 

203 

I96 

189 

183 

177 

171 

166 

161 

157 

152 

148 

144 

30 

227 

218 

210 

203 

196 

189 

183 

177 

172 

167 

162 

158 

153 

149 

31 

234 

225 

217 

209 

202 

195 

I89 

183 

178 

172 

167 

163 

158 

154 

32 

242 

233 

224 

216 

209 

202 

195 

189 

183 

178 

173 

168 

I63 

159 

33 

249 

240 

231 

223 

215 

208 

2OI 

195 

189 

183 

178 

173 

I69 

164 

34 

257 

247 

238 

230 

222 

214 

207 

2OI 

195 

189 

184 

179 

174 

169 

35 

265 

254 

245 

236 

228 

220 

213 

207 

200 

195 

189 

184 

179 

174 

36 

272 

262 

252 

243 

235 

227 

2I9 

213 

206 

200 

194 

189 

184 

179 

37 

280 

269 

259 

250 

241 

233 

226 

219 

212 

206 

200 

194 

I89 

184 

38 

287 

276 

266 

257 

248 

239 

232 

224 

218 

211 

205 

200 

194 

189 

39 

295 

283 

273 

263 

254 

246 

238 

230 

223 

217 

211 

205 

I99 

194 

40 

302 

291 

280 

270 

26l 

252 

244 

236 

229 

222 

216 

210 

204 

199 

SMITHSONIAN  TABLES. 


112 


TABLE  27, 
DETERMINATION    OF    HEIGHTS    BY   THE    BAROMETER. 

METRIC    MEASURES. 
Correction   for   Humidity:    looooygxz. 

Top  argument:     Values  of  10000  ft  obtained  from  page  na. 
Side  argument :     Approximate  difference  of  height  (z). 


Approximate 
Difference 
of  Height. 
Z. 

10000/3. 

25 

50 

75 

100 

125 

150 

175 

200 

225 

250 

275 

300 

m. 

m. 

m. 

m. 

m. 

in. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

100 

0-3 

0-5 

0.8 

I.O 

i-3 

1.5 

1.8 

2.0 

2-3 

2-5 

2.8 

3.0 

200 

0-5 

I.O 

1.5 

2.0 

2-5 

3-0 

3-5 

4.0 

4-5 

5-0 

5-5 

6.0 

300 

0.8 

i-5 

2.3 

3-o 

3-8 

4-5 

5-3 

6.0 

6.8 

7-5 

8.3 

9.0 

400 

I.O 

2.0 

3-0 

4.0 

5-o 

6.0 

7-0 

8.0 

9.0 

IO.O 

II.O 

,     12.0 

500 

1-3 

2-5 

3-8 

5-0 

6.3 

7-5 

8.8 

IO.O 

"•3 

12.5 

13.8 

15.0 

600 

i-5 

3-o 

4-5 

6.0 

7-5 

9.0 

10.5 

12.0 

13.5 

15.0 

16.5 

18.0 

700 

1.8 

3-5 

5-3 

7.0 

8.8 

10.5 

12.3 

14.0 

15.8 

17.5 

19.3 

21.  0 

800 

2.0 

4.0 

6.0 

8.0 

IO.O 

12.0 

14.0 

16.0 

18.0 

20.  o 

22.0 

24.O 

900 

2-3 

4-5 

6.8 

9.0 

"•3 

13.5 

15-8 

18.0 

20.3 

22.5 

24.8 

27.0 

1000 

2-5 

5-0 

7-5 

IO.O 

12.5 

15.0 

17.5 

20.  0 

22.5 

25.0 

27.5 

30.0 

IIOO 

2.8 

5-5 

8-3 

II.O 

13-8 

16.5 

19-3 

22.0 

24.8 

27.5 

30.3 

33-0 

1200 

3-o 

6.0 

9.0 

12.0 

15-0 

18.0 

21.0 

24.0 

27.0 

30.0 

33-0 

36.0 

1300 

3-3 

6.5 

9.8 

13.0 

16.3 

19.5 

22.8 

26.O 

29-3 

32.5 

35-8 

39-0 

1400 

3-5 

7.0 

10.5 

I4.O 

17.5 

21.  0 

24-5 

28.0 

31.5 

35.0 

38.5 

42.0 

1500 

3-8 

7-5 

"•3 

15-0 

18.8 

22.5 

26.3 

30.0 

33-8 

37.5 

4L3 

45-0 

1600 

4.0 

8.0 

12.  0 

16.0 

20.  o 

24.0 

28.0 

32.0 

36.0 

40.0 

44.0 

48.0 

1700 

4-3 

8.5 

12.8 

17.0 

21.3 

25-5 

29.8 

34-0 

38.3 

42.5 

46.8 

51.0 

1800 

4-5 

9.0 

13-5 

18.0 

22.5 

27.0 

31-5 

36.0 

40.5 

45.0 

49-5 

54.0 

1900 

4.8 

9-5 

14-3 

19.0 

23.8 

28.5 

33-3 

38.0 

42.8 

47.5 

52.3 

57-0 

2000 

5-o 

IO.O 

15-0 

20.0 

25-0 

30.0 

35-0 

40.0 

45-0 

50.0 

55.o 

60.0 

2100 

5-3 

10.5 

15-8 

21.0 

26.3 

3L5 

36.8 

42.0 

47-3 

52.5 

57.8 

63-0 

2200 

5-5 

II.O 

I6.5 

22.0 

27-5 

33-o 

38.5 

44.0 

49-5 

55-o 

60.5 

66.0 

2300 

5-8 

11.5 

17-3 

23.0 

28.8 

34-5 

40-3 

46.0 

51-8 

57-5 

63.3 

69.0 

24OO 

6.0 

12.  0 

18.0 

24.0 

30.0 

36.0 

42.O 

48.0 

54-0 

60.0 

66.0 

72.0 

2500 

6.3 

12.5 

18.8 

25.0 

31.3 

37-5 

43-8 

50.0 

56.3 

62.5 

68.8 

75-0 

2600 

6-5 

13.0 

*9-5 

26.O 

32.5 

39-0 

45-5 

52.0 

58.5 

65.0 

7L5 

78.0 

2700 
2800 

6.8 

7.0 

13.5 
I4.O 

20.3 

21.  0 

27.O 
28.0 

33-8 
35-0 

40.5 
42.0 

47-3 
49.0 

54-o 
56.0 

60.8 
63.0 

67.5 
70.0 

74-3 
77.0 

81.0 
84.0 

2900 

7-3 

14-5 

21.8 

29.0 

36.3 

43-5 

50.8 

58.0 

65.3 

72.5 

79.8 

87.0 

3000 

7-5 

15.0 

22.5 

30.0 

37-5 

45-0 

52.5 

60.0 

67.5 

75.o 

82.5 

90.0 

3100 
3200 

7-8 
8.0 

15-5 

16.0 

23-3 
24.0 

31-0 
32.0 

38.8 
40.0 

46.5 
48.0 

54-3 
56.0 

62.0 
64.0 

69.8 
72.0 

77-5 
80.0 

85.3 
88.0 

93-0 
96.0 

3300 

8.3 

16.5 

24.8 

33-0 

41.3 

49-5 

57-8 

66.0 

74-3 

82.5 

90.8 

99.0 

3400 

8-5 

17.0 

25.5 

34-0 

42.5 

51.0 

59-5 

68.0 

76.5 

85.0 

93-5 

102.0 

3500 

8.8 

17-5 

26.3 

35-0 

43-8 

52.5 

61.3 

70.0 

78.8 

87.5 

96.3 

105.0 

3600 

9.0 

18.0 

27.0 

36.0 

45-0 

54-0 

63.0 

72.0 

81.0 

90.0 

99-o 

108.0 

3700 

9-3 

18.5 

27.8 

37-0 

46.3 

55-5 

64.8 

74.0 

83.3 

92.5 

101.8 

III.O 

3800 

9-5 

19.0 

28.5 

38.0 

47-5 

57-0 

66.5 

76.0 

85.5 

95-o 

104.5 

114.0 

3900 

9-8 

19-5 

29.3 

39-0 

48.8 

58.5 

68.3 

78.0 

87.8 

97.5 

107.3 

117.0 

4000 

IO.O 

20.  o 

30.0 

40.0 

50.0 

60.0 

70.0 

80.0 

90.0 

100.  0 

I  IO.O 

120.0 

5000 

12.5 

25-0 

37-5 

50.0 

62.5 

75-0 

87.5 

100.0 

112.5 

125.0 

137.5 

150.0 

6000 

15-0 

30.0 

45-0 

60.0 

75.o 

90.0 

105.0 

120.0 

135-0 

150.0 

165.0 

ISO.O 

7000 

17-5 

35-0 

52.5 

70.0 

87.5 

105.0 

122.5 

140.0 

157.5 

175.0 

192.5 

2  IO.O 

SMITHSONIAN  TABLES. 


TABLE  28. 

DETERMINATION    OF    HEIGHTS    BY   THE    BAROMETER 

METRIC    MEASURES. 
Correction    for    Latitude   and    Weight   of    Mercury:    z  (0.002662  it?.?  2  </>  4- 0.00239). 


Approximate 
difference 
of  Height. 

LATITUDE  (<£). 

Z. 

0° 

5° 

10° 

15° 

20° 

25° 

30° 

35° 

40° 

45° 

50° 

55° 

60° 

65° 

70° 

75° 

metres. 

m. 

in. 

tn. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

100 

I 

I 

O 

0 

0 

O 

O 

0 

0 

0 

0 

0 

0 

0 

0 

0 

2OO 

I 

I 

I 

O 

o 

o 

O 

o 

o 

o 

300 

2 

I1 

i 

o 

O 

o 

o 

o 

400 

500 

2 

3 

2 

3 

2 

2 

2 

2 
2 

• 

2 

, 

2 

2 

I 

I 

i 

o 

o 
o 

o 

0 

o 
o 

600 

3 

3 

3 

3 

3 

2 

2 

2 

2 

I 

I 

0 

0 

o 

700 
800 

4 

4 

3 

3 

3 

3 

3 

2 

2 
2 

2 
2 

i 

2 

0 

0 

o 

0 

o 

900 

5 

5 

4 

4 

4 

4 

3 

3 

3 

2 

2 

0 

0 

1000 

5 

5 

5 

5 

4 

4 

4 

3 

3 

2 

2 

I 

o 

0 

IIOO 

6 

6 

5 

5 

5 

5 

4 

4 

3 

3 

2 

2 

o 

0 

1  200 

6 

6 

6 

6 

5 

5 

4 

4 

3 

3 

2 

2 

I 

o 

o 

1300 

7 

7 

6 

6 

6 

5 

5 

4 

4 

3 

3 

2 

I 

o 

o 

1400 

7 

7 

7 

7 

6 

6 

5 

5 

4 

3 

3 

2 

I 

0 

o 

1500 

8 

8 

7 

7 

7 

6 

6 

5 

4 

4 

3 

2 

2 

I 

I 

0 

1600 

8 

8 

8 

8 

7 

7 

6 

5 

5 

4 

3 

2 

2 

I 

I 

0 

1700 

9 

9 

8 

8 

8 

7 

6 

6 

5 

4 

3 

3 

2 

I 

I 

0 

1800 

9 

9 

9 

8 

8 

7 

7 

6 

5 

4 

3 

3 

2 

I 

I 

o 

1900 

10 

10 

9 

9 

8 

8 

7 

6 

5 

5 

4 

3 

2 

I 

I 

o 

2000 

10 

IO 

IO 

9 

9 

8 

7 

7 

6 

5 

4 

3 

2 

I 

0 

2100 

ii 

II 

IO 

10 

9 

9 

8 

7 

6 

5 

4 

3 

2 

I 

0 

2200 

ii 

II 

ii 

10 

10 

9 

8 

7 

6 

5 

4 

3 

2 

I 

o 

2300 

12 

12 

ii 

ii 

10 

9 

9 

8 

7 

5 

4 

3 

2 

2 

0 

2400 

12 

12 

12 

ii 

ii 

10 

9 

8 

7 

6 

5 

4 

3 

2 

0 

2500 

13 

13 

12 

12 

ii 

10 

9 

8 

7 

6 

5 

4 

3 

2 

o 

2600 

13 

13 

13 

12 

12 

ii 

10 

9 

7 

6 

5 

4 

3 

2 

o 

2700 

14 

14 

13 

13 

12 

ii 

10 

9 

8 

6 

5 

4 

3 

2 

0 

2800 

14 

14 

14 

13 

12 

ii 

10 

9 

8 

7 

5 

4 

3 

2 

o 

2900 

15 

15 

14 

14 

13 

12 

II 

10 

8 

7 

6 

4 

3 

2 

0 

3000 

15 

15 

15 

14 

13 

12 

II 

10 

9 

7 

6 

4 

3 

2 

I 

0 

3100 

16 

16 

15 

15 

14 

13 

12 

10 

9 

7 

6 

5 

3 

2 

I 

0 

3200 

16 

16 

16 

15 

14 

13 

12 

II 

9 

8 

6 

5 

3 

2 

I 

o 

33oo 

17 

17 

16 

15 

15 

14 

12 

II 

9 

8 

6 

5 

3 

2 

I 

o 

3400 

17 

17 

17 

16 

15 

14 

13 

II 

10 

8 

7 

5 

4 

2 

I 

0 

3500 

18 

18 

17 

16 

16 

14 

13 

12 

10 

8 

7 

5 

4 

2 

I 

0 

3600 

18 

18 

18 

17 

16 

15 

13 

12 

10 

9 

7 

5 

4 

2 

I 

0 

3700 

19 

!9 

18 

17 

16 

15 

14 

12 

II 

9 

7 

5 

4 

3 

I 

o 

3800 

19 

19 

19 

18 

17 

16 

14 

13 

II 

9 

7 

6 

4 

3 

I 

o 

39oo 

20 

20 

*9 

18 

17 

16 

15 

13 

II 

9 

8 

6 

4 

3 

I 

o 

4000 

2O 

20 

20 

19 

18 

16 

15 

13 

II 

IO 

8 

6 

4 

3 

I 

0 

4500 

23 

23 

22 

21 

20 

18 

17 

15 

13 

ii 

9 

7 

5 

3 

2 

o 

5000 

25 

25 

24 

23 

22 

21 

J9 

17 

14 

12 

10 

7 

5 

3 

2 

o 

55oo 

28 

28 

27 

26 

24 

23 

20 

18 

16 

13 

ii 

8 

6 

4 

2 

0 

6000 

30 

30 

29 

28 

27 

25 

22 

20 

17 

14 

12 

9 

6 

4 

2 

I 

6500 

33 

33 

32 

31 

29 

27 

24 

21 

J9 

16 

13 

10 

7 

4 

2 

I 

7000 

35 

35 

34 

33 

31 

29 

26 

23 

20 

17 

13 

10 

7 

5 

2 

I 

SMITHSONIAN  TABLES. 


TABLE  29. 
DETERMINATION    OF    HEIGHTS    BY   THE    BAROMETER. 

METRIC    MEASURES. 
Correction  for  the  variation  of  gravity  with  altitude: 


Approxi- 
mate 
difference 
of  height. 
Z. 

HEIGHT  OF  I,O  WER  STATION  IN  METRES    (^o). 

0 

200 

400 

600 

800 

1000 

1200 

1400 

1600 

1800 

2000 

2500 

3000 

4000 

metres. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

200 

o 

O 

0 

0 

0 

o 

0 

0 

0 

o 

0 

0 

0 

0 

300 

0 

0 

0 

0 

0 

o 

0 

0 

0 

o 

o 

0 

0 

0 

400 

0 

0 

0 

0 

0 

0 

0 

0 

0 

0 

o 

o 

o 

I 

500 

o 

O 

o 

O 

o 

o 

0 

0 

0 

o 

0 

0 

I 

I 

600 

0 

0 

0 

0 

0 

o 

0 

0 

0 

o 

o 

I 

I 

I 

700 

0 

0 

0 

0 

0 

0 

0 

0 

o 

0 

I 

i 

i 

I 

800 

o 

0 

0 

o 

o 

0 

o 

o 

I 

I 

I 

I 

i 

I 

900 

o 

o 

o 

o 

o 

o 

0 

I 

I 

I 

I 

i 

i 

I 

1000 

0 

0 

0 

0 

0 

0 

I 

I 

I 

i 

I 

I 

IIOO 

o 

o 

0 

o 

o 

i 

I 

I 

I 

i 

I 

2 

1200 

o 

o 

o 

o 

i 

I 

I 

I 

I 

I 

2 

1300 

0 

0 

o 

I 

i 

I 

I 

I 

I 

I 

2 

1400 

0 

0 

0 

I 

i 

I 

I 

I 

I 

2 

2 

1500 

o 

o 

I 

I 

i 

I 

I 

I 

2 

2 

2 

1600 

o 

I 

I 

I 

i 

I 

I 

i 

2 

2 

2 

1700 

0 

I 

I 

I 

i 

I 

I 

I 

2 

2 

2 

3 

1800 

I 

I 

I 

I 

i 

I 

I 

2 

2 

2 

2 

3 

1900 

I 

I 

I 

I 

i 

I 

2 

2 

2 

2 

2 

3 

2000 

I 

I 

I 

I 

i 

2 

2 

2 

2 

2 

3 

3 

2IOO 

I 

I 

I 

I 

i 

2 

2 

2 

2 

2 

3 

3 

22OO 

I 

I 

I 

I 

i 

2 

2 

2 

2 

2 

2 

3 

4 

2300 

I 

I 

I 

I 

2 

2 

2 

2 

2 

2 

3 

3 

4 

2400 

I 

I 

I 

I 

2 

2 

2 

2 

2 

2 

2 

3 

3 

4 

2500 

I 

I 

I 

I 

2 

2 

2 

2 

2 

2 

3 

3 

3 

4 

2600 

I 

I 

I 

2 

2 

2 

2 

2 

2 

3 

3 

3 

4 

4 

2700 

I 

I 

I 

2 

2 

2 

2 

2 

3 

3 

3 

3 

4 

5 

2800 

I 

I 

2 

2 

2 

2 

2 

2 

3 

3 

3 

3 

4 

5 

2900 

I 

2 

2 

2 

2 

2 

2 

3 

3 

3 

3 

4 

4 

5 

3000 

I 

2 

2 

2 

2 

2 

3 

3 

3 

3 

3 

4 

4 

5 

3100 

2 

2 

2 

2 

2 

2 

3 

3 

3 

3 

3 

4 

4 

5 

3200 

2 

2 

2 

2 

2 

3 

3 

3 

3 

3 

4 

4 

5 

6 

33oo 

2 

2 

2 

2 

3 

3 

3 

3 

3 

4 

4 

4 

5 

6 

3400 

2 

2 

2 

2 

3 

3 

3 

3 

4 

4 

4 

4 

5 

6 

3500 

2 

2 

2 

3 

3 

3 

3 

3 

4 

4 

4 

5 

5 

6 

3600 
•2700 

2 
2 

2 
2 

2 

3 

3 

3 

3 

4 

4 

4 

4 

5 

5" 

i 

7 

7" 

o/v-AJ 
3800 

2 

3 

3 

3 

3 

3 

4 

4 

4 

4 

5 

5 

O 

6 

7 

3900 

2 

3 

3 

3 

3 

4 

4 

4 

4 

5 

5 

5 

6 

7 

4000 

3 

3 

3 

3 

4 

4 

4 

4 

5 

5 

5 

6 

6 

8 

4500 

3 

3 

4 

4 

4 

5 

5 

6 

6 

7 

7 

9 

5000 

4 

4 

5 

5 

5 

5 

6 

6 

6 

7 

7 

8 

9 

10 

55oo 

5 

5 

5 

6 

6 

6 

7 

7 

8 

8 

8 

9 

10 

12 

6000 

6 

6 

6 

7 

7 

8 

8 

8 

9 

9 

9 

10 

ii 

13 

6500 

7 

7 

7 

8 

8 

9 

9 

9 

10 

10 

ii 

12 

13 

15 

7000 

8 

8 

9 

9 

9 

10 

10 

ii 

ii 

12 

12 

13 

14 

16 

SMITHSONIAN  TABLES. 


TABLE  30. 

DIFFERENCE  OF  HEIGHT  CORRESPONDING  TO  A  CHANGE  OF 

0.1    INCH    IN    THE    BAROMETER. 

ENGLISH    MEASURES. 


Baro- 
metric 
Pres- 
sure. 

MEAN  TEMPERATURE  OF  THE  AIR  IN  FAHRENHEIT  DEGREES. 

30° 

35° 

40° 

45° 

50° 

55° 

60° 

65° 

70° 

75° 

80° 

85° 

Inches 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

22.0 

119.2 

120.5 

121.  8 

123.1 

124.4 

125.8 

I27.I 

128.5 

129.8 

I3L2 

132.5 

133.9 

.2 

118.2 

119.4 

120.7 

122.  0 

123.3 

124.7 

126.0 

127.3 

128.7 

130.0 

^i-a 

132.7 

•4 

117.1 

118.3 

119.6 

I2O.9 

122.2 

123.6 

124.9 

126.2 

127.5 

128.8 

130.2 

I3L5 

.6 

116.1 

II7-3 

118.6 

II9.8 

121.  1 

122.5 

123.8 

125.1 

126.4 

127.7 

129.0 

130.3 

.8 

115.0 

116.3 

II7-5 

II8.8 

1  20.  1 

121.4 

122.7 

124.0 

125.3 

126.6 

127.9 

129.2 

23.0 

114.0 

"5-3 

116.5 

II7.8 

II9.0 

120.3 

121.  6 

122.9 

124.2 

125-5 

126.8 

I28.I 

.2 

113.1 

H4.3 

II5-5 

II6.8 

II8.0 

II9-3 

120.6 

121.  8 

123.1 

124.4 

125.7 

127.0 

•4 

112.  1 

II3-3 

II4-5 

II5.8 

II7.0 

118.3 

119.5 

120.8 

122.  1 

123.3 

124.6 

125.9 

.6 

III.  I 

112.3 

H3.5 

II4.8 

116.0 

II7-3 

118.5 

119.8 

121.  0 

122.3 

123.5 

124.8 

.8 

1  10.  2 

III.4 

II2.6 

II3.8 

II5-I 

116.3 

117.5 

118.8 

I2O.O 

I2I.3 

122.5 

123.8 

24.0 

109.3 

110.5 

111.7 

II2.9 

II4.I 

II5-3 

116.5 

117.8 

II9.O 

I2O.2 

121.5 

122.7 

.2 

108.4 

109.5 

110.7 

III.9 

H3.I 

114.4 

115.6 

116.8 

IlS.O 

II9.2 

120.5 

121.7 

•4 

107.5 

108.6 

109.8 

III.O 

112.  2 

H3.4 

114.6 

115.9 

II7.I 

II8.3 

II9-5 

120.7 

.6 

106.6 

107.8 

108.9 

1  10.  1 

111.3 

112.5 

113.7 

114.9 

116.1 

H7.3 

118.5 

119.7 

.8 

105.8 

106.9 

108.1 

109.2 

II0.4 

in.  6 

II2.8 

114.0 

115.2 

II6.4 

117.6 

118.8 

25.0 

104.9 

106.0 

107.2 

108.3 

109.5 

110.7 

111.9 

113.1 

114.2 

II5-4 

116.6 

117.8 

.2 

IO4.  1 

105.2 

106.3 

107.5 

108.7 

109.8 

III.O 

112.  2 

H3.3 

H4.5 

H5.7 

116.9 

•4 

103.3 

104.4 

105.5 

106.6 

107.8 

109.0 

1  10.  1 

111.3 

112.4 

II3.6 

114.8 

116.0 

.6 

102.5 

103.6 

104.7 

105.8 

107.0 

108.1 

109.3 

II0.4 

in.  6 

112.7 

U3.9 

115-1 

.8 

IOI.7 

102.8 

103.9 

105.0 

106.1 

107.3 

108.4 

109.6 

110.7 

111.9 

113.0 

114.2 

26.0 

100-9 

102.0 

103.1 

104.2 

105.3 

106.4 

107.6 

108.7 

109.9 

III.O 

II2.I 

II3-3 

.2 

100.  1 

IOI.2 

102.3 

103.4 

104.5 

105.6 

106.8 

107.9 

109.0 

1  10.  1 

III.3 

112.4 

•4 

99-4 

IOO.4 

101.5 

IO2.6 

103.7 

104.8 

106.0 

I07.I 

108.2 

109.3 

IIO.4 

in.  6 

.6 

98.6 

99-7 

100.7 

101.8 

102.9 

104.0 

105.2 

106.3 

107.4 

108.5 

109.6 

110.7 

.8 

97-9 

98.9 

IOO.O 

IOI.I 

IO2.2 

103.3 

104.4 

105.5 

106.6 

107.7 

108.8 

109.9 

27.0 

97.1 

98.2 

99.2 

100.3 

IOI.4 

102.5 

103.6 

104.7 

105.8 

106.9 

108.0 

109.1 

.2 

96.4 

97.5 

98.5 

99.6 

100.7 

101.8 

102.8 

103.9 

105.0 

106.1 

107.2 

108.3 

•4 

95-7 

96.8 

97-8 

98.9 

99-9 

IOI.O 

102.  1 

103.2 

104.2 

105.3 

106.4 

107.5 

.6 

95-0 

96.1 

97.1. 

98.1 

99-2 

100.3 

101.3 

102.4 

103.5 

104.6 

105.6 

106.7 

.8 

94-3 

95.4 

96.4 

97.4 

98.5 

99.6 

100.6 

IOI.7 

102.7 

103.8 

104.9 

105.9 

28.0 

93-7 

94-7 

95-7 

96.7 

97.8 

98.8 

99-9 

IOI.O 

IO2.O 

103.1 

I04.I 

105.2 

.2 

93-o 

94.0 

95-0 

96.1 

97.1 

98.1 

99.2 

100.2 

IOI.3 

102.3 

103.4 

104.4 

•4 

92.4 

93-4 

94-4 

95.4 

96.4 

97.5 

98.5 

99.5 

100.6 

101.6 

102.7 

103.7 

.6 

91.7 

92.7 

93.7 

94-7 

95.7 

96.8 

97-8 

98.8 

99-9 

100.9 

IOI.9 

103.0 

.8 

91.1 

92.1 

93-1 

94.1 

95-1 

96.1 

97.1 

98.2 

99-2 

100.2 

IOI.2 

102.3 

29.0 

90.4 

91.4 

92.4 

93-4 

94-4 

95.4 

96.5 

97-5 

98.5 

99.5 

100.5 

101.6 

.2 

89.8 

90.8 

91.8 

92.8 

93.8 

94-8 

95-8 

96.8 

97.8 

98.8 

99-9 

100.9 

•4 

89.2 

90.2 

91.1 

92.1 

93-1 

94.1 

95-1 

96.1 

97-1 

98.2 

100.2 

.6 

88.6 

89.6 

90.5 

91-5 

92.5 

93-5 

94-5 

95-5 

96.5 

97.5 

98.5 

99-5 

.8 

88.0 

89.0 

89.9 

90.9 

91.9 

92.9 

93-9 

94.9 

95-8 

96.8 

97.8 

98.8 

30.0 

87.4 

88.4 

89.3 

90.3 

9i.3 

92.3 

93-2 

94.2 

95-2 

96.2 

97-2 

98.2 

.2 

86.8 

87.8 

88.7 

89.7 

90.7 

91.7 

92.6 

93-6 

94.6 

95.6 

96-5 

97-5 

•4 

86.3 

87.2 

88.2 

89.1 

91.1 

92.0 

93-0 

94-0 

94.9 

95-9 

96.9 

.6 

85.7 

86.7 

87.6 

88.5 

89.5 

91.4 

92.4 

93-3 

94.3 

95-3 

96.2 

.8 

85.2 

86.1 

87.0 

88.0 

88.9 

§9.9 

90.8 

91.8 

92.7 

93.7 

94.7 

95-6 

SMITHSONIAN  TABLES. 


116 


TABLE  31. 

DIFFERENCE   OF    HEIGHT    CORRESPONDING   TO  A   CHANGE    OF 
1    MILLIMETRE    IN    THE    BAROMETER. 

METRIC    MEASURES. 


MEAN  TEMPERATURE  OF  THE  AIR  IN  CENTIGRADE  DEGREES. 

Barometric 

Pressure. 

-2° 

0° 

2° 

4° 

6° 

8° 

10° 

12° 

14° 

16° 

mm. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

760 

10.48 

10-57 

10.65 

10.73 

I0.8I 

10.89 

10.98 

II.  06 

H.I5 

11.23 

750 

10.62 

10.71 

10.79 

10.87 

10.95 

11.04 

11.13 

II.  21 

11.30 

11.38 

740 

10.77 

10.85 

10.93 

11.02 

II.  10 

11.19 

11.28 

11.36 

11-45 

H.54 

730 

10.91 

11.00 

II.08 

11.17 

11.26 

11-35 

n-43 

H.52 

ii.  61 

II.7O 

720 

II.  06 

11.15 

11.24 

11.32 

11.42 

11.51 

H.59 

11.68 

11.77 

11.86 

710 

11.22 

11.31 

II.4O 

11.48 

11.58 

11.67 

11-75 

11.85 

11.94 

12.03 

700 

11.38 

11.47 

11.56 

11.65 

11.74 

11.83 

11.92 

12.  02 

12.  II 

12.20 

690 

11-55 

11.63 

11.72 

11.82 

Il.gi 

12.  OO 

12.09 

12.19 

12.28 

12.38 

680 

11.72 

11.80 

11.89 

11.99 

12.08 

12.18 

12.27 

12.37 

12.46 

12.56 

670 

11.89 

11.98 

12.07 

12.17 

12.26 

12.36 

12.46 

12.55 

12.65 

12-75 

660 

I2.O7 

12.  l6 

12.26 

12.35 

12.45 

12.55 

12.65 

12.74 

12.84 

12.94 

650 

12.26 

12.35 

12.45 

12.54 

12.64 

12.74 

12.84 

12.94 

13.04 

I3.I4 

640 

12.45 

12.55 

12.64 

12.74 

12.84 

12.94 

13.04 

13.14 

13.24 

I3.35 

630 

12.65 

12.75 

12.84 

12.94 

13.04 

13.15 

13.25 

13.35 

13.45 

13.56 

620 

12.85 

12.96 

13-05 

I3.I5 

13.25 

13.36 

13.46 

13-57 

13.67 

13.78 

610 

13.06 

13.17 

13.27 

13-37 

13.47 

13.58 

13.68 

13.79 

13.89 

14.01 

600 

13.28 

13.39 

13-49 

13.59 

13.70 

13.80 

13-91 

14.02 

14.13 

14.24 

590 

13.51 

13.62 

13.72 

13.82 

13.93 

14.03 

14-15 

14.26 

14.37 

1448 

580 

13.74 

13.85 

13.96 

14.06 

14.17 

14.28 

14.39 

14.51 

14.62 

14-73 

570 

13.98 

14.09 

14.20 

14.31 

14.42 

14-53 

14.64 

14.76 

14.88 

14.99 

56o 

14.23 

14.34 

14-45 

14-57 

14.68 

14.79 

14.90 

15.02 

15.14 

15.25 

MEAN  TEMPERATURE  OF  THE  AIR  IN   CENTIGRADE  DEGREES. 

Barometric 

Pressure. 

18° 

20° 

22° 

24° 

26° 

28° 

30° 

32° 

34° 

36° 

mm. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

760 

11.32 

11.41 

11.49 

11.58 

11.66 

H.75 

11.84 

11.92 

12.01 

12.10 

750 

11.47 

11.56 

11.64 

H.73 

11.82 

11.91 

12.  OO 

12.08 

12.17 

12.26 

740 

11.63 

11.72 

II.80 

11.89 

11.98 

12.07 

12.  l6 

12.24 

12-33 

12.42 

730 

11.79 

11.88 

11.96 

12.05 

12.15 

12.23 

12.32 

12.41 

12.50 

12.59 

720 

11-95 

12.04 

12.13 

12.22 

12.32 

12.40 

12.49 

12.58 

12.68 

12.77 

710 

12.12 

12.21 

12.30 

12.39 

12.49 

12.58 

12.67 

12.76 

12.86 

12.95 

700 

12.29 

12.39 

12.48 

12-57 

12.67 

12.76 

12.85 

12.94 

13.04 

13.13 

690 

12.47 

12.57 

12.66 

12-75 

12.85 

12.94 

13.04 

13.13 

13-23 

I3.32 

680 

12.66 

12-75 

12.85 

12.94 

13.04 

13.13 

13.23 

13.32 

13-42 

I3.52 

670 

12.85 

12.94 

13.04 

13-  J4 

I3.23 

I3-33 

13.43 

13-52 

13.62 

13.72 

660 

13.04 

13-  J4 

13.24 

13.34 

13.43 

13-53 

I3.63 

13.73 

13.83 

13.93 

650 

13.24 

13.34 

13-44 

13.54 

13.64 

13.74 

13.84 

13-94 

14.04 

14.15 

640 

13-45 

13-55 

13.65 

13.75 

13.85 

13.96 

14.06 

14.15 

14.26 

14.37 

630 

13-66 

13.76 

13-87 

13.97 

14.07 

14.18 

14.28 

14.38 

14.49 

14.60 

620 

13.88 

13.98 

14.09 

14.20 

14.30 

14.41 

I4.5I 

14.62 

14.72 

14.83 

610 

14.11 

14.21 

14.32 

1443 

14.54 

14.64 

14.75 

14.86 

14.96 

I5.07 

600 

14.35 

14-45 

14.56 

14.67 

14.78 

14.89 

15.00 

15." 

15-21 

15.32 

590 

M-59 

14.70 

14.81 

14.92 

15.03 

15-14 

15.25 

15.36 

15-47 

15-59 

580 

14.84 

14-95 

15.07 

I5.I7 

15.29 

15.40 

15.52 

15.63 

15-74 

15.86 

570 

15.10 

15-21 

15.33 

15-44 

15.56 

15-67 

15.79 

I5-91 

16.02 

I6.I4 

560 

15-37 

15.48 

15.60 

15-72 

15.84 

15-95 

l6.07 

16.19 

16.30 

16.42 

SMITHSONIAN  TABLES. 


117 


TABLE  32. 

DETERMINATION    OF    HEIGHTS    BY   THE    BAROMETER. 
Formula    of    Babinet. 


C  (in  feet)  =52494  [i  +  *0+  ^  641  —English  Measures. 


C  (in  metres)  =  16000   |i  -f  lLsi-1  1  —Metric  Measures. 

L  1000     J 

In  which   Z  =  Difference  of  height  of  two  stations  in  feet  or  metres. 

JBoy  B  =  Barometric   readings    at   the   lower   and   upper    stations    respectively, 

corrected  for  all  sources  of  instrumental  error. 
t0,  t  =  Air  temperatures  at  the  lower  and  upper  stations  respectively. 


Values    of   C. 


ENGLISH     MEASURES. 


#(to  +  t). 

log  C. 

C. 

F. 

Feet. 

10° 

4.69834 

49928 

15  , 

•70339 

505H 

20 

.70837 

51094 

25 

•71330 

51677 

30 

.71818 

52261 

35 

4.72300 

52844 

40 

.72777 

53428 

45 

.73248 

540II 

50 

.73715 

54595 

55 

.74177 

55178 

60 

4.74633 

5576i 

65 

•75085 

56344 

70 

.75532 

56927 

75  ; 

•75975 

575H 

80 

.76413 

58094 

85 

4.76847 

58677 

90 

.77276 

59260 

95 

.77702 

59844 

100 

.78123 

60427 

METRIC    MEASURES. 


#(to  +  *)- 

log  C. 

C. 

C. 

-10° 

4.18639 

Metres. 
15360 

-8 

.19000 

15488 

-6 

.19357 

15616 

-4 

.19712 

15744 

—  2 

.20063 

I5872 

0 

4.20412 

16000 

+  2 

.20758 

16128 

4 

.21101 

16256 

6 

.21442 

16384 

8 

.21780 

16512 

10 

4.22II5 

16640 

12 

.22448 

16768 

14 

.22778 

16896 

16 

.23106 

17024 

18 

.23431 

17152 

20 

4.23754 

17280 

22 

.24075 

17408 

24 

.24393 

17536 

26 

.24709 

17664 

28 

.25022 

17792 

30 

4-25334 

17920 

32 

.25643 

18048 

34 

.25950 

18176 

36 

•26255 

18304 

SMITHSONIAN  TABLES. 


118 


TABLE  33. 

BAROMETRIC   PRESSURES  CORRESPONDING  TO  THE  TEMPERATURE 
OF  THE    BOILING    POINT   OF   WATER. 

ENGLISH    MEASURES. 


Tempera- 
ture. 

0?0 

0?l 

0?2 

0?3 

0?4 

0?5 

0?6 

0?7 

0?8 

0?9 

F. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

185° 

17.05 

17.08 

17.12 

17.16 

17.20 

17.23 

17.27 

I7.3I 

17.35 

J7.39 

186 

17.42 

17.46 

17.50 

17-54 

17.58 

17.61 

I7.65 

I7.69 

17.73 

17.77 

187 

17.81 

17.84 

17.88 

17.92 

17.96 

18.00 

18.04 

18.08 

18.12 

18.16 

188 

18.20 

18.24 

18.27 

18.31 

18.35 

18.39 

18.43 

18.47 

18.51 

18.55 

189 

18.59 

18.63 

18.67 

18.71  . 

18.75 

18.79 

18.83 

18.87 

18.91 

18.95 

190 

19.00 

19.04 

19.08 

19.12 

19.16 

19.20 

19.24 

19.28 

19.32 

19.36 

191 

19.41 

19.45 

1949 

19-53 

19.57 

19.61 

19.66 

19.70 

19.74 

19.78 

192 

19.82 

19.87 

19.91 

*9-95 

19.99 

20.04 

20.08 

20.  1  2 

20.17 

20.21 

193 

20.25 

20.29 

20.34 

20.38 

20.42 

20.47 

20.51 

20.55 

2O.6o 

20.64 

194 

20.68 

20.73 

20.77 

20.82 

20.86 

20.90 

20.95 

20.99 

21.04 

2  1.  08 

195 

21.13 

21.17 

21.22 

21.26 

21.30 

21-35 

21.39 

21.44 

21.48 

21-53 

196 

21.58 

21.62 

21.67 

21.71 

21.76 

21.  80 

21-85 

21.89 

21.94 

21.99 

197 

22.03 

22.o8 

22.12 

22.17 

22.22 

22.26 

22.31 

22.36 

22.40 

22.45 

198 

22.50 

22.54 

22.59 

22.64 

22.69 

22.73 

22.78 

22.83 

22.88 

22.92 

199 

22.97 

23.02 

23.07 

23.11 

23.16 

23.21 

23.26 

23.31 

23.36 

23.40 

200 

23-45 

23.50 

23-55 

23.60 

23.65 

23.70 

23.75 

23.80 

23.85 

23.89 

201 

23-94 

23.99 

24.04 

24.09 

24.14 

24.19 

24.24 

24.29 

24.34 

24-39 

202 

24.44 

24.49 

24.54 

24.59 

24.64 

24.69 

24.74 

24.80 

24.85 

24.90 

203 

24-95 

25.00 

25.05 

25.10 

25.15 

25.21 

25.26 

25.31 

25.36 

25.41 

2O4 

25.46 

25.52 

25-57 

25.62 

25.67 

25-73 

25.78 

25.83 

25.88 

25.94 

205 

25-99 

26.04 

26.10 

26.15 

26.20 

26.25 

26.31 

26.36 

26.42 

26.47 

206 

26.52 

26.58 

26.63 

26.68 

26.74 

26.79 

26.85 

26.90 

26.96 

27.01 

207 

27.07 

27.12 

27.18 

27-23 

27.29 

27.34 

27.40 

27-45 

27.51 

27.56 

208 

27.62 

27.67 

27.73 

27.79 

27.84 

27.90 

27-95 

28.01 

28.07 

28.12 

209 

28.18 

28.24 

28.29 

28.35 

28.41 

28.46 

28.52 

28.58 

28.64 

28.69 

210 

28.75 

28.81 

28.87 

28.92 

28.98 

29.04 

29.10 

29.16 

29.21 

29.27 

211 

29.33 

29-39 

29-45 

29.51 

29-57 

29.62 

29.68 

29.74 

29.80 

29.86 

212 

29.92 

29.98 

30.04 

30.10 

30.16 

30.22 

30.28 

30.34 

30.40 

30.46 

METRIC    MEASURES. 


TABLE  34. 


Tempera- 
ture. 

0?0 

0?l 

0?2 

0?3 

0?4 

0?5 

0?6 

0?7 

0?8 

0?9 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

80° 

354.6 

356.1 

357-5 

359.0 

360.4 

361.9 

363.3 

364-8 

366.3 

367.8 

81 

369.3 

370.8 

372.3 

373-8 

375-3 

376.8 

378.3 

379-8 

381.3 

382.9 

82 

384-4 

385.9 

387.5 

389.0 

390.6 

392.2 

393-7 

395-3 

396.9 

398.5 

83 

4OO.I 

401.7 

403.3 

404-9 

406.5 

408.1 

409.7 

4".3 

413.0 

414-6 

84 

416.3 

417.9 

419.6 

421.2 

422.9 

424.6 

426.2 

427.9 

429.6 

431.3 

85 

433-0 

434-7 

436.4 

438.1 

439-9 

441.6 

443-3 

445-1 

446.8 

448.6 

86 

450.3 

452.1 

453-8 

455-6 

457-4 

459.2 

461.0 

462.8 

464.6 

466.4 

87 

468.2 

470.0 

471.8 

473-7 

475-5 

477-3 

479-2 

481.0 

482.9 

484.8 

88 

486.6 

488.5 

490.4 

492.3 

494-2 

496-1 

498.0 

499.9 

,501.8 

503.8 

89 

505-7 

507-6 

509.6 

5H.5 

513.5 

515.5 

517.4 

5I9.4 

521.4 

523.4 

90 

5254 

527.4 

5294 

53L4 

533-4 

535-5 

537-5 

539-6 

541.6 

543-7 

91 

545-7 

547.8 

549-9 

551-9 

554-0 

556.1 

558.2 

560.3 

562.4 

564-6 

92 

566.7 

568.8 

57i'Q 

573.1 

575-3 

577-4 

579-6 

581.8 

584.0 

586.1 

93 

588.3 

590.5 

592.7 

595-0 

597-2 

599-4 

601.6 

603.9 

606.  1 

608.4 

94 

610.7 

612.9 

615.2 

617-5 

619.8 

622.1 

624.4 

626.7 

629.0 

631.4 

95 

96 

633.7 
657.4 

636.0 
659-9 

638.4 
662.3 

640.7 
664.7 

643.1 
667.1 

645.5 
669.6 

647.9 
672.0 

650.2 
674.5 

652.6 
677.0 

655-0 
679.4 

97 

681.9 

684.4 

686.9 

689.4 

691.9 

694.5 

697.0 

699.5 

702.1 

704.6 

98 

707.2 

709.7 

712.3 

714.9 

717.5 

720.1 

722.7 

725.3 

727.9 

730.5 

99 

733-2 

735-8 

738.5 

741.2 

743-8 

746.5 

749-2 

751-9 

754-6 

757-3 

100 

760.0 

762.7 

765.5 

768.2 

770.9 

773-7 

776.5 

779-2 

782.0 

784.8 

SMITHSONIAN  TABLES. 


119 


HYGROMETRICAI,  TABLES. 


Pressure  of  aqueous  vapor  \Brocti)  — 

English  measures   ..............     TABI,E  35 

f  36 
Metric  measures     ....     ......    ....  <  ^ 

I  43 

Pressure  of  aqueous  vapor  at  low  temperatures  (C.  F.  Marvin)  — 

English  and  Metric  measures      ......   ,.     .     TABI,E  37 

Weight  of  aqueous  vapor  in  a  cubic  foot  of  saturated  air  — 

English  measures      .     .     .     .     .....     .   :.     .     TABI<E  38 

Weight  of  aqueous  vapor  in  a  cubic  metre  of  saturated  air  — 

Metric  measures  .............     TABI,E  39 

Reduction  of  psychrometric  observations  —  English  measures. 

Pressure  of  aqueous  vapor  ...........     TABI,E  40 

Values  of  0.000367^(^—^)^1  -\  --  lj       .....  41 

Relative  humidity  —  Temperature  Fahrenheit   ......     TABI.E  42 

Reduction  of  psychrometric  observations  —  Metric  measures. 

Pressure  of  aqueous  vapor  ...........     TABI,E  43 


Values  of  0.000660  B(t  —  t^-L  +     —  .....  44 

\          873  / 

Relative  humidity  —  Temperature  Centigrade   ......     TABI^E  45 

Reduction  of  snowfall  measurements. 

Depth   of   water   corresponding  to  the  weight  of   snow 

(or  rain)  collected  in  an  8-inch  gage  .     .     .     .    '.     .     TABI<£  46 

Rate  of  decrease  of  vapor  pressure  with  altitude      ....    TABI,E  .47 


121 


TABLE  35. 


PRESSURE    OF   AQUEOUS   VAPOR. 

(Broch.} 
ENGLISH    MEASURES. 


Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 
0?l 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

on 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 
0?l 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 
0?l 

F. 

Inch. 

F. 

Inch. 

F. 

Inch. 

F. 

Inch. 

-20?0 

0.0167 

-I0?0 

0.0277 

0?0 

0.0449 

I0?0 

0.0710 

-19.8 

0.0168 

i 
i 

-9.8 

0.0280 

l 

+  0.2 
0.4 

•0454 
.0458 

2 

10.2 
10.4 

.0716 
.0723 

3 
3 

19.6 

.0170 

I 

9.6 

.0283 

0.6 

.0462 

2 

10.6 

.0729 

3 

19.4 

.0172 

I 

9-4 

.0286 

0.8 

.0467 

2 

10.8 

.0736 

3 

19.2 

.0174 

9.2 

.0289 

2 

3 

19.0 

.0176 

9.0 

.0292 

1.0 

0.0471 

2 

M.O 

0.0742 

I 

1.2 

.0475 

II.  2 

.0749 

-18.8 

18.6 

0.0177 
.0179 

I 

-8.8 

S.6 

0.0294 
.0297 

1.4 

1.6 

.0480 
.0484 

2 
2 

11.4 
n.6 

.0756 
.0762 

3 
3 

18.4 

.Ol8l 

8.4 

.0300 

1.8 

.0489 

2 

ii.  8 

.0769 

3 

18.2 

.0183 

8.2 

.0303 

2 

3 

18.0 

.0185 

I 

8.0 

.0306 

2 

2.0 

0.0493 

12.0 

0.0776 

i 

2 

2.2 

.0408 

12.2 

.0783 

-17.8 

17.6 

0.0187 
.0189 

i 

I 

-7.8 

7-6 

0.0309 
.0312 

2 
2 

2.4 
2.6 

.0503 
.0507 

2 
2 

12.4 
12.6 

.0790 
.0797 

3 
3 

17.4 

.0191 

I 

7-4 

.0315 

2 

2.8 

.0512 

2 

12.8 

.0804 

17.2 

.0193 

7.2 

.0318 

2 

4 

17.0 

•0195 

7.0 

.0322 

3.0 

0.0517 

13.0 

O.oSlI 

I 

2 

3-2 

.0522 

13.2 

.O8l8 

-16.8 

16.6 

0.0197 
.0199 

i 

i 

-6.8 

6.6 

0.0325 
.0328 

2 
2 

31 
3.6 

.0526 
.0531 

2 
2 

<H 

13.6 

.0825 
.0832 

4 
4 

16.4 

.O2OI 

I 

6.4 

.0331 

2 

3-8 

.0536 

2 

13.8 

.0840 

4 

16.2 

.0203 

6.2 

•0334 

2 

4 

16.0 

.0205 

i 

6.0 

.0338 

2 

4.0 

0.0541 

14.0 

0.0847 

i 

2 

4.2 

.0546 

3 

14.2 

•0854 

4 

-15.8 

0.0207 

i 

-5.8 

0.0341 

2 

4-4 

.0551 

3 

14.4 

.0862 

4 

15.6 

.0209 

I 

5-6 

•0344 

2 

4.6 

.0556 

3 

14.6 

.0869 

4 

15-4 

.O2II 

i 

5-4 

.0347 

2 

4.8 

.0561 

3 

14.8 

.0877 

4 

15.2 

.0213 

5.2 

.0351 

3 

4 

15.0 

.O2l6 

i 

5-0 

•0354 

2 

5.0 

0.0567 

15.0 

0.0885 

-14.8 

0.0218 

I 

i 

-4.8 

0.0358 

2 
2 

5-2 
5-4 

.0572 
.0577 

3 

15-2 

15.4 

.0892 
.0900 

4 

14.6 

.0220 

i 

4.6 

.0361 

2 

5-6 

.0582 

3 

15.6 

.0908 

4 

14.4 

.O222 

I 

4.4 

•0365 

2 

5.8 

.0588 

3 

15-8 

.0916 

4 

14.2 

.0225 

4.2 

.0368 

3 

4 

14.0 

.O227 

4.0 

.0372 

6.0 

0.0593 

16.0 

0.0924 

i 

2 

6.2 

.0598 

16.2 

.0932 

-13.8 

0.0229 

i 

-3.8 

0.0375 

2 

6-4 

.0604 

3 

16.4 

.0940 

4 

13-6 

.0232 

i 

3-6 

•0379 

2 

6.6 

.0609 

3 

16.6 

.0948 

4 

13-4 

.0234 

I 

3-4 

•0383 

2 

6.8 

.0615 

3 

16.8 

.0956 

13.2 

.0236 

3.2 

.0386 

3 

4 

13.0 

.0239 

3-0 

.0390 

7.0 

0.0620 

17.0 

0.0965 

-12.8 

12.6 

12.4 

12.2 

0.0241 
.0244 
.0246 
.0249 

I 
i 
i 
i 
i 

-2.8 

2.6 

2.4 

2.2 

0.0394 

•0397 
.0401 
.0405 

2 
2 
2 
2 
2 

7.2 
7-4 
7.6 
7-8 

.0626 
.0632 
.0637 
.0643 

3 
3 
3 
3 

17.2 
17.4 
17.6 
17.8 

.0973 
.0981 
.0990 
.0999 

4 
4 
4 
4 

12.0 

.0251 

2.0 

.0409 

8.0 

0.0649 

18.0 

O.IOO7 

-11.8 

ii.  6 
11.4 

II.  2 

0.0254 
.0256 
.0259 
.0261 

i 
i 

i 
I 

-1.8 

1.6 

1.4 

1.2 

0.0413 
.0417 
.0421 
.0425 

2 
2 
2 
2 

8.2 

8.4 
8.6 
8.8 

•0655 
.0661 
.0667 
.0673 

3 
3 
3 
3 

18.2 
18.4 
18.6 
18.8 

.1016 
.1024 

•1033 
.1042 

4 
4 
4 
4 

II.  0 

.0264 

i 

i 

I.O 

.0429 

2 
2 

9.0 

0.0679 

3 

19.0 

O.I05I 

4 

-10.8 

O.O267 

-0.8 

0.0433 

9.2 

.0685 

3 

19.2 

.1060 

10.6 

.0269 

0.6 

.0437 

9-4 

.0691 

3 

19.4 

.1069 

10.4 

.0272 

0.4 

.0441 

9-6 

.0697 

3 

19.6 

.1078 

10.2 

.0275 

I 

0.2 

•0445 

2 

9.8 

.0704 

3 

19.8 

.1087 

5 

SMITHSONIAN  TABLES. 


122 


TABLE   35. 


PRESSURE    OF   AQUEOUS   VAPOR. 
(Brock.} 

ENGLISH    MEASURES. 


Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

F. 

Inch. 

F. 

Inch. 

F. 

Inch. 

F. 

Inch. 

20?0 

o.  1097 

30?0 

o.  1660 

40?0 

0.2465 

50?0 

0.3598 

T  *? 

2O.2 

.IIO6 

5 

30.2 

.1673 

7 

40.2 

.2484 

IO 

50.2 

.3625 

I3 

T  -2 

2O.4 

.1115 

5 

3°4 

.1687 

7 

40.4 

.2503 

IO 

504 

.3652 

I3 

20.6 
20.8 

.1125 
•II34 

5 
5 

30.6 
30.8 

.1700 
.1714 

7 

40.6 
40.8 

.2523 
.2542 

IO 
10 

50.6 
50.8 

.3679 
.3706 

14 

5 

7 

10 

14 

21.0 

O.II44 

31.0 

0.1728 

41.0 

0.2562 

51.0 

0-3734 

T  A 

21.2 

.1154 

5 

31.2 

.1742 

7 

41.2 

.2582 

IO 

51.2 

.3761 

•"•4 

21.4 

.1163 

5 

314 

.1756 

7 

41.4 

.2601 

IO 

TO 

514 

.3789 

ll 

21.6 

.1173 

31.6 

.1770 

7 

41.6 

.2621 

J.O 

51-6 

.3817 

T  A 

21.8 

.1183 

5 

31-8 

.1784 

7 

41.8 

.2642 

IO 

51.8 

.3845 

*4 

5 

7 

IO 

14 

22.0 

O.II93 

32.0 

0.1799 

42.0 

0.2662 

IO 

52.0 

0.3874 

22.2 

.1203 

32.2 

.1813 

7 

42.2 

.2683 

52.2 

.3962 

4 

22.4 

.1213 

5 

324 

.1828 

7 

42.4 

.2703 

524 

•3931 

4 

22.6 

.1223 

5 

32.6 

.1842 

7 

42.6 

.2724 

IO 

52.6 

.3960 

I4 

22.8 

.1234 

5 

32.8 

•1857 

7 

42.8 

•2745 

II 

52.8 

.3989 

I5 

5 

7 

II 

15 

23.0 

0.1244 

33.0 

0.1872 

43.0 

0.2766 

53.0 

0.4018 

23-2 

.1255 

5 

33-2 

.1887 

43-2 

.2787 

1  1 

T  T 

53-2 

.4048 

5 

234 

.1265 

5 

334 

.1902 

434 

.2808 

X  1 

T   T 

534 

.4077 

X5 

23-6 

.1276 

5 

33.6 

.1917 

43-6 

.2830 

1  1 
T  T 

53-6 

.4107 

J5 

23-8 

.1287 

5 

33-8 

•1933 

43.8 

.2851 

X  1 

53-8 

.4137 

I5 

5 

8 

ii 

15 

24.0 

0.1297 

34.0 

0.1948 

44.0 

0.2873 

T  T 

54.0 

0.4168 

24.2 

.1308 

5 

34-2 

.1964 

Q 

44.2 

.2895 

X  X 
II 

54.2 

.4198 

5 

24.4 

.1319 

344 

.1979 

O 
Q 

444 

.2917 

T  T 

544 

.4229 

~ 

24.6 

•1330 

6 

34.6 

•1995 

O 

44-6 

•2939 

54-6 

4259 

ff. 

24.8 

.1341 

D 

6 

34-8 

.2OI  I 

8 

44-8 

.2962 

I  I 

II 

54-8 

.4290 

10 
16 

25.0 

0.1352 

6 

35.0 

o.  2027 

8 

45.0 

0.2984 

II 

55.0 

0.4322 

16 

25-2 

.1364 

6 

35-2 

.2043 

8 

45-2 

.3007 

II 

55-2 

4353 

16 

254 

•1375 

354 

.2059 

454 

.3030 

554 

4385 

rfi 

25-6 

.1386 

35-6 

.2076 

45-6 

.3053 

55-6 

.4417 

xo 

25.8 

.1398 

35-8 

.2092 

45.8 

.3076 

12 

55-8 

4449 

6 

8 

12 

lo 

26.0 

o.  1409 

36.0 

0.2109 

Q 

46.0 

0.3099 

12 

56.0 

0.4481 

16 

26.2 

.1421 

36.2 

.2125 

O 

46.2 

.3123 

T  O 

56.2 

4513 

26.4 

•1433 

364 

.2142 

46.4 

.3146 

\.2. 

564 

.4546 

rfi 

26.6 

•1445 

36.6 

•2159 

46.6 

.3170 

T  O 

56.6 

•4579 

XO 

" 

26.8 

•1457 

36-8 

.2176 

9 

46.8 

.3194 

±2, 

56.8 

.4612 

6 

9 

12 

17 

27.0 

o.  1469 

37.0 

0.2193 

47.0 

0.3218 

TO 

57.0 

0.4645 

27.2 

.1481 

37-2 

.22IO 

47.2 

.3242 

Km 

57-2 

.4679 

• 

27.4 

•1493 

_ 

374 

.2228 

9 

474 

.3267 

12 

574 

.4712 

' 

27.6 

.1505 

37.6 

•2245 

9 

47.6 

.3291 

12 

57-6 

4746 

*7 

27.8 

.1518 

37-8 

.2263 

9 

47.8 

12 

57-8 

.4780 

' 

6 

9 

12 

17 

28.0 

0.1530 

6" 

38.0 

0.2281 

48.0 

0.3341 

58.0 

0.4815 

28.2 

•  1543 

38-2 

.2298 

9 

48.2 

.3366 

I3 

58.2 

.4849 

1/7 

28.4 

.1555 

384 

.2316 

9 

48.4 

•3391 

I3 

58.4 

.4884 

y 
f-Q 

28.6 

.1568 

38.6 

•2334 

9 

48.6 

.3416 

T3 

58.6 

.4919 

XO 

28.8 

.1581 

38.8 

•2353 

9 

48.8 

•3442 

T3 

58.8 

4954 

6 

9 

I  ^ 

18 

29.0 

0.1594 

39.0 

0.2371 

49.0 

0.3467 

59.0 

0.4990 

18 

29.2 

29.4 

.1607 
.1620 

7 

39-2 

394 

.2390 
.2408 

9 

49.2 
494 

•3493 
.3519 

13 

59-2 
594 

•5025 
.5061 

18 

TQ 

29.6 

.1633 

39-6 

.2427 

9 

49.6 

.3546 

J3 

59-6 

.5097 

XO 

18 

29.8 

.1646 

7 

39-8 

.2446 

10 

49.8 

•3572 

13 

59-8 

.5134 

18 

SMITHSONIAN  TABLES. 


123 


TABLE  35. 


PRESSURE    OF   AQUEOUS   VAPOR. 

(Broch.} 
ENGLISH    MEASURES. 


Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

F. 

Inch. 

F. 

Inch. 

F. 

Inches. 

F. 

Inches. 

60?0 

60.2 

0.5170 

.5207 

18 

70?0 

70.2 

0.7320 

•7370 

25 

80?0 

80.2 

1.0219 
.0286 

34 

1  A 

90?0 

90.2 

1.4081 
.4170 

44 

60.4 

.5244 

*9 

704 

.7420 

25 

80.4 

•0354 

34 

O  A 

90.4 

4259 

45 

60.6 
60.8 

.5282 

•53!9 

19 

70.6 
70.8 

.7471 
.7522 

26 

80.6 
80.8 

.0422 
.0490 

34 

34 

90.6 
90.8 

•4349 
4439 

45 
45 

19 

26 

34 

45 

61.0 

61.2 

0.5357 
•5395 

J9 

71.0 

71.2 

0.7573 
.7625 

26 

81.0 

81.2 

1.0558 
.0627 

35 

91.0 

91.2 

1-4530 
.4621 

46 

Aft 

61.4 

•5433 

X9 

71.4 

.7676 

81.4 

.0697 

35 

*J  E 

9*L4 

.4712 

40 
Aft 

61.6 

•5471 

I9 

71.6 

.7728 

*{. 

81.6 

.0767 

35 

*7  C 

91.6 

4805 

4O 
Aft 

61.8 

.55io 

J9 

71.8 

.7781 

20 

81.8 

.0837 

35 

91.8 

4897 

4° 

19 

26 

35 

47 

62.0 

0-5549 

72.0 

0.7834 

82.0 

1.0907 

if\ 

92.0 

1.4990 

A  n 

62.2 

.5588 

20 

72.2 

.7887 

27 

82.2 

.0978 

30 

if~\ 

92.2 

.5084 

47 

1  *7 

62.4 
62.6 
62.8 

.5628 
.5667 
.5707 

20 

20 
20 

724 
72.6 
72.8 

.7940 

•7994 
.8048 

27 
27 
27 

824 
82.6 
82.8 

.1050 
.1121 
.1194 

3° 
36 
36 

924 
92.6 
92.8 

.5178 
•  5273 
.5368 

47 
47 
48 

2O 

27 

36 

48 

63.0 

0.5748 

73.0 

0.8102 

83.0 

I.I266 

0*7 

93.0 

1.5464 

63-2 

.5788 

2O 

73-2 

•8157 

27 

83-2 

•1339 

37 

m 

93-2 

.556o 

8 

634 

.5829 

2O 

734 

.8212 

R 

834 

.1413 

37 

*)*7 

934 

•5657 

AC\ 

63.6 

•5870 

21 

73-6 

.8267 

R 

83.6 

.1487 

37 

*5*7 

93-6 

•5755 

49 

AC\ 

63.8 

.5911 

21 

73-8 

.8323 

2 

83-8 

.1561 

37 

93-8 

.5853 

49 

21 

28 

37 

49 

64.0 

0.5952 

74.0 

0.8379 

84.0 

1.1635 

-Q 

94.0 

I.595I 

AC\ 

64.2 
64.4 
64.6 
64.8 

•5994 
.6036 
.6078 
.6120 

21 
21 
21 
21 

74.2 
744 
74-6 
74.8 

•8435 
.8492 

.8549 
.8606 

28 
29 
29 

84.2 
84.4 
84.6 
84.8 

.1710 
.1786 
.1862 
.1938 

3° 
38 
38 
38 

94-2 
944 
94.6 
94.8 

.6050 
.6149 
.6249 
•6350 

49 
50 
50 
50 

21 

29 

38 

51 

65.0 

0.6163 

75.0 

0.8664 

S 

85.0 

I.20I5 

95.0 

1.6451 

£-  T 

65.2 

.6206 

22 

75-2 

.8722 

29 

85-2 

.2093 

39 

1f\ 

95-2 

•  6552 

D1 

r  T 

654 
65.6 
65.8 

.6249 
•6293 
.6337 

22 
22 
22 

754 
75-6 
75-8 

.8780 
.8839 
.8898 

29 
29 
30 

854 
85.6 
85-8 

.2170 
.2248 
.2327 

39 
39 
39 

954 
95-6 
95-8 

•6655 
.6758 
.6861 

OL 
51 

52 

22 

^O 

39 

52 

66.0 

0.6381 

76.0 

0.8957 

86.0 

1.2406 

96.0 

1.6964 

66.2 
664 
66.6 
66.8 

.6425 
.6470 
.6514 
.6560 

22 
22 
22 
23 

76.2 
764 
76.6 
76.8 

.9017 
.9077 

•  9I37 
.9198 

3° 
30 
30 
30 

86.2 
864 
86.6 
86.8 

.2485 
.2565 
.2645 
.2726 

4° 
40 
40 
40 

96.2 

964 
96.6 
96.8 

.7069 

.7174 
.7279 

.7385 

52 
52 

53 
53 

67.0 

0.6605 

23 

77.0 

0.9259 

3i 

87.0 

1.2807 

A  T 

97.0 

1.7492 

53 

CA 

67.2 

.6651 

23 

77-2 

.9321 

31 

87.2 

.2889 

41 
A  T 

97.2 

•7599 

34 

674 
67.6 
67.8 

.6697 
.6743 
.6789 

23 
23 
23 

774 
77-6 
77-8 

.9383 
•9445 
.9507 

31 
31 

874 
87.6 
87.8 

.2971 
.3054 
.3137 

41 
41 
42 

974 
97.6 

97-8 

.7707 
.7815 
.7924 

54 
54 

23 

•5  T 

42 

55 

68.0 

68.2 
68.4 
68.6 
68.8 

0.6836 
.6883 
.6930 
.6978 
.7026 

24 
24 

24 

24 

78.0 

78.2 

78.4 
78.6 
78.8 

0.9570 

.9633 
.9697 
.9761 
.9825 

32 
32 
32 
32 

88.0 

88.2 
88.4 
88.6 
88.8 

1.3220 
•3304 
.3388 
•3473 
.3558 

42 
42 
42 

43 

98.0 

98.2 
98.4 
98.6 
98.8 

1.8034 
.8144 

.8254 
.8366 
.8477 

55 

55 
56 
56 

69.0 

69.2 

694 
69.6 
69.8 

0.7074 
.7123 
.7172 
.7221 
.7270 

24 
24 
24 
25 
25 
25 

79.0 

79-2 
794 
79.6 

79-8 

0.9890 
•9955 

1.  0021 
.0087 
•0153 

32 

33 
33 
33 
33 
33 

89.0 

89.2 

894 
89.6 
89.8 

1.3644 

•3731 
.3818 

.3905 
•3993 

43 

43 
43 

44 
44 

44 

99.0 

99-2 
994 
99.6 
99.8 

1.8590 
.8703 
.8817 

.8931 
.9046 

56 

57 
57 
57 
57 
58 

SMITHSONIAN  TABLES. 


124 


TABLE  33. 


PRESSURE    OF  AQUEOUS   VAPOR 

(Brock.} 
ENGLISH    MEASURES. 


Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

F. 

Inches. 

F. 

Inches. 

F. 

Inches. 

F. 

Inches. 

I00?0 

1.9161 

„ 

IIO?0 

2.5765 

I20?0 

34253 

nfi 

I30?0 

4.5044 

100.2 

100.4 
100.6 
100.8 

.9277 
•9394 

.9629 

58 
59 
59 

1  10.2 
IIO.4 

no.6 
1  10.8 

•5915 
.6066 
.6217 
.6369 

75 
76 

76 

120.2 
120.4 
I2O.6 
120.8 

•4445 
4637 
.4831 
.5026 

96 
96 

97 
97 

130.2 
130.4 
130.6 
130.8 

.5286 
.5530 

•5775 
.6020 

121 
122 
122 
123 

59 

77 

98 

123 

101.  0 

1.9747 

fin 

III  0 

2.6522 

121.0 

3.5221 

131.0 

4.6267 

IOI.2 

.9867 

DU 

fin 

III.2 

.6676 

77 

I2I.2 

.5417 

90 

131.2 

.6515 

124 

IOI.4 

101.6 
101.8 

.9986 
2.0107 
.0228 

CXJ 

60 
60 

III.4 

in.6 
in.8 

.6831 
.6986 
.7142 

77 
78 
78 

I2I.4 
I2I.6 
I2I.8 

.5615 
.5813 
.6012 

99 
99 

100 

I3M 
131.6 
131.8 

.6764 

.7015 
.7266 

I25 
125 

126 

61 

78 

100 

126 

102.0 

2.0349 

61 

112.0 

2.7299 

*JC\ 

122.0 

3.6213 

132.0 

4.7519 

102.2 

.0471 

fir 

112.  2 

•  7457 

79 

122.2 

.6414 

132.2 

•  7773 

127 

102.4 
102.6 
102.8 

•0594 
.0718 
.0842 

01 
62 
62 

II2.4 
II2.6 
II2.8 

.7616 
•  7775 
•7935 

79 
80 
80 

122.4 
122.6 
122.8 

.6616 
.6819 
.7023 

IOI 
IO2 
102 

1324 
132.6 
132.8 

.8028 
.8284 
.8541 

127 
128 
129 

62 

80 

102 

129 

103.0 

2.0967 

113.0 

2.8096 

RT 

123.0 

3.7228 

'Tf-\') 

133.0 

4.8800 

-7 

103.2 
103.4 
103.6 
103.8 

.1092 
.1218 
•1345 
•1473 

63 
63 
64 

113.2 

H34 
113.6 
113.8 

.8257 
.8420 
.8583 
.8747 

01 
8! 

82 
82 

123.2 
123.4 
123.6 
123.8 

•7434 
.7641 

.7849 
.8058 

IO3 
I03 
104 
104 

133-2 
1334 
133.6 
133.8 

•9°59 
.9320 
.9582 
.9845 

130 
130 

132 

64 

82 

105 

132 

104.0 

2.1601 

fi/i 

114.0 

2.8912 

124.0 

3.8267 

134.0 

5.0110 

104.2 
104.4 
104.6 
104.8 

.1730 

.1859 
.1989 

.2120 

°4 
65 
65 
65 

114.2 

114.4 
114.6 
114.8 

.9078 
.9244 
.9412 
.9580 

83 
84 

84 

124.2 
124.4 
124.6 
124.8 

.8478 
.8690 
.8903 
.9117 

IO5 
106 
106 
107 

134.2 

1344 
134.6 
134.8 

.0375 
.0642 
.0910 
.1179 

133 
134 
135 

66 

85 

107 

135 

105.0 

105.2 
105.4 

2.2251 

.2384 

.2516 

66 
66 

fi7 

115.0 

115-2 

2.9749 
.9919 
3.0089 

85 
85 

Qfi 

125.0 

125.2 
125.4 

3.9332 
.9548 
.9765 

108 
109 

135.0 

135.2 
1354 

5.1450 
.1722 
.1994 

136 
136 

105.6 

.2650 

D/ 
67 

115.6 

.0261 

OD 
Qfi 

125.6 

.9983 

109 

135.6 

.2269 

137 

105.8 

.2784 

°/ 

115-8 

•0433 

oo 

125.8 

4.0202 

I  IO 

135.8 

•  2544 

J3° 

67 

87 

no 

138 

106.0 

106.2 

2.2919 

.3054 

68 
68 

116.0 

116.2 

3.0606 
.0780 

87 

126.0 

126.2 

4.0422 
.0643 

in 

T  T  T 

136.0 

136.2 

5.2820 
.3098 

139 

106.4 

.3190 

uo 

68 

116.4 

•0955 

88 

126.4 

.0865 

1  J.  J. 

136.4 

•3377 

I39 

106.6 
106.8 

.3327 
.3465 

69 

116.6 
116.8 

.1131 
.1308 

OO 

88 

126.6 
126.8 

.1088 
.1312 

112 

136.6 
136.8 

.3657 
•3939 

141 

69 

89 

113 

141 

107.0 

2.3603 

*7f*\ 

117.0 

3-1485 

Sn 

127.0 

4.1537 

137.0 

54221 

107.2 
107.4 
107.6 

.3742 
.  .3882 

.4023 

7° 
70 
70 

117.2 
117.4 
117.6 

.1663 
.1842 
.2023 

09 
90 
90 

127.2 
127.4 
127.6 

.1764 
.1991 
.2219 

114 
114 

137.2 

1374 
137.6 

4505 
•4791 
.5077 

142 
143 
M3 

107.8 

.4164 

71 

117.8 

.2204 

91 

127.8 

.2448 

IZ5 

137.8 

.5365 

144 

71 

91 

115 

145 

108.0 

2.4306 

118.0 

3.2386 

128.0 

4.2679 

TT/r 

138.0 

5.5654 

108.2 
108.4 
108.6 
108.8 

4449 
4592 
4736 
.4881 

72 

72 
72 

118.2 
118.4 
118.6 
118.8 

.2568 
.2752 

•  2937 
.3122 

91 
92 

92 
93 

128.2 
128.4 
128.6 
128.8 

.2910 
.3143 
•3377 
.3612 

IID 

116 
117 
117 

138.2 
138.4 
138.6 
138.8 

•5945 
.6237 
•6530 
.6824 

145 
146 

147 
147 

73 

93 

118 

148 

109.0 

2.5026 

71 

119.0 

3-3308 

129.0 

4.3848 

139.0 

5.7120 

T  Af\ 

109.2 
109.4 
109.6 
109.8 

•5172 
.5319 
.5467 
.5616 

16 

73 
74 
74 
75 

119.2 
119.4 
119.6 
119.8 

•3495 
.3683 
.3872 
.4062 

94 
95 
95 
95 

129.2 
129.4 
129.6 
129.8 

4085 
4323 
4562 
.4802 

119 
119 

120 
120 
121 

139.2 
139-4 
139.6 
139-8 

.7417 
.7715 
.8014 

•8315 

149 

149 
150 
150 

SMITHSONIAN  TABLES. 


125 


TABLE  35. 


PRESSURE    OF   AQUEOUS    VAPOR. 
(Brock.} 

ENGLISH    MEASURES. 


Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

F. 

Inches. 

F. 

Inches. 

F. 

Inches. 

F. 

Inches. 

I40?0 

140.2 
140.4 
140.6 
140.8 

5.8617 
.8921 
.9226 
•9532 
•9839 

152 
152 

153 

154 

I50?0 

150.2 
150.4 
150.6 
150.8 

7.5521 
.5897 
•6275 
•6654 
•7035 

188 
189 
190 
191 

I60?0 

160.2 
160.4 
160.6 
160.8 

9-6374 
.6836 
.7300 
.7765 
•8233 

231 
232 

233 

234 

I70?0 

170.2 
170.4 
170.6 
170.8 

12.1870 
.2432 
.2997 
.3564 
•4133 

281 
282 
283 
285 

I  ^  A. 

191 

235 

286 

141.0 

141.2 
141.4 
141.6 

6.0148 
.0458 
.0770 
.1083 

155 
156 
157 

151.0 

151.2 

151.6 

7.7418 
.7802 
.8188 
•8575 

192 

193 
194 

161.0 

161.2 
161.4 
161.6 

9.8702 
•9173 
•9647 
IO.OI22 

236 
237 
238 

171.0 

171.2 

171.4 
171.6 

12.4704 
.5278 

-    .5853 
.6431 

287 
288 
289 

141.8 

•1397 

I57 

151.8 

.8964 

r95 

161.8 

•°599 

239 

171.8 

.7011 

290 

158 

IQ^ 

240 

291 

142.0 

142.2 

6.1713 

.2030 

159 

152.0 

152.2 

7-9355 
•9747 

196 

162.0 

162.2 

10.1078 
•1559 

241 

172.0 

172.2 

12-7593 

.8177 

292 

142.4 
142.6 
142.8 

.2348 
.2668 
.2989 

159 
1  60 
161 

1524 
152.6 
152.8 

8.0141 
•0536 
•0934 

197 
198 
199 

162.4 
162.6 
162.8 

.2042 
.2526 
•3013 

241 
242 

243 

172.4 
172.6 
172.8 

.8764 
•9353 
•9945 

293 
295 
296 

161 

199 

244 

297 

143.0 

143.2 

1434 
143.6 
143.8 

6.3312 
.3636 
.3961 
.4288 
.4616 

162 

163 
164 
164 

153.0 

153-2 
1534 
153-6 
153.8 

8.1332 
•1733 
•2135 
•2539 
.2944 

200 

2OI 
2O2 
203 

163.0 

163.2 
163.4 
163.6 
163.8 

10.3501 
•3992 
.4484 

•4979 
•  5475 

245 

246 

247 
248 

173.0 

173.2 
1734 
173-6 
173-8 

13.0538 
•"34 
.1732 

•  2332 
•2935 

298 
299 
300 
301 

165 

2O4 

249 

3°3 

144.0 

144.2 

6.4946 
•5277 

166 

-rf.fi 

154.0 

154.2 

8-3351 
•376o 

205 

164.0 

164.2 

10.5974 
.6474 

250 

174.0 

174.2 

13.3540 
.4147 

304 

144.4 
144.6 
144.8 

.5610 

•5944 
.6279 

1DO 

167 
1  68 

154-4 
154.6 
154-8 

.4171 
4583 
•4997 

2O5 
206 
207 

164.4 
164.6 
164.8 

.6976 
.7480 
.7986 

25  I 
252 

253 

174.4 
174.6 
174-8 

•4756 
.5368 
.5982 

3°5 
306 

307 

168 

208 

254 

308 

145.0 

145.2 

6.6616 
•  6954 

169 

T  nr\ 

155.0 

155-2 

8.5413 
•5830 

209 

Tlf~\ 

165.0 

165.2 

10.8495 
.9005 

255 

ozf, 

175.0 

175-2 

I3-6599 
.7218 

309 

1454 

.7294 

170 

1554 

.6249 

^  JLU 

165.4 

•9517 

250 

o  r*? 

1754 

.7839 

3" 

145.6 
145.8 

.7635 
•  7978 

171 

155-6 
155-8 

.6670 
.7092 

211 

165.6 
165.8 

11.0032 
.0548 

257 
258 

175-6 
175.8 

.8462 
.9088 

312 
313 

172 

212 

259 

314 

146.0 

6.8322 

TT> 

156.0 

8.7516 

OT  *) 

166.0 

11.1067 

if\r\ 

176.0 

13.9716 

146.2 
146.4 
146.6 
146.8 

.8668 
.9015 
•9363 
•9713 

173 

174 
174 
175 

156.2 
156.4 
156.6 
156.8 

•7942 
.8370 

•8799 
.9231 

213 
214 

215 
216 

166.2 
166.4 
166.6 
166.8 

•1587 
.2109 
.2634 
.3160 

^DU 

261 
262 
263 

176.2 
176.4 
176.6 
176.8 

14.0347 
.0980 
.1616 
•  2253 

317 
319 

176 

217 

264 

320 

147.0 

147.2 
147.4 
147.6 
147.8 

7-0065 
.0418 

•0773 
.1129 
.1486 

177 
177 
178 
179 

157.0 

157-2 
1574 
157.6 
157-8 

8.9664 
9.0098 
•0535 
•0973 

217 

218 

219 

220 

167.0 

167.2 
167.4 
167.6 
167.8 

11.3689 
.4220 
•4752 
•  5287 
.5824 

265 
266 
267 
268 

177.0 

177.2 

177-4 
177.6 
177.8 

14.2894 
•3536 
.4181 
.4828 
•5478 

321 
323 
324 
325 

1  80 

221 

270 

326 

148.0 

148.2 
148.4 
148.6 

7-1845 
.2206 
.2568 
.2932 

180 
181 
182 

TQ~ 

158.0 

158.2 
158.4 
158.6 

9-1855 
.2299 

•  2745 
.3192 

222 
223 
224 
ooc* 

168.0 

168.2 
168.4 
168.6 

11.6363 
.6904 

•7447 
•7993 

271 
272 
273 

O*7  A 

178.0 

178.2 
178.4 
178.6 

14.6131 
•6785 
•  7443 
.8102 

327 
329 
330 

148.8 

.3297 

IO3 

158.8 

.3641 

225 

168.8 

.8540 

274 

178.8 

.8764 

33  J 

183 

226 

275 

332 

149.0 

149.2 
149.4 
149.6 
149.8 

7.3664 
.4032 
.4402 
•4774 
.5147 

184 

185 
186 
187 
187 

159.0 

159.2 
1594 
159-6 
159.8 

9.4092 
4545 
•4999 
.5456 
•59I4 

226 

227 
228 
229 
230 

169.0 

169.2 
169.4 
169.6 
169.8 

11.9090 
.9641 
12.0195 

•0751 
.1309 

276 

277 
278 

279 
280 

179.0 

179.2 

1794 
179.6 
179-8 

14.9429 
15.0096 
.0765 
•  1437 

.2112 

334 
335 
336 
337 
339 

SMITHSONIAN  TABLES. 


126 


TABLE  35. 


PRESSURE    OF   AQUEOUS   VAPOR. 

(Brock.} 
ENGLISH    MEASURES. 


Temper- 
ature. 

Vapor 
Pressure. 

Diff. 

for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

F. 

Inches. 

F. 

Inches. 

F. 

Inches. 

F. 

Inches. 

I80?0 

180.2 

15.2789 
•  3468 

340 

I90?0 

190.2 

19.0009 
.0825 

408 

200?0 

200.2 

23.4530 
•5502 

486 

,,00 

2IO?0 

210.2 

28.7497 
.8651 

577 

C*7fi 

180.4 
180.6 
180.8 

4150 

4835 
.5522 

342 
344 

190.4 
190.6 
190.8 

.1643 
.2464 
.3288 

409 
411 
412 

200.4 
2OO.6 
200.8 

.6478 

•7457 
.8440 

400 

490 
491 

210.4 
210.6 
210.8 

.9809 
29.0972 
.2138 

o/y 

581 
583 

345 

414 

493 

585 

181.0 

181.2 
181.4 
181.6 
181.8 

15.6212 
.6904 

•7599 
.8296 
.8996 

346 
347 
349 
350 

191.0 

191.2 
191.4 
191.6 
191.8 

I94H5 
4945 
.5778 
.6614, 
•7453 

415 
416 
418 
419 

201.0 

2OI.2 
201.4 
201.6 
201.8 

23.9426 
24.0415 
.1408 
.2404 
.3404 

495 

497 
498 
500 

211.0 

2II.2 
2II.4 
2II.6 
2II.8 

29.3308 
.4482 
.5660 
.6842 
.8028 

587 
589 
591 

593 

351 

421 

502 

595 

182.0 

182.2 
182.4 
182.6 
182.8 

15.9699 
16.0404 

.1112 
.1822 
.2535 

353 

354 
355 
357 

192.0 

192.2 
192.4 
192.6 
192.8 

19.8295 
.9140 
.9988 
20.0839 
.1693 

422 

424 
426 
427 

202.0 

2O2.2 
202.4 
202.6 
202.8 

24.4407 

.5414 
.6424 

.7438 
.8455 

503 
505 
507 
509 

212.0 

212.2 
212.4 
212.6 
212.8 

29.9218 
30.0412 
.l6lO 
.2813 
.4019 

597 
599 
601 
603 

358 

429 

510 

605 

183.0 

183.2 
183.4 
183-6 
183.8 

16.3250 
.3968 
4689 
.5413 
.6139 

359 
361 
362 
363 

193.0 

193.2 

1934 
193.6 

193.8 

20.2550 
.3410 
4273 

430 

432 
433 
435 

203.0 

203.2 
203.4 
203.6 
203.8 

24.9476 
25.0500 
.1528 
.2559 
•3594 

512 

213.0 

213.2 
2134 
213.6 
213.8 

30.5229 

.6444 
.7662 
.8885 
3I.OIII 

607 
609 
611 
613 

364 

436 

519 

615 

184.0 

184.2 
184.4 
184.6 
184.8 

16.6868 

•7599 
.8334 
.9071 
.9810 

366 
367 
368 
370 

194.0 

194.2 

194-4 
194.6 
194.8 

20.6881 
.7756 
.8635 
.9517 
21.0402 

438 
439 
441 

442 

204.0 

204.2 
204.4 
204.6 
204.8 

254633 
.5675 
.6720 
.7769 
.8822 

52i 
523 
525 
527 

214.0 

3I-I342 

185.0 

185.2 

17-0552 
.1297 

37i 
373 

o>7  A 

195.0 

195.2 

21.1289 
.2180 

446 

A  A'J 

205.0 

205.2 

25.9878 
26.0939 

528 
530 

185.4 
185.6 
185.8 

•2045 
•2795 
.3548 

374 
375 
377 

1954 
195.6 
195-8 

.3074 
•3971 
4872 

44  / 

449 
450 

205.4 
205.6 
205.8 

.2002 
.3070 
4141 

534 
536 

378 

452 

537 

186.0 

186.2 

17.4304 
.5063 

379 

196.0 

196.2 

21.5776 
.6683 

454 

A  CC 

206.0 

206.2 

26.5215 
.6294 

539 

C  A  T 

186.4 
186.6 
186.8 

.5824 
.6588 

•7355 

382 
384 

196.4 
196.6 
196.8 

•7593 
.8506 
.9422 

455 
457 
458 

206.4 
206.6 
206.8 

.7376 
.8461 

•9551 

541 
543 
545 

385 

460 

547 

187.0 

187.2 

1874 
187.6 

17.8125 
.8897 
.9672 
18.0451 

386 
388 
389 

197.0 

197.2 
197.4 
197.6 

22.0342 
.1265 
.2191 
.3120 

462 

463 
465 
A  66 

207.0 

207.2 
207.4 
207.6 

27.0644 
.1741 
.2842 
.3946 

549 

550 
552 

CC  A 

187.8 

.1231 

39  1 

197.8 

4053 

4.00 

207.8 

.5054 

554 

392 

468 

556 

188.0 

18.2015 

198.0 

22.4989 

A*JC\ 

208.0 

27.6l66 

188.2 

.2802 

393 

198.2 

.5928 

4/u 

208.2 

.7282 

55° 

188.4 
188.6 
188.8 

-359I 
4383 
.5178 

395 
396 
398 

198.4 
198.6 
198.8 

.6871 
.7816 
•8765 

47  I 
473 
475 

208.4 
208.6 
208.8 

.8402 

.9525 
28.0652 

562 
564 

399 

476 

566 

189.0 

189.2 
1894 
189.6 
189.8 

18.5976 
.6777 
.758i 
.8388 
.9197 

400 
402 
403 
405 
406 

199.0 

199.2 
199.4 
199.6 
199.8 

22.9718 
23.0673 
.1632 
.2595 

478 
480 
481 
483 
485 

209.0 

209.2 
209.4 
209.6 
209.8 

28.1784 
.2919 

4057 
.5200 
.6346 

568 
569 

573 
575 

SMITHSONIAN  TABLES. 


127 


TABLE  36. 


PRESSURE    OF  AQUEOUS   VAPOR. 

(Brock.} 
METRIC    MEASURES. 


Tempera- 
ture. 

0?0 

0?l 

0?2 

0?3 

0?4 

0?5 

0?6 

0?7 

0?8 

0?9 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

-29° 

0.42 

0.4I 

0.41 

0.41 

0.40 

0.40 

0.40 

0.39 

0-39 

0.38 

28 

0.46 

0.46 

0-45 

0-45 

0.44 

0.44 

0-43 

0.43 

0-43 

0.42 

27 

0.50 

0.50 

0.50 

0.49 

0.49 

0.48 

0.48 

0.47 

0-47 

0.46 

26 

0-55 

0-55 

o-54 

0-54 

0-53 

0-53 

0.52 

0.52 

0.51 

0.51 

-25 

0.61 

O.6o 

0.60 

0.59 

0.58 

0.58 

0-57 

0.57 

0.56 

0.56 

24 

0.66 

0.66 

0.65 

0.65 

0.64 

0.63 

0.63 

0.62 

0.62 

0.61 

23 

o.73 

0.72 

0.71 

0.71 

0.70 

0.69 

0.69 

0.68 

0.68 

0.67 

22 

21 

0.79 
0.87 

0.79 
0.86 

0.78 
0.85 

0-77 
0.84 

0.77 
0.84 

0.76 
0.83 

0-75 
0.82 

o.75 
0.81 

0.74 
0.81 

o.73 
0.80 

-20 

0.94 

0.94 

0-93 

0.92 

0.91 

0.90 

0.90 

0.89 

0.88 

0.87 

19 

1.03 

1.02 

I.OI 

1.00 

0.99 

0-99 

0.98 

0.97 

0.96 

o.95 

18 

1.  12 

I.  II 

I.IO 

1.09 

1.  08 

1.07 

1.  06 

1.06 

1.05 

^•04 

17 

1.22 

1.  21 

1.20 

I.I9 

1.18 

I.I7 

1.16 

•15 

1.14 

1.13 

16 

1.32 

I-3I 

1-30 

1.29 

1.28 

1.27 

1.26 

•25 

1.24 

1.23 

-  15 

•44 

1-43 

1.42 

1.40 

1-39 

1.38 

1-37 

•36 

1-35 

1-34 

14 

•56 

1-55 

i-54 

1.52 

1.51 

1.50 

1.49 

.48 

1.46 

1.45 

13 

.69 

1.68 

1.67 

1.65 

1.64 

1.63 

1.61 

.60 

1.59 

1-57 

12 

.84 

1.82 

1.81 

1-79 

1.78 

I.76 

1-75 

-74 

1.72 

1.71 

II 

•99 

1.97 

1.96 

1.94 

1-93 

I.9I 

1.90 

.88 

1.87 

1.85 

-  10 

2-15 

2.13 

2.12 

2.10 

2.08 

2.07 

2.05 

2.04 

2.O2 

2.00 

9 

2-33 

2.31 

2.29 

2.27 

2.26 

2.24 

2.22 

2.  2O 

2.19 

2.17 

8 

2.51 

2.50 

2.48 

2.46 

2.44 

2.42 

2.40 

2.38 

2.36 

2.34 

7 

2.72 

2.69 

2.67 

2.65 

2.63 

2.6l 

2-59 

2.57 

2-55 

2-53 

6 

2-93 

2.91 

2.89 

2.86 

2.84 

2.82 

2.80 

2.78 

2.76 

2.74 

-    5 

3-i6 

3-14 

3-n 

3-09 

3-07 

3-04 

3-02 

3.00 

2.98 

2-95 

4 

3-4i 

3.38 

3.36 

3-33 

3.3i 

3.28 

3.26 

3-23 

3.21 

3-i8 

3 

3-67 

3-64 

3-62 

3-59 

3.56 

3-54 

3.51 

3.48 

346 

3-43 

2 

3-95 

3-92 

3-89 

3-86 

3-84 

3-8i 

3.78 

3-75 

3-72 

3-70 

I 

4-25 

4.22 

4.19 

4.16 

4.13 

4.10 

4.07 

4.04 

4.01 

3.98 

-    0 

4-57 

4-54 

4-50 

4-47 

4.44 

4.41 

4.37 

4-34 

4-31 

4.28 

Values  for  temperatures  between  o°  and  45°  are  given  in  Table  43. 

+  45° 

71.36 

71-73 

72.10 

72.48 

72.85 

72.23 

73.60 

73.98 

74.36 

74-75 

46 

75-13 

75.52 

75-91 

76.30 

76.69 

77-08 

77-47 

77.87 

78.27 

78.67 

47 

79.07 

79-47 

79-88 

80.29 

80.70 

8i.ii 

81.52 

81.93 

82.35 

82.77 

48 

83.19 

83.61 

84.03 

84.46 

84.89 

84.32 

85.75 

86.18 

86.61 

87-05 

49 

87.49 

87.93 

88.37 

88.81 

89.26 

89.71 

90.16 

90.6l 

91.06 

9L52 

50 

91.98 

92.44 

92.90 

93.36 

93.83 

94-30 

94-77 

95-24 

95.71 

96.19 

5i 

96.66 

97.14 

97.63 

98.11 

98.60 

99.08 

99-57 

100.07 

100.56 

101.06 

52 

101.55 

102.05 

102.56 

103.06 

103.57 

104.08 

104.59 

105.10 

105.62 

106.14 

53 

106.65 

107.18 

107.70 

108.23 

108.76 

109.29 

109.82 

H0.35 

110.89 

111.43 

54 

111.97 

112.52 

113.06 

113.61 

114.16 

114.72 

115.27 

H5.83 

116.39 

116.95 

55 

117.52 

118.08 

118.65 

119.22 

119.80 

120.37 

120.95 

121.53 

122.12 

122.70 

56 

123.29 

123.88 

124.48 

125-07 

125.67 

126.27 

126.87 

127.48 

128.09 

128.70 

57 

129.31 

129.92 

130.54 

131.16 

I3L79 

132.41 

133-04 

133.67 

134.30 

134-94 

58 

135.58 

136.22 

136.86 

137.50 

138.15 

138.80 

139.46 

140.11 

140.77 

I4L43 

59 

142.10 

142.76 

143-43 

144.11 

144.78 

145.46 

146.  14 

146.82 

147.51 

148.19 

60 

148.88 

149.58 

150.27 

150.97 

151.68 

152.38 

153-09 

153.80 

154.51 

155-23 

SMITHSONIAN  TABLES. 


128 


TABLE  36. 


PRESSURE    OF   AQUEOUS   VAPOR. 

(Brock.) 
METRIC    MEASURES. 


Tempera- 
ture. 

0?0 

0?l 

0?2 

0?3 

0?4 

0?5 

0?6 

0?7 

0?8 

0?9 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

60° 

148.88 

149.58 

150.27 

150.97 

151.68 

152.38 

I53.09 

153-80 

154.51 

155.23 

61 

155-95 

156.67 

157-39 

158.12 

158.85 

159.58 

160.32 

161.06 

161.80 

162.54 

62 

163.29 

164.04 

164.79 

165.55 

166.31 

167.07 

167.83 

168.60 

169.37 

170.15 

63 

170.92 

171.70 

172.49 

173.27 

174.06 

I74-85 

175.65 

176.45 

I77-25 

178-05 

64 

178.86 

179.67 

180.48 

181.30 

182.12 

182.94 

183.77 

184.60 

185.43 

186.26 

65 

187.10 

187.94 

188.79 

189.64 

190.49 

I9L34 

192.20 

193.06 

I93.93 

194.80 

66 

195.67 

196.54 

197.42 

198.30 

199.18 

200.07 

200.96 

201.86 

202.75 

203.65 

67 

204.56 

205.47 

206.38 

207.29 

208.21 

209.13 

210.06 

210.98 

211.92 

212.85 

68 

213.79 

214.73 

215.68 

216.63 

217.58 

218.54 

219.50 

220.46 

221.43 

222.40 

69 

223.37 

224.35 

225.33 

226.31 

227.30 

228.29 

229.29 

230.29 

231.29 

232.30 

70 

233.3I 

234.32 

235.34 

236.36 

237.39 

238.42 

239-45 

240.48 

241.52 

242.57 

7i 

243.62 

244.67 

245.72 

246.78 

247.85 

248.91 

249.98 

251.06 

252.14 

253.22 

72 

254.30 

255.40 

256.49 

257.59 

258.69 

259-80 

260.91 

262.02 

263.14 

264.26 

73 

265.38 

266.51 

267.65 

268.79 

269.93 

271.08 

272.23 

273.38 

274.54 

275.70 

74 

276.87 

278.04 

279.21 

280.39 

281.58 

282.76 

283.95 

285.15 

286.35 

287.56 

75 

288.76 

289.98 

291.19 

292.42 

293.64 

294.87 

296.11 

297.34 

298.59 

299.83 

76 

301.09 

302.34 

303.60 

304.87 

306.14 

307.41 

308.69 

309.97 

311.26 

312.55 

77 

313.85 

315.15 

316.45 

317.76 

319.07 

320.39 

321.72 

323.04 

324.38 

325.71 

78 

327.05 

328.40 

329.75 

331.11 

332.47 

333.83 

335.20 

336.58 

337-95 

339-34 

79 

340.73 

342.12 

343.52 

344.92 

346.33 

347-74 

349.16 

350.58 

352.01 

353-44 

80 

354.87 

356.31 

357.76 

359-21 

360.67 

362.13 

363.59 

365.07 

366.54 

368.02 

81 

369-51 

371.00 

372.49 

374-00 

375.50 

377-01 

378-53 

380.05 

381.58 

383-11 

82 

384.64 

386.18 

387.73 

389-28 

390.84 

392.40 

393.97 

395-54 

397.12 

398.70 

83 

400.29 

401.89 

403.49 

405.09 

406.70 

408.32 

409.94 

4H.56 

4I3.I9 

414.83 

84 

416.47 

418.12 

419.77 

421.43 

423.09 

424.76 

426.44 

428.12 

429.81 

43L50 

85 

433.19 

434.90 

436.60 

438.32 

440.04 

441.76 

443-49 

445-23 

446.97 

448.72 

86 

450.47 

452.23 

454.00 

455.77 

457.54 

459-33 

461.11 

462.91 

464.71 

466.51 

87 

468.32 

470.14 

471.96 

473.79 

475.63 

477-47 

479-32 

481.17 

483.03 

484.89 

88 

486.76 

488.64 

490.52 

492.41 

494-31 

496.21 

498.12 

500.03 

501-95 

503.87 

89 

505.81 

507.74 

509-69 

511.64 

513.60 

515.56 

517.53 

519.50 

521.48 

523.47 

90 

52547 

527.47 

529-48 

531.49 

533.51 

535-54 

537-57 

539.6i 

541-65 

543-71 

91 

545-77 

547.83 

549-9° 

55L98 

554-07 

556.16 

558.26 

560.36 

562.47 

564.59 

92 

566.71 

568.85 

570.98 

573.13 

575.28 

577-44 

579-61 

581.78 

583-96 

586.14 

93 

588.33 

590.53 

592.74 

594-95 

597.17 

599-40 

601.64 

603.88 

606.  13 

608.38 

94 

610.64 

612.91 

615.19 

617.47 

619.76 

622.06 

624.37 

626.68 

629.00 

631.32 

95 

633-66 

636.00 

638.35 

640.70 

643.06 

645.43 

647.81 

650.20 

652.59 

654.99 

96 

657.40 

659.81 

662.23 

664.66 

667.  10 

669.54 

672.00 

674.45 

676.92 

679.40 

97 

681.88 

684.37 

686.87 

689.37 

691.89 

694.41 

696.93 

699.47 

702.02 

704.57 

98 

707.13 

709.69 

712.27 

714.85 

717.44 

720.04 

722.65 

725-27 

727-89 

730.52 

99 

733-16 

735.81 

738.46 

74I.I3 

743.80 

746.48 

749-17 

751.86 

754.57 

757.28 

100 

760.00 

762.73 

765.47 

768.21 

770.97 

773-73 

776.50 

779.28 

782.07 

784.86 

101 

787-67 

SMITHSONIAN  TABLES. 


129 


TABLE    37. 

PRESSURE    OF   AQUEOUS   VAPOR    AT    LOW   TEMPERATURES. 

(C.  F.  Marvin.} 
ENGLISH    AND    METRIC    MEASURES. 


Tempera- 
tures. 

0?0 

0?2 

0?4 

0?6 

0?8 

F. 

Inch. 

mm. 

Inch. 

mm. 

Inch. 

mm. 

Inch. 

mm. 

Inch. 

mm. 

-60° 

0.0010 

0.026 

59 

.0011 

.028 

O.OOII 

0.028 

O.OOII 

0.027 

O.OOII 

0.027 

o.ooro 

0.026 

58 

.0012 

.030 

.0012 

.030 

.0011 

.029 

.0011 

.029 

.0011 

.028 

57 

.0013 

.032 

.0013 

•032 

.OOI2 

.031 

.0012 

.031 

.0012 

.030 

56 

.0013 

•034 

.0013 

•034 

.0013 

•033 

.0013 

•033 

.0013 

.032 

-55° 

0.0015 

0.037 

0.0014 

0.036 

0.0014 

0.036 

0.0014 

0.035 

0.0014 

0.035 

54 

.0016 

.040 

.0015 

•039 

.0015 

•039 

.0015 

.038 

.0015 

•037 

53 

.0017 

•043 

.0017 

.042 

.0017 

.042 

.OOl6 

.041 

.0016 

.040 

52 

.0018 

.046 

.0018 

•045 

.0018 

.045 

.0017 

.044 

.0017 

.043 

5i 

.0019 

.049 

.0019 

.048 

.0019 

.048 

.0019 

.047 

.0018 

.046 

-50° 

O.OO2I 

0.053 

0.0020 

0.052 

0.0020 

0.051 

O.OO2O 

0.051 

O.OO2O 

0.050 

49 

.0022 

•057 

.0022 

.056 

.OO22 

•055 

.OO22 

•055 

.0021 

.054 

48 

.0024 

.061 

.0024 

.060 

.0023 

•059 

.0023 

.059 

.0023 

.058 

47 

.0026 

.065 

.0025 

.064 

.0025 

.063 

.0025 

.063 

.0024 

.062 

46 

.0027 

.069 

.0027 

.068 

.OO27 

.068 

.0026 

.067 

.0026 

.066 

-45° 

0.0029 

0.074 

0.0029 

0.073 

O.OO28 

0.072 

O.OO28 

0.071 

0.0028 

0.070 

44 

.0031 

.079 

.0031 

.078 

.0030 

.077 

.0030 

.076 

.0030 

.075 

43 

.0033 

.084 

•0033 

.083 

.0032 

.082 

.0032 

.081 

.0031 

.080 

42 

.0035 

.089 

•0035 

.088 

.0034 

.087 

.0034 

.086 

.0033 

.085 

41 

.0037 

.094 

.0037 

•093 

.0036 

.092 

.0036 

.091 

•0035 

.090 

-40° 

0.0039 

O.IOO 

0.0039 

0.098 

0.0038 

0.097 

0.0038 

0.096 

0.0037 

0.095 

39 

.0041 

.105 

.0041 

.104 

.OO4I 

.103 

.OO4O 

.102 

.OO4O 

.101 

38 

.0044 

.III 

.0043 

.109 

.0043 

.108 

.0042 

.107 

.OO42 

.106 

37 

.0046 

.117 

.0045 

•US 

.0045 

.114 

.0044 

•113 

.0044 

.112 

36 

.0048 

.123 

.0048 

.121 

.0047 

.120 

.0047 

.119 

.0046 

.118 

-35° 

0.0051 

0.130 

0.0051 

O.I29 

0.0050 

O.I27 

O.OO5O 

0.126 

O.OO49 

0.124 

34 

.0054 

.138 

.0054 

.136 

•0053 

•135 

.0052 

•133 

.0052 

.132 

33 

.0057 

,146 

.0057 

.144 

.0056 

.142 

.0056 

.141 

•0055 

•139 

32 

.0061 

.155 

.0060 

•153 

.0059 

.151 

.0059 

.149 

.0058 

.147 

3i 

.0065 

.165 

.0064 

.163 

.0063 

.161 

.0063 

•159 

.0062 

•157 

-30° 

0.0069 

0.176 

0.0069 

0.174 

0.0067 

O.I7I 

O.OO67 

0.169 

0.0066 

0.167 

29 

.0074 

.187 

.0073 

.185 

.OO72 

.183 

.0071 

.180 

.0070 

.178 

28 

.0078 

.199 

.0078 

.197 

.0077 

'*95 

.0076 

.192 

.0075 

.190 

27 

.0083 

.212 

.0083 

.2IO 

.008l 

.207 

.0080 

.204 

.0080 

.202 

26 

.0089 

.225 

.0088 

.223 

.0087 

.220 

.0085 

.217 

.0085 

.215 

-25° 

0.0094 

0.239 

0.0093 

0.236 

0.0092 

0.233 

O.OO9I 

0.230 

0.0089 

0.227 

24 

.0100 

•253 

.0098 

.250 

.0097 

.247 

.0096 

.244 

.0095 

.242 

23 

.0106 

.268 

.OIO4 

.265 

.0103 

.262 

.0102 

•259 

.0101 

.256 

22 

.0112 

.284 

.0111 

.281 

.0109 

.278 

.0108 

.274 

.0107 

.271 

21 

.OII9 

.301 

.0117 

.297 

.OIl6 

.294 

.0115 

.291 

.0113 

.287 

-20° 

0.0126 

0.319 

0.0124 

0.315 

0.0122 

0.3II 

O.OI2I 

0.308 

O.OI2O 

0.304 

J9 

•0133 

.338 

.0131 

•334 

.0130 

•330 

.0128 

.326 

.0127 

.322 

18 

.0141 

•358 

.0139 

•354 

.0138 

•350 

.0136 

.346 

.0135 

•342 

17 

.0150 

.380 

.0148 

•375 

.0146 

•371 

.0144 

.366 

.0143 

.362 

16 

.0159 

.403 

.0157 

.398 

•0155 

•393 

•0153 

.389 

.0151 

.384 

-15° 

0.0168 

0.427 

0.0166 

0.422 

0.0164 

0.417 

0.0162 

0.412 

0.0160 

0.407 

SMITHSONIAN  TABIES. 


130 


TABLE  37. 
PRESSURE    OF   AQUEOUS   VAPOR    AT    LOW   TEMPERATURES. 

(C.  F.  Marvin.} 
ENGLISH    AND    METRIC    MEASURES. 


Tempera- 
ture. 

0?0 

0?2 

0?4 

0?6 

0?8 

F. 

Inch. 

mm. 

Inch. 

mm. 

Inch. 

mm. 

Inch. 

mm. 

Inch. 

mm. 

-15° 

0.0168 

0.427 

0.0166 

0.422 

0.0164 

0.417 

0.0162 

0.412 

0.0160 

0.407 

14 

.0178 

•452 

.0176 

447 

.0174 

442 

.0172 

437 

.0170 

432 

13 

.0188 

.478 

.0186 

473 

.0184 

.468 

.0182 

.462 

.0180 

457 

12 

.0199 

.505 

.0196 

499 

.0194 

494 

.0192 

.488 

.0190 

483 

II 

.0210 

•534 

.0208 

.528 

.0206 

.522 

.0203 

.516 

.0201 

.510 

-10 

O.O222 

0.564 

O.O22O 

0.558 

0.0217 

0.552 

0.0215 

0.546 

0.0213 

0.540 

9 

.0234 

•595 

.0232 

.588 

.0229 

.582 

.0227 

.576 

.0224 

•570 

8 

.0247 

.627 

.0244 

.620 

.0242 

.614 

.0239 

.607 

.0237 

.601 

I 

.0260 
.0275 

.661 
.698 

.0257 
.0272 

•654 
.691 

.0255 
.0269 

.647 
.683 

.0252 
.0266 

.640 
.676 

.0249 
.0263 

$ 

-5 

0.0291 

0.738 

0.0287 

0.730 

0.0284 

0.722 

0.0281 

0.714 

0.0278 

0.706 

4 

.0307 

.781 

.0304 

.772 

.0301 

.764 

.0297 

•755 

.0294 

.747 

3 

.0325 

.826 

.0322 

.817 

.0318 

.808 

.0315 

•799 

.0311 

.790 

2 

•0344 

•873 

.0340 

.863 

•0336 

.854 

.0332 

.844 

.0329 

.835 

I 

•0363 

.922 

•0359 

.912 

•0355 

.902 

.0351 

.892 

•0347 

.882 

—  O 

•0383 

.972 

•0379 

.962 

.0375 

•952 

.0371 

.942 

.0367 

•932 

+  0 

0.0383 

0.972 

0.0387 

0.982 

0.0391 

0.992 

0.0394 

1.002 

0.0398 

I.OI2 

i 

.0403 

1.023 

.0407 

1.033 

.0411 

1.043 

.0415 

1.054 

.0419 

1.064 

2 

.0423 

1-075 

.0428 

1.086 

.0431 

1.096 

.0436 

I.I07 

.0440 

I.II8 

3 

.0444 

1.129 

.0449 

1.140 

•0453 

1.151 

.0458 

1.163 

.0462 

I.I74 

4 

.0467 

1.186 

.0472 

1.198 

.0476 

I.2IO 

.0481 

1.222 

.0486 

1.234 

5 

O.O49I 

1.246 

0.0495 

1.258 

0.0500 

I.27I 

0.0505 

1.283 

O.O5IO 

1.296 

6 

•0515 

1.309 

.0520 

1.322 

.0526 

1-335 

.0531 

1-349 

.0536 

1.362 

7 

.0542 

1.376 

•0547 

1.390 

•0553 

1.404 

.0558 

I.4I8 

.0564 

1-433 

8 

.0570 

1.447 

.0576 

1.462 

.0582 

1.477 

.0587 

1.492 

•0594 

1.508 

9 

.0600 

1-523 

.0606 

1-539 

.0612 

1-555 

.0618 

I.57I 

.0625 

1.587 

10 

0.0631 

1.603 

0.0638 

1.620 

0.0644 

1.636 

0.0651 

1.653 

0.0657 

1.670 

ii 

.0665 

1.688 

.0671 

1.705 

.0678 

1.722 

.0685 

1.740 

.0692 

1.758 

12 

.0699 

1.776 

.0706 

1-794 

.0713 

1.812 

.0720 

1.830 

.0728 

1.848 

13 

•0735 

1.867 

.0742 

1.885 

.0750 

1.904 

.0757 

1.923 

.0765 

1.942 

14 

.0772 

1.961 

.0780 

1.980 

.0787 

1.999 

.0794 

2.018 

.0802 

2.038 

15 

O.oSlO 

2.058 

0.0818 

2.078 

0.0826 

2.098 

0.0834 

2.II8 

0.0842 

2.138 

16 

.0850 

2.158 

.0857 

2.178 

.0866 

2.199 

.0874 

2.220 

.0882 

2.241 

17 

.0891 

2.262 

.0899 

2.283 

.0907 

2.305 

.0916 

2.327 

.0925 

2.349 

18 

•0933 

2.371 

.0942 

2.393 

.0951 

2.416 

.0960 

2439 

.0969 

2.462 

*9 

.0979 

2.486 

.0988 

2.510 

.0998 

2-534 

.1007 

2.558 

.1017 

2.582 

20 

0.1026 

2.607 

0.1036 

2.632 

0.1046 

2.657 

.0.1056 

2.683 

0.1067 

2.709 

21 

.1077 

2.735 

.1087 

2.761 

.1098 

2.788 

.1108 

2.815 

.1119 

2.842 

22 

.1130 

2.869 

.1141 

2.897 

.1152 

2.925 

.1163 

2-953 

.1174 

2.981 

23 

.1185 

3.009 

.1196 

3-037 

.1207 

3.066 

.1219 

3.095 

.1230 

3-I25 

24 

.1242 

3.155 

.1254 

3-185 

.1266 

3-215 

.1278 

3-245 

.1290 

3-276 

25 

0.1302 

3.307 

0.1314 

3.338 

0.1327 

3-370 

0.1339 

3402 

0.1352 

3434 

26 

.1365 

3466 

.1377 

3.498 

.1390 

3-531 

.1403 

3.564 

.1416 

3.597 

27 

.1430 

3-631 

•1443 

3-665 

.1456 

3.699 

.1470 

3-733 

.1483 

3.768 

28 

.1497 

3.803 

.1511 

3.838 

.1525 

3.874 

•1539 

3.910 

•1554 

3-946 

29 

.1568 

3.982 

.1582 

4.018 

.1596 

4.055 

.l6ll 

4-093 

.1626 

4-131 

30 

O.I64I 

4.169 

0.1656 

4.207 

0.1671 

4.245 

0.1687 

4.284 

0.1702 

4-324 

3i 

.I7l8 

4-364 

•1734 

4.404 

.1750 

4444 

.1766 

4485 

.1782 

4-526 

32 

.1798 

4-568 

SMITHSONIAN  TABLES. 


TABLE   38. 


WEIGHT    OF    AQUEOUS    VAPOR    IN    A    CUBIC    FOOT    OF 
SATURATED     AIR. 

ENGLISH    MEASURES. 


Temper- 
ature. 

0?0 

0?5 

Diff. 
for 
0?l 

Temper- 
ature. 

0?0 

0?5 

Diff. 
for 
0?l 

Temper- 
ature. 

0?0 

0?5 

Diff. 
for 
0?l 

Pm 

Grains 

Grains 

P_ 

Grains 

Grains 

Grains 

Grains 

troy. 

troy. 

troy. 

troy. 

• 

troy. 

troy. 

-19° 

0.230 

0.224 

i 

26° 

I-675 

1.709 

7 

71° 

8.240 

8.372 

27 

-18 

.242 

•236 

i 

27 

1-743 

1.777 

7 

72 

8.508 

8.644 

27 

-17 

•254 

.248 

i 

28 

1.812 

1.847 

7 

73 

8.782 

8.923 

28 

-16 

.267 

.260 

i 

29 

1.882 

1.919 

7 

74 

9.066 

9-2IO 

29 

-15 

0.280 

0.273 

i 

30 

1.956 

1-995 

8 

75 

9-356 

9.504 

30 

-14 

.294 

.286 

i 

3i 

2.034 

2.073 

8 

76 

9.655 

9.807 

3i 

-13 

.309 

.301 

i 

32 

2.113 

2-153 

8 

77 

9.962 

IO.II8 

32 

—  12 

.324 

.316 

2 

33 

2-194 

2.236 

8 

78 

10.277 

10.438 

33 

—  II 

.340 

•332 

2 

34 

2.279 

2.322 

9 

79 

10.601 

10.766 

33 

-10 

0.356 

0.348 

2 

35 

2.366 

2.411 

9 

80 

10.934 

11.103 

34 

—  9 

•373 

.365 

2 

36 

2-457 

2-503 

9 

81 

11.275 

11.450 

35 

—   8 

•391 

.382 

2 

37 

2-550 

2.598 

10 

82 

11.626 

11.805 

36 

-   7 

.411 

.400 

2 

38 

2.646 

2.695 

10 

83 

11.987 

12.170 

37 

—   6 

•430 

.420 

2 

39 

2*746 

2.797 

10 

84 

12.356 

12.545 

38 

-   5 

0.450 

0-439 

2 

40 

2.849 

2.901 

II 

85 

12.736 

12.930 

39 

-   4 

.471 

.460 

2 

4i 

2-955 

3-009 

II 

86 

13.127 

13.325 

40 

-   3 

•493 

.482 

2 

42 

3.064 

3.120 

II 

87 

13.526 

13.730 

4i 

—     2 

.516 

.504 

2 

43 

3-177 

3-235 

12 

88 

13.937 

14.146 

42 

—     I 

.540 

.528 

2 

44 

3-294 

3-354 

12 

89 

14.359 

14.573 

43 

—    0 

•564 

•552 

2 

+  o 

0.564 

0-577 

3 

45 

3.414 

3-477 

12 

90 

14.790 

15.011 

44 

i 

•590 

.603 

3 

46 

3-539 

3-603 

13 

9i 

15.234 

15.460 

45 

2 

.617 

.630 

3 

47 

3-667 

3-733 

13 

92 

15.689 

15.920 

47 

3 

.645 

.659 

3 

48 

3.800 

3.868 

14 

93 

16.155 

16.393 

48 

4 

.674 

.689 

3 

49 

3-936 

4.006 

14 

94 

16.634 

16.877 

49 

5 

0.705 

0.719 

3 

50 

4.076 

4.148 

15 

95 

17.124 

17-374 

50 

6 

•735 

.751 

3 

5i 

4.222 

4.296 

15 

96 

17.626 

17.883 

52 

8 

fi 

.784 
.819 

3 
4 

52 
53 

4-372 
4-526 

4.448 
4.604 

IS 

16 

97 
98 

18.142 

18.671 

18.404 
18.940 

53 
54 

9 

.837 

.854 

4 

54 

4-685 

4.766 

16 

99 

19.212 

19.487 

55 

10 

0.873 

0.891 

4 

55 

4.849 

4-933 

17 

100 

19.766 

20.049 

57 

ii 

.910 

.930 

4 

56 

5.016 

5-103 

17 

101 

20.335 

20.624 

58 

12 

•950 

•970 

4 

57 

5-191 

5.280 

18 

102 

20.917 

21.214 

60 

13 

.991 

I.  Oil 

4 

58 

5-370 

5-462 

18 

103 

21.514 

2I.8I7 

61 

14 

1-033 

1.054 

4 

59 

5-555 

5.649 

19 

IO4 

22.125 

22.436 

62 

15 

1.077 

1.098 

5 

60 

5-745 

5-842 

20 

105 

22.750 

23.070 

64 

16 

1.  122 

1.144 

5 

61 

5-941 

6.040 

2O 

106 

23.392 

23.718 

66 

17 

1.169 

LI93 

5 

62 

6.142 

6.245 

21 

107 

24.048 

24.382 

67 

18 

I.2I7 

1.242 

5 

63 

6.349 

6.456 

21 

108 

24.720 

25.062 

69 

19 

1.268 

1.294 

5 

64 

6.563 

6.672 

22 

109 

25.408 

25.758 

70 

20 

I-32I 

1-347 

5 

65 

6.782 

6.895 

23 

110 

26.112 

26.470 

72 

21 

1.374 

1.402 

6 

66 

7.009 

7.124 

23 

in 

26.832 

27.199 

74 

22 

1.430 

1-459 

6 

67 

7.241 

7-360 

24 

112 

27.570 

27.946 

75 

23 

1.488 

1.518 

6 

68 

7.480 

7.602 

25 

"3 

28.325 

28.708 

77 

24 

1-549 

1.580 

6 

69 

7.726 

7-852 

25 

114 

29.096 

29.489 

79 

25 

1.611 

1.643 

6 

70 

7-980 

8.109 

26 

115 

29.887 

SMITHSONIAN  TABLES. 


132 


TABLE  39. 

WEIGHT    OF   AQUEOUS   VAPOR    IN    A    CUBIC    METRE 
OF   SATURATED    AIR. 

METRIC    MEASURES. 


Tem- 
pera- 
ture. 

Temper- 
ature. 

0?0 

0?5 

Temper- 
ature. 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

Gram's. 

C. 

Gram's. 

Gram's. 

C. 

Gram's. 

Gram's. 

Gram's. 

Gram's. 

Gram's. 

-29° 

0.496 

-17° 

1-375 

I.32I 

-5° 

3.407 

3-359 

3.3II 

3-263 

3.217 

28 

•542 

16 

1.489 

.432 

4 

3.659 

3.607 

3.556 

3-506 

3.456 

27 

•593 

15 

1.611 

•549 

3 

3.926 

3.871 

3.817 

3-763 

3.7H 

26 

.(47 

M 

1.742 

.676 

2 

4.2II 

4-152 

4.095 

4-038 

3.982 

25 

.706 

J3 

1.882 

.811 

I 

4.513 

4-451 

4-39° 

4.329 

4.270 

24 

.770 

12 

2.032 

.956 

—  0 

4.835 

4-769 

4.704 

4.640 

4.576 

-23 

0.839 

-II 

2.192 

2.III 

+  0 

4.835 

4.901 

4.969 

5-037 

5.106 

22 

•9T3 

10 

2.363 

2.276 

i 

5.176 

5.247 

5.318 

5-391 

5.464 

21 

.992 

9 

2.546 

2-453 

2 

5.538 

5-613 

5-689 

5.766 

5.844 

20 

1.078 

8 

2.741 

2.642 

3 

5-922 

6.002 

6.082 

6.164 

6.246 

!9 

1.170 

7 

2-949 

2.843 

4 

6.430 

6.414 

6.499 

6.585 

6.673 

-18 

1.269 

-  6 

3.I7I 

3-058 

+  5 

6.761 

6.851 

6.941 

7.033 

7.125 

Tem- 
pera- 

0?0 

0?l 

0?2 

0?3 

0?4 

0?5 

0?6 

0?7 

0?8 

0?9 

ture. 

C. 

Gram's. 

Gram's. 

Gram's. 

Gram's. 

Gram's. 

Gram's. 

Gram's. 

Gram's. 

Gram's. 

Gram's. 

+  6° 

7.219 

7.266 

7.313 

7.361 

7.409 

7-457 

7.506 

7-555 

7.614 

7.653 

7 

7.703 

7-753 

7.803 

7.853 

7.904 

7-955 

8.007 

8.058 

8.IIO 

8.162 

8 

8.215 

8.268 

8.321 

8-374 

8.428 

8.482 

8.536 

8.591 

8.646 

8.701 

9 

8.757 

8.813 

8.869 

8.926 

8.982 

9-039 

9.097 

9«I55 

9.213 

9.271 

10 

9.330 

9-389 

9.448 

9.508 

9.568 

9.628 

9.689 

9-750 

9.811 

9-873 

ii 

9-935 

9-997 

I0.o6o 

10.123 

IO.I86 

10.250 

10.314 

10.378 

10.443 

10.508 

12 

10.574 

10.640 

10.  706 

10.773 

10.840 

10.907 

10-975 

11.043 

II.  Ill 

11.180 

13 

11.249 

11.318 

11.388 

11.458 

11.529 

II.600 

11.672 

11.744 

11.816 

u.888 

14 

11.961 

12.035 

12.108 

12.182 

12.257 

12.332 

12.407 

12.483 

12.559 

12.635 

15 

12.712 

12.790 

12.867 

12-945 

13.024 

13.103 

13.182 

13.262 

I3.342 

13-423 

16 

I3-505 

13-586 

13.668 

13.750 

13.833 

13.916 

14.000 

14.085 

14.169 

14.254 

17 

14-339 

14-425 

14.511 

14.598 

14-685 

14-773 

14.861 

14.950 

15-039 

15.128 

18 

15.218 

15-308 

15.399 

I549I 

15.583 

I5-675 

15.768 

15.861 

15-955 

16.049 

19 

16.144 

16.239 

16.335 

16.431 

16.528 

16.625 

16.723 

16.821 

16.920 

17.019 

20 

17.118 

17.218 

17.319 

17.420 

17.522 

17.624 

17.727 

17.830 

17-934 

18.039 

21 

18.143 

18.248 

18.353 

18.460 

18.568 

18.676 

18.784 

18.893 

19.002 

19.111 

22 

19.222 

I9-332 

19.444 

I9-556 

19.668 

19.781 

19.895 

20.009 

20.124 

20.239 

23 

20.355 

20.471 

20.588 

20.706 

20.824 

20.943 

21.062 

21.182 

21.303 

21.424 

24 

21.546 

21.668 

21.791 

21.914 

22.038 

22.163 

22.287 

22.414 

22.541 

22.668 

25 

22.796 

22.925 

23.054 

23.184 

23.3I4 

23.445 

23.577 

23.709 

23.842 

23.975 

26 

24.109 

24.244 

24.380 

24.516 

24.653 

24.790 

24.928 

25.067 

25.207 

25-347 

27 

25.487 

25-629 

25.771 

25.9H 

26.058 

26.202 

26.347 

26.492 

26.639 

26.786 

28 

26.933 

27.082 

27.231 

27-381 

27.531 

27.682 

27.834 

27.988 

28.142 

28.295 

29 

28.450 

28.605 

28.762 

28.919 

29.077 

29.235 

'29.394 

29.555 

29-715 

29.877 

30 

30.039 

30.202 

30.366 

30.530 

30.696 

30.862 

31.029 

3LI97 

31-365 

31-534 

31 

31-704 

31.875 

32.047 

32.219 

32.392 

32.567 

32.741 

32.917 

33-094 

33.27I 

32 

33449 

33.628 

33.807 

33.988 

34.169 

34.351 

34-534 

34.7i8 

34.903 

35-089 

33 

35-275 

35-462 

35-651 

35.840 

36.030 

36.220 

36.412 

36.604 

36.798 

36.992 

34 

37.187 

37.383 

37-580 

37-777 

37.976 

38.176 

38.376 

38.577 

38.780 

38-983 

35 

39-187 

39.390 

39.598 

39-805 

4O.OI2 

4O.22I 

40.431 

40.641 

40.853 

41.065 

36 

41,279 

4L493 

41.708 

41.924 

42.142 

42.360 

42-579 

42.799 

43-020 

43.242 

37 

43465 

43-690 

43-9I4 

44.140 

44.367 

44.596 

44.825 

45.054 

45-286 

45.518 

38 

45  75i 

45.985 

46.220 

46.456 

46.693 

46.931 

47.171 

47.411 

47.653 

47.895 

39 

48138 

48.385 

48.628 

48.875 

49.I23 

49-372 

49.621 

49.872 

50.124 

50.377 

SMITHSONIAN  TABLES. 


133 


TABLE  40. 

REDUCTION    OF    PSYCHROMETRIC    OBSERVATIONS. 

ENGLISH    MEASURES. 
Pressure    of  Aqueous    Vapor. 


Tempera- 
ture. 

0° 

1° 

2° 

3° 

4° 

5° 

6° 

7° 

8° 

9° 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

-30° 

0.007 

0.006 

0.006 

0.006 

0.005 

0.005 

0.005 

0.005 

0.004 

0.004 

—  20 

.013 

.012 

.on 

.Oil 

.OIO 

.009 

.009 

.008 

.008 

.007 

—    10 

.022 

.021 

.020 

.019 

.018 

.017 

.016 

.015 

.014 

.013 

—      0 

.038 

.036 

.034 

•033 

.031 

.029 

.027 

.026 

.025 

.023 

+    0 

0.038 

0.040 

0.042 

0.044 

0.047 

0.049 

0.052 

0.054 

0.057 

O.o6o 

10 

•063 

.066 

.070 

.074 

.077 

.081 

.085 

.089 

•093 

.098 

20 

.103 

.108 

.113 

.118 

.124 

.130 

.136 

•143 

.150 

•157 

Tempera- 
ture. 

0?0 

0?l 

0?2 

0?3 

0?4 

0?5 

0?6 

0?7 

0?8 

0?9 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

+  30° 

0.164 

0.165 

0.166 

0.166 

0.167 

0.168 

0.169 

0.169 

0.170 

O.I7I 

3i 

.172 

•173 

•173 

.174 

•175 

.176 

.177 

.177 

.178 

.179 

32 

.180 

.181 

.181 

.182 

•183 

.184 

.184 

.185 

.186 

.186 

33 

.187 

.188 

.189 

.190 

.190 

.191 

.192 

•193 

•193 

.194 

34 

•195 

.196 

.I96 

.197 

.198 

.199 

.200 

.200 

.201 

.202 

35 

0.203 

0.204 

0.204 

0.205 

0.206 

0.207 

0.208 

0.208 

O.2O9 

0.210 

36 

.211 

.212 

.213 

.213 

.214 

.215 

.216 

.217 

.218 

.219 

37 

.219 

.220 

.221 

.222 

.223 

.224 

.225 

.225 

.226 

.227 

38 

.228 

.229 

.230 

.231 

.232 

•233 

•233 

.234 

•235 

.236 

39 

•237 

.238 

•239 

.240 

.241 

.242 

•243 

.244 

•245 

.246 

40 

0.247 

0.247 

0.248 

0.249 

0.250 

0.251 

0.252 

0.253 

0.254 

0.255 

4i 

.256 

•257 

.258 

•259 

.260 

.261 

.262 

•263 

.264 

.265 

42 

.266 

.267 

.268 

.269 

.270 

.271 

.272 

•273 

.274 

.276 

43 

•277 

.278 

.279 

.280 

.281 

.282 

.283 

.284 

.285 

.286 

44 

.287 

.288 

.289 

.291 

.292 

•293 

.294 

•295 

.296 

•297 

45 

0.298 

0.300 

0.301 

0.302 

0.303 

0.304 

0.305 

0.306 

0.308 

0.309 

46 

.310 

•311 

•312 

.313 

•315 

.316 

•3!7 

.318 

.319 

.321 

47 
48 

.322 

•334 

.323 

•335 

.324 

•337 

3 

.327 
•339 

.328 
•340 

•329 
•342 

•330 

•343 

•332 

•344 

•333 
•345 

49 

•347 

.348 

•349 

•351 

•352 

•353 

•355 

.356 

•357 

•358 

50 

0.360 

0.361 

0.362 

0.364 

0.365 

0.367 

0.368 

0.369 

0.371 

0.372 

5i 

•373 

•375 

.376 

•377 

•379 

.380 

.382 

•383 

•384 

.386 

52 

.387 

•389 

-390 

•392 

•393 

•394 

•396 

•397 

•399 

.400 

53 

.402 

•403 

•405 

.406 

.408 

.409 

.411 

.412 

.414 

.415 

54 

.417 

.418 

.420 

.421 

•423 

.424 

.426 

.427 

•429 

•431 

55 

0.432 

0-434 

0.435 

0-437 

0.438 

0.440 

0.442 

0-443 

0-445 

0.446 

56 

.448 

•450 

•451 

•453 

•455 

.456 

.458 

.460 

.461 

•463 

57 

•465 

.466 

.468 

.470 

.471 

•473 

•475 

.476 

.478 

.480 

58 

.482 

•483 

.485 

.487 

.488 

.490 

.492 

•494 

•495 

•497 

59 

•499 

.501 

•503 

•504 

.506 

.508 

.510 

•512 

.513 

.515 

60 

0.517 

0.519 

0.521 

0.523 

0.524 

0.526 

0.528 

0.530 

0.532 

0-534 

61 

.536 

.538 

•539 

•541 

•543 

•545 

•547 

•549 

•  551 

•553 

62 

•555 

•557 

•559 

.561 

•  563 

.565 

.567 

•569 

•571 

•573 

63 

•575 

•577 

•579 

.581 

•583 

.585 

.587 

.589 

•591 

•593 

64 

•595 

•597 

•599 

.601 

.604 

.606 

.608 

.610 

.612 

.614 

65 

0.616 

0.618 

0.621 

0.623 

0.625 

0.627 

0.629 

0.631 

0.634 

0.636 

66 

.638 

.640 

•643 

•645 

.647 

.649 

.651 

•654 

.656 

.658 

67 

.661 

.663 

.665 

.667 

.670 

.672 

.674 

.677 

.679 

.681 

68 

.684 

.686 

.688 

.691 

•693 

.695 

.698 

.700 

.703 

.705 

69 

.707 

.710 

.712 

•715 

.717 

.720 

.722 

•  725 

.727 

•729 

SMITHSONIAN  TABLES. 


134 


TABLE  4O. 
REDUCTION-OF    PSYCHROMETRIC    OBSERVATIONS. 

ENGLISH    MEASURES. 
Pressure    of  Aqueous   Vapor. 


Tempera- 
ture. 

0?0 

0?l 

0?2 

0?3 

0?4 

0?5 

0?6 

0?7 

0?8 

0?9 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

70° 

0.732 

0-734 

0-737 

0.739 

0.742 

0.744 

0-747 

0.750 

0.752 

0-755 

71 

0.757 

0.760 

0.762 

0.765 

0.768 

0.770 

0-773 

0-775 

0.778 

0.781 

72 

0.783 

0.786 

0.789 

0.791 

0.794 

0.797 

0.799 

0.802 

0.805 

0.807 

73 

O.8lO 

0.813 

0.816 

0.818 

0.821 

0.824 

0.827 

0.830 

0.832 

0.835 

74 

0.838 

0.841 

0.843 

0.846 

0.849 

0.852 

0-855 

0.858 

0.861 

0.863 

75 

0.866 

0.869 

0.872 

0.875 

0.878 

0.881 

0.884 

0.887 

0.890 

0.893 

76 

0.896 

0.899 

0.902 

0.905 

0.908 

0.911 

0.914 

0.917 

0.920 

0.923 

77 

0.926 

0.929 

0.932 

0-935 

0.938 

0.941 

0.944 

0.948 

0.951 

0-954 

78 

0-957 

0.960 

0.963 

0.966 

0.970 

0-973 

0.976 

0.979 

0.982 

0.986 

79 

0.989 

0.992 

0-995 

0.999 

I.OO2 

1.005 

1.009 

1.  012 

I.OI5 

1.019 

80 

i.  022 

1.025 

1.029 

1.032 

1.035 

1.039 

1.042 

1.046 

1.049 

1.052 

81 

1.056 

1.059 

1.063 

1.066 

1.070 

1.073 

1.077 

I.OSO 

1.084 

1.087 

82 

1.091 

1.094 

1.098 

I.  IOI 

I.I05 

1.109 

1.  112 

1.116 

I.II9 

1.123 

83 

1.127 

1.130 

I.I34 

1.138 

I.I4I 

I.I45 

I.I49 

1.152 

1.156 

1.160 

84 

1.163 

1.167 

1.171 

I.I75 

I.I79 

I.I82 

I.I86 

1.190 

I.I94 

1.198 

85 

1.  201 

1.205 

1.209 

1.213 

I.2I7 

1.  221 

1.225 

1.229 

1-233 

1.237 

86 

I.24I 

1.245 

1.248 

1-253 

1.256 

1.260 

1.264 

1.269 

1.273 

1.277 

87 

I.28I 

1.285 

1.289 

1.293 

1.297 

I.30I 

1.305 

1.310 

I.3H 

1.318 

88 

1.322 

1.326 

1.330 

1.335 

1-339 

L343 

1.347 

1-352 

1.356 

1.360 

89 

1.364 

1.369 

1-373 

1.377 

1.382 

1.386 

1.390 

1-395 

1-399 

1.404 

90 

1.408 

I.4I3 

1.417 

1.421 

1.426 

1.430 

1-435 

1.439 

1.444 

1.448 

9i 

1-453 

1.458 

1.462 

1.467 

1.471 

1.476 

1.480 

1.485 

1.490 

1.494 

92 

1.499 

1.504 

1.508 

1.513 

1.518 

1.523 

1.527 

1.532 

1-537 

1.542 

93 

1.546 

I.55I 

I.556 

1.561 

1.566 

I-57I 

1.576 

1.580 

1.585 

1.590 

94 

1-595 

1.  600 

1.605 

1.610 

1.615 

1.620 

1.625 

1.630 

1.635 

1.640 

95 

1.645 

1.650 

1.655 

i.  660 

1.665 

I.67I 

1.676 

1.681 

1.686 

1.691 

96 

1.696 

1.702 

1.707 

1.712 

I.7I7 

1.723 

1.728 

1-733 

1.738 

1.744 

97 

1-749 

1-755 

1.760 

1.765 

1.771 

1.776 

1.781 

1.787 

1.792 

1.798 

98 

1.803 

1.809 

1.814 

1.820 

1.825 

I.83I 

1.837 

1.842 

1.848 

1.853 

99 

1.859 

1.865 

1.870 

1.876 

1.882 

1.887 

1.893 

1.899 

1.905 

1.910 

100 

1.916 

1.922 

1.928 

1-934 

1.939 

1-945 

i.95i 

1-957 

1.963 

1.969 

IOI 

1-975 

1.981 

1.987 

1-993 

1.999 

2.005 

2.0II 

2.017 

2.023 

2.029 

102 

2.035 

2.041 

2.047 

2.053 

2.059 

2.066 

2.072 

2.078 

2.084 

2.090 

103 

2.097 

2.103 

2.109 

2.116 

2.122 

2.128 

2.134 

2.141 

2.147 

2.154 

104 

2.160 

2.166 

2.173 

2.179 

2.186 

2.192 

2.199 

2.205 

2.212 

2.219 

105 

2.225 

2.232 

2.238 

2.245 

2.252 

2.258 

2.265 

2.272 

2.278 

2.285 

106 

2.292 

2.299 

2.305 

2.312 

2.319 

2.326 

2-333 

2.340 

2.346 

2-353 

107 

2.360 

2.367 

2-374 

2.381 

2.388 

2-395 

2.402 

2.409 

2.4l6 

2.423 

108 

2.431 

2.438 

2-445 

2.452 

2.459 

2.466 

2-474 

2.481 

2.488 

2.495 

109 

2.503 

2.510 

2.517 

2.525 

2.532 

2-539 

2-547 

2.554 

2.562 

2-569 

110 

2.576 

2.584 

2-591 

2-599 

2.607 

2.614 

2.622 

2.629 

2.637 

2.645 

in 

2.652 

2.660 

2.668 

2.675 

2.683 

2.691 

2.699 

2.706 

2.714 

2.722 

112 

2.730 

2.738 

2.746 

2.754 

2.762 

2.770 

2-777 

2.785 

2.793 

2.801 

H3 

2.810 

2.818 

2.826 

2.834 

2.842 

2.850 

2.858 

2.866 

2.875 

2.883 

114 

2.891 

2.899 

2.908 

2.916 

2.924 

2-933 

2.941 

2.950 

2.958 

2.966 

115 

2-975 

2.983 

2.992 

3.000 

3-009 

3.017 

3.026 

3-035 

3-043 

3-052 

116 

3.061 

3.069 

3.078 

3.087 

3-095 

3.104 

3-II3 

3.122 

3-131 

3.140 

117 

3.148 

3-157 

3.166 

3-175 

3.184 

3.193 

3.202 

3.211 

3.220 

3-229 

118 

3.239 

3.248 

3-257 

3.266 

3-275 

3.284 

3-294 

3.303 

3-312 

3-321 

119 

3-331 

3-340 

3-349 

3-359 

3.368 

3-378 

3.387 

3-397 

3.406 

3.416 

SMITHSONIAN  TABLES. 


135 


TABLE    41. 

REDUCTION    OF    PSYCHROMETRIC    OBSERVATIONS. 

ENGLISH    MEASURES. 

Values    of  O.OOO367  B  (t-t,)(l +|^y  )- 

B  =  Barometric  pressure. 

t  =  Temperature  of  the  dry-bulb  thermometer. 
/t  =  Temperature  of  the  wet-bulb  thermometer. 


t-t, 

BAROMETRIC  PRESSURE  IN  INCHES  (B). 

30.5 

30.0 

29.5 

29.0 

28.5 

28.0 

27.5 

27.0 

26.5 

26.0 

25.5 

25.0 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch, 

Inch. 

Inch. 

Inch. 

1° 

O.OII 

O.OII 

O.OII 

O.OII 

O.OIO 

O.OIO 

O.OIO 

O.OIO 

O.OIO 

O.OIO 

0.009 

0.009 

2 

.022 

.022 

.022 

.021 

.O2I 

.021 

.O2O 

.O2O 

.019 

.019 

.019 

.018 

3 

-034 

.033 

•033 

.032 

.031 

.031 

.030 

.030 

.029 

.029 

.028 

.027 

4 

•045 

.044 

•043 

•043 

.042 

.041 

.040 

.040 

•039 

.038 

.038 

•037 

5 

0.056 

0.055 

0.054 

0.053 

0.052 

0.052 

0.051 

0.050 

0.049 

0.048 

0.047 

0.046 

6 

.067 

.066 

.065 

.064 

•063 

.062 

.061 

.060 

•059 

.057 

.056 

•055 

7 

.079 

.077 

.076 

•075 

•073 

.072 

.071 

.070 

.068 

.067 

.066 

.064 

8 

.090 

.088 

.087 

.086 

.084 

.083 

.081 

.080 

.078 

.077 

.075 

.074 

9 

.101 

.099 

.098 

.096 

•095 

•093 

.091 

.090 

.088 

.086 

.085 

•  083 

10 

0.113 

O.III 

0.109 

0.107 

0.105 

0.103 

0.102 

O.IOO 

0.098 

0.096 

0.094 

0.092 

ii 

.124 

.122 

.I2O 

.118 

.116 

.114 

.112 

.no 

.108 

.106 

.104 

.102 

12 

.135 

.133 

•I31 

.129 

.126 

.124 

.122 

.120 

.118 

•US 

."3 

.III 

13 

.147 

.144 

.142 

.140 

•137 

•135 

.132 

.130 

.127 

•  125 

.123 

.120 

14 

.158 

.156 

•153 

.150 

.148 

•145 

•143 

.140 

.137 

•135 

.132 

.130 

15 

0.170 

0.167 

0.164 

0.161 

0.158 

0.156 

0.153 

0.150 

0.147 

0.144 

0.142 

0.139 

16 

.181 

.178 

•175 

.172 

.169 

.166 

.163 

.100 

•157 

•154 

•151 

.148 

17 

.192 

.189 

.186 

.183 

.180 

.177 

•173 

.170 

.167 

.164 

.l6l 

.158 

18 

.204 

.200 

.197 

.194 

.190 

.187 

.184 

.ISO 

.177 

.174 

.170 

.I67 

19 

.215 

.212 

.208 

.205 

.201 

.198 

.194 

.191 

.187 

.183 

.180 

.I76 

20 

0.227 

0.223 

0.219 

0.216 

0.212 

0.208 

0.204 

0.201 

0.197 

0.193 

0.190 

0.186 

21 

.238 

.234 

.230 

.226 

.223 

.219 

.215 

.211 

.207 

.203 

.199 

•195 

22 

.250 

.246 

.242 

.237 

•233 

.229 

.225 

.221 

.217 

.213 

.209 

.205 

23 

.261 

•257 

•  253 

.248 

.244 

.240 

.236 

.231 

.227 

.223 

.218 

.214 

24 

.273 

.268 

.264 

•259 

•255 

.250 

.246 

.241 

•237 

•233 

.228 

.224 

25 

0.284 

0.280 

0.275 

0.270 

0.266 

0.26l 

0.256 

0.252 

0.247 

0.242 

0.238 

0.233 

26 

.296 

.291 

.286 

.281 

.277 

.272 

.267 

.262 

•257 

.252 

•247 

.243 

27 

.307 

.302 

.297 

.292 

.287 

.282 

.277 

.272 

.267 

.262 

.257 

.252 

28 

•319 

.314 

•309 

•303 

.298 

•293 

.288 

.282 

.277 

.272 

.267 

.261 

29 

•331 

.325 

.320 

.314 

•309 

.304 

.298 

•293 

.287 

.282 

.276 

.271 

30 

0.342 

0-337 

o.33i 

0.325 

0.320 

0.314 

0.309 

0.303 

0.297 

0.292 

0.286 

0.281 

31 

•354 

.348 

•342 

.336 

.331 

.325 

.319 

.313 

.307 

.302 

.296 

.290 

32 

.365 

•359 

•354 

•348 

.342 

.336 

.330 

.324 

.318 

.312 

.306 

.300 

33 

•377 

•371 

.365 

•359 

•352 

.346 

•340 

•334 

.328 

.322 

.315 

.309 

34 

•389 

.382 

•376 

•370 

.363 

•357 

•351 

•344 

.338 

•331 

.325 

.319 

35 

0.401 

0.394 

0.387 

0.381 

0.374 

0.368 

0.361 

0-355 

0.348 

0.341 

0-335 

0.328 

36 

.412 

•405 

•399 

•392 

.385 

.378 

•372 

.365 

.358 

•351 

•345 

.338 

37 

.424 

.417 

.410 

.403 

.396 

•389 

.382 

•375 

.368 

.361 

•354 

•  347 

38 

436 

.428 

.421 

.414 

.407 

.400 

•393 

.386 

•379 

•371 

•364 

•357 

39 

•447 

.440 

•433 

•425 

.418 

.411 

.403 

.396 

.389 

.381 

•374 

.367 

40 

0-459 

0.452 

0.444 

0-437 

0.429 

0.422 

0.414 

0.406 

0-399 

0.391 

0.384 

0.376 

SMITHSONIAN  TABLES. 


136 


TABLE  41, 
REDUCTION    OF    PSYCHROMETRIC    OBSERVATIONS 

ENGLISH    MEASURES. 
Values    of  O.O00367  B  (t-t,)(l  +  ^j)- 

B  =  Barometric  pressure. 

t  =  Temperature  of  the  dry-bulb  thermometer. 
t^  =  Temperature  of  the  wet-bulb  thermometer. 


BAROMETRIC  PRESSURE  IN  INCHES   (B). 

t—t, 

24.5 

24.0 

235 

23.0 

22.5 

22.0 

21.5 

21.0 

20.5 

20.0 

19  5 

19.0 

18.5 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

l° 

0.009 

0.009 

0.009 

0.008 

O.OOS 

0.008 

O.OOS 

0.008 

0.008 

0.007 

0.007 

0.007 

0.007 

2 

.018 

.018 

.017 

.017 

.016 

.016 

.Ol6 

.015 

.015 

.015 

.014 

.014 

.014 

3 

.028 

.026 

.026 

.025 

.025 

.024 

.024 

.023 

.023 

.022 

.021 

.0'2I 

.O2O 

4 

.036 

•035 

•035 

•034 

•033 

.032 

.032 

•031 

.030 

.029 

.029 

.028 

.027 

5 

0.045 

0.044 

0.043 

0.042 

0.041 

0.040 

0.040 

0.039 

0.038 

0.037 

0.036 

0.035 

0.034 

6 

•054 

•053 

.052 

.051 

.050 

.049 

.048 

.046 

•045 

.044 

•043 

.042 

.041 

7 

-063 

.062 

.061 

•059 

.058 

•057 

•055 

•054 

•053 

.052 

.050 

•049 

.048 

8 

.072 

.071 

.070 

.068 

.066 

.065 

.063 

.062 

.060 

•059 

•057 

•056 

•055 

9 

.081 

.080 

.078 

.076 

•075 

•073 

.071 

.070 

.068 

.066 

.064 

.063 

.061 

10 

0.090 

0.089 

0.087 

0.085 

0.083 

0.081 

0.079 

0.077 

0.076 

0.074 

0.072 

0.070 

0.068 

ii 

.IOO 

.097 

•095 

•093 

.091 

.089 

.087 

.085 

•083 

.081 

.079 

.077 

•075 

12 

.109 

.106 

.104 

.102 

.IOO 

.097 

•095 

.093 

.091 

.089 

.086 

.084 

.082 

13 

.118 

•US 

•113 

.110 

.108 

.106 

.103 

.101 

.098 

.096 

•093 

.091 

.089 

14 

.127 

.124 

.122 

.119 

.117 

.114 

.III 

.109 

.106 

.104 

.IOI 

.098 

•095 

15 

0.136 

0.133 

O.I3I 

0.128 

0.125 

O.I22 

0.119 

0.117 

O.II4 

O.I  1  1 

0.108 

0.105 

0.102 

16 

•145 

.142 

•139 

.136 

•133 

.130 

.127 

.124 

.121 

.118 

.116 

•113 

.IIO 

17 

•155 

.151 

.148 

•145 

.142 

•139 

•135 

.132 

.129 

.126 

.123 

.I2O 

.117 

18 

.164 

.160 

•157 

•154 

•151 

.147 

•143 

.140 

•137 

•134 

.130 

.127 

.124 

19 

•173 

.169 

.166 

.162 

•J59 

•155 

.152 

.148 

.144 

.141 

.137 

•134 

•131 

20 

0.182 

0.178 

0.175 

O.I7I 

0.167 

0.163 

O.I  60 

0.156 

0.152 

0.148 

0.144 

O.I4I 

0.137 

21 

.191 

.187 

.183 

.ISO 

.176 

.172 

.168 

.164 

.160 

.156 

.152 

.148 

.144 

22 

.201 

.196 

.192 

.188 

.184 

.ISO 

.176 

.172 

.168 

.164 

.160 

•155 

•151 

23 

.2IO 

.205 

.201 

.197 

•193 

.188 

.184 

.180 

•175 

.171 

.I67 

•I63 

.158 

24 

.219 

.214 

.210 

.205 

.201 

.196 

.192 

.188 

•I83 

.179 

.174 

.170 

.165 

25 

0.228 

0.223 

0.2T9 

0.2JL4 

O.2IO 

0.205 

O.2OO 

0.196 

O.I9I 

0.186 

0.181 

0.177 

0.172 

26 

.238 

•233 

.228 

.223 

.218 

.213 

.208 

.203 

.199 

.194 

.!89 

.184 

.179 

27 

.247 

.242 

•237 

.232 

.227 

.222 

.216 

.211 

.206 

.201 

.196 

.191 

.186 

28 

.256 

.251 

•245 

.240 

•235 

.230 

.225 

.219 

.214 

.209 

.203 

.198 

•193 

29 

.266 

.260 

•254 

•249 

•244 

•238 

•233 

.227 

.222 

.216 

.211 

.206 

.200 

30 

0.275 

0.269 

0.263 

0.258 

0.252 

0.247 

O.24I 

0.235 

0.230 

0.224 

0.218 

0.213 

0.207 

31 

.284 

.278 

.272 

.267 

.261 

•255 

.249 

•243 

.238 

.232 

.226 

.220 

.214 

32 

.294 

.287 

.281 

•275 

.269 

.263 

•257 

.251 

•245 

•239 

•233 

.227 

.221 

33 

.303 

.296 

.290 

.284 

.278 

.272 

.266 

•259 

•253 

.247 

.241 

•235 

.229 

34 

.312 

.306 

.299 

•293 

.286 

.280 

.274 

.267 

.261 

•255 

.248 

.242 

.236 

35 

0.322 

0-3I5 

0.308 

0.302 

0.295 

0.289 

0.282 

0.275 

0.268 

0.262 

0.255 

0.249 

0.243 

36 

•331 

•324 

.317 

•3" 

•304 

.297 

.290 

.284 

.277 

.270 

.263 

•257 

.250 

37 

•341 

•333 

.326 

•319 

.312 

•305 

.299 

.292 

.285 

.278 

.271 

.264 

•257 

38 

•350 

•342 

•335 

•328 

•321 

•314 

.307 

.300 

•293 

.285 

.278 

.271 

.264 

39 

•359 

•352 

•344 

•337 

•330 

.322 

•315 

.308 

.300 

•293 

.285 

.278 

.271 

40 

0.369 

0.361 

0-353 

0.346 

0.338 

0.331 

0.323 

0.316 

0.308 

0.301 

0.293 

0.286 

0.278 

SMITHSONIAN  TABLES. 


137 


TABLE  42. 


RELATIVE    HUMIDITY. 

TEMPERATURES    FAHRENHEIT. 


Air 
tern- 

ure. 
t. 

DEPRESSION  OF  THE  DEW-POINT  (t  —  d}. 

0° 

0?5 

!» 

n 

2?0 

2?5 

3?0 

3?5 

4?0 

4?5 

5?0 

5?5 

6?0 

6?5 

7?0 

7?5 

F. 

-32° 

IOO 

97 

94 

92 

89 

-28 

IOO 

97 

94 

92 

89 

86 

83 

81 

78 

75 

73 

71 

69 

67 

65 

63 

-24 

IOO 

97 

94 

92 

89 

87 

84 

81 

79 

76 

74 

72 

70 

67 

65 

63 

-20 

IOO 

97 

94 

92 

89 

87 

84 

82 

79 

77 

75 

73 

7i 

69 

66 

65 

-16 

IOO 

97 

94 

92 

9° 

87 

85 

82 

80 

78 

75 

73 

71 

69 

67 

65 

—12 

IOO 

97 

95 

92 

90 

87 

85 

82 

80 

78 

75 

73 

71 

69 

67 

65 

-  8 

IOO 

97 

95 

92 

90 

87 

85 

83 

80 

78 

76 

74 

72 

70 

68 

66 

-  4 

IOO 

97 

95 

92 

90 

87 

85 

83 

80 

78 

76 

74 

72 

70 

68 

66 

0 

IOO 

97 

95 

92 

9° 

87 

85 

83 

80 

78 

76 

74 

72 

70 

68 

66 

+  4 

IOO 

98 

95 

93 

90 

88 

86 

84 

82 

80 

78 

76 

74 

70 

68 

8 

IOO 

98 

95 

93 

90 

88 

86 

84 

82 

80 

78 

76 

74 

72 

69 

12 

IOO 

98 

95 

93 

90 

88 

86 

84 

82 

80 

78 

76 

74 

72 

71 

69 

16 

IOO 

98 

95 

93 

89 

86 

84 

82 

80 

78 

76 

74 

72 

7i 

69 

20 

IOO 

98 

95 

93 

9i 

89 

87 

85 

83 

81 

79 

77 

75 

73 

72 

70 

24 

IOO 

98 

95 

93 

91 

89 

87 

85 

83 

81 

79 

77 

75 

73 

72 

70 

28 

IOO 

98^ 

95 

93 

91 

89 

87 

85 

83 

81 

79 

77 

76 

74 

72 

70 

32 

IOO 

98 

96 

94 

92 

90 

87 

85 

83 

81 

79 

76 

74 

72 

71 

36 

IOO 

98 

96 

94 

92 

91 

89 

87 

85 

83 

81 

80 

78 

76 

74 

73 

40 

IOO 

98 

96 

94 

93 

91 

89 

87 

86 

84 

82 

81 

79 

78 

76 

74 

44 

IOO 

98 

96 

94 

93 

91 

89 

87 

86 

84 

83 

81 

79 

78 

76 

75 

48 

IOO 

98 

96 

95 

93 

91- 

89 

88 

86 

84 

83 

81 

80 

78 

77 

75 

52 

IOO 

98 

96 

95 

93" 

9*' 

89 

88 

86 

85 

83 

82 

80 

79 

77 

76 

56 

IOO 

98 

96 

95 

93 

90 

88 

86 

85 

83 

82 

80 

79 

77 

76 

60 

IOO 

98 

97 

95 

93 

91 

9° 

88 

87 

85 

84 

82 

81 

79 

78 

76 

64 

IOO 

98 

97 

95 

93 

92 

90 

88  * 

87 

85 

84 

82 

81 

79 

78 

77 

68 

IOO 

98 

97 

95 

93 

92 

90 

89 

87 

86 

84 

83 

81 

80 

78 

77 

72 

IOO 

98 

97 

95 

93 

92 

90 

89 

87 

86 

84 

83 

81 

80 

79 

77 

76 

IOO 

98 

97 

95 

94 

92 

90 

89 

87 

86 

85 

83 

82 

80 

79 

77 

80 

IOO 

98 

97 

95 

94 

92 

91 

89 

88 

86 

85 

83 

82 

81 

79 

78 

84 

IOO 

98 

97 

95 

94 

92 

91 

89 

88 

86 

85 

84 

82 

81 

80 

78 

88 

IOO 

98 

97 

95 

94 

92 

91 

89 

88 

87 

85 

84 

83 

81 

80 

79 

<*  92 

IOO 

98 

97 

95 

94 

92 

91 

9° 

88 

B7 

85 

84 

83 

81 

80 

79 

I- 

IOO 

98 

97 

95 

94 

93 

90 

88 

86 

84 

83 

82 

80 

79 

too 

IOO 

99 

97 

96 

94 

93 

9i 

9° 

89 

87 

86 

85 

83 

82 

81 

79 

104 

IOO 

99 

97 

96 

94 

93 

91 

9° 

89 

87 

86 

85 

83 

82 

81 

80 

108 

IOO 

99 

97 

96 

94 

93 

92 

9° 

89 

88 

86 

85 

84 

82 

81 

80 

112 

IOO 

99 

97 

96 

94 

93 

92 

90 

89 

88 

86 

85 

84 

83 

82 

80 

116 

IOO 

99 

97 

96 

94 

93 

92 

90 

89 

88 

87 

85 

84 

83 

82 

81 

120 

IOO 

"99 

97 

96 

95 

93 

92 

9< 

89 

88 

87 

86 

84 

83 

82 

81 

SMITHSONIAN  TABLES. 


138 


TABLE  42 


RELATIVE    HUMIDITY. 

TEMPERATURES    FAHRENHEIT. 


Air 
Temper- 
ature. 
t. 

DEPRESSION  OF  THE  DEW-POINT  (t  —  d). 

8?0 

8?5 

9?0 

9?5 

10:0 

I0?5 

MO 

ll?5 

I2?0 

I2?5 

I3?0 

I3?5 

I4?0 

I4?5 

I5?0 

F. 

-24° 

61 

60 

58 

56 

5¥ 

53 

51 

50 

49 

-20 

62 

61 

59 

57 

55 

53 

52 

50 

49 

47 

46 

45 

43 

42 

4i 

-16 

63 

61 

59 

58 

56 

54 

53 

5i 

49 

48 

46 

45 

44 

42 

4i 

—  12 

63 

61 

60 

58 

56 

55 

53 

52 

50 

49 

47 

46 

45 

43 

42 

-  8 

64 

62 

61 

59 

57 

56 

54 

52 

5i 

49 

48 

47 

45 

44 

43 

-  4 

65 

63 

61 

60 

58 

56 

55 

53 

52 

50 

49 

47 

46 

-45 

43 

0 

65 

63 

61 

60 

58 

57 

55 

53 

52 

5i 

49 

48 

47 

45 

44 

+  4 

66 

64 

62 

61 

59 

57 

56 

54 

52 

5i 

50 

49 

48 

46 

45 

8 

67 

65 

64 

62 

60 

59 

57 

55 

54 

52 

5i 

50 

48 

47 

46 

12 

67 

65 

64 

62 

61 

59 

58 

56 

55 

53 

52' 

5i 

49 

48 

47 

16 

67 

65 

64 

62 

61 

60 

58 

56 

55 

54 

52 

5i 

50 

49 

47 

20 

68 

66 

65 

63 

61 

60 

58 

57 

56 

54 

53 

5i 

50 

49 

48 

24 

68 

67 

65 

64 

62 

61 

59 

58 

56 

55 

54 

52 

5i 

50 

48 

28 

69 

67 

65 

64 

62 

61 

59 

58 

57 

55 

54 

53 

52 

50 

49 

32 

69 

68 

66 

64 

63 

61 

60 

58 

57 

56 

54 

53 

52 

5i 

50 

36 

7i 

69 

68 

66 

65 

63 

62 

60 

59 

58 

56 

55 

54 

52 

5i 

40 

73 

7i 

70 

68 

67 

65 

64 

62 

61 

59 

58 

57 

55 

54 

53 

44 

73 

72 

7i 

69 

68 

66 

65 

64 

63 

61 

60 

58 

57 

56 

55 

48 

74 

72 

7i 

70 

68 

67 

66 

64 

63 

62 

61 

59 

58 

57 

56 

52 

74 

73 

7i 

70 

69 

67 

66 

65 

64 

62 

61 

60 

59 

58 

57 

56 

75 

73 

72 

70 

69 

68 

67 

65 

64 

63 

62 

61 

59 

58 

57 

60 

75 

74 

72 

7i 

70 

68 

67 

66 

65 

63 

62 

61 

60 

59 

58 

64 

75. 

74 

73 

7i 

70 

69 

68 

66 

65 

64 

63 

62 

60 

59 

58 

68 

7? 

74 

73 

72 

70 

69 

68 

67 

66 

64 

63 

62 

61 

60 

59 

72 

76 

75 

73 

72 

7i 

70 

68 

67 

66 

65 

64 

63 

61 

60 

59 

76 

76 

75 

74 

72 

7i 

70 

69 

68 

66 

65 

64 

63 

62 

61 

60 

80 

77 

75 

74 

73 

72 

70 

69 

68 

67 

66 

65 

64 

62 

61 

60 

84 

77 

76 

74 

73 

72 

7i 

70 

68 

67 

66 

65 

64 

63 

62 

61 

88 

77 

76 

75 

74 

72 

7i 

70 

69 

68 

67 

66 

64 

63 

62 

61 

92 

78 

76 

75 

74 

73 

72 

70 

69 

68 

67 

66 

65 

64 

63 

62 

96 

78 

77 

75 

74 

73 

72 

7i 

70 

69 

67 

66 

65 

64 

63 

62 

100 

78 

77 

76 

75 

73 

72 

7i 

70 

69 

68 

67 

66 

65 

64 

63 

104 

79 

77 

76 

75 

74 

73 

72 

70 

69 

68 

67 

66 

65 

64 

63 

108 

79 

78 

76 

75 

74 

73 

72 

7i 

70 

69 

68 

67 

66 

65 

64 

112 

79 

78 

77 

76 

75 

73 

72 

7i 

70 

69 

68 

67 

66 

65 

64 

116 

79 

78 

77 

76 

75 

74 

73 

72 

7i 

70 

69 

67 

66 

65 

65 

120 

80 

79 

-77 

76 

75 

74 

73 

72* 

7i 

70 

69 

68 

67 

66 

65 

SMITHSONIAN  TABLES. 


139 


TABLE  42. 


RELATIVE    HUMIDITY. 

TEMPERATURES    FAHRENHEIT. 


Air 

Temper 
ature. 
/. 

DEPRESSION  OF  THE  DEW-POINT  (t  —  d). 

15° 

16° 

17° 

18° 

19° 

20° 

2|o 

22° 

23° 

24° 

25° 

26° 

27° 

28° 

29° 

30° 

F. 

-20° 

4i 

39 

-16 

41 

39 

36 

34 

32 

3i 

29 

—  12 

42 

39 

37 

35 

33 

3i 

29 

27 

26 

24 

23 

22 

21 

-  8 

43 

40 

38 

36 

34 

32 

30 

28 

26 

25 

23 

22 

21 

20 

19 

18 

-  4 

43 

4i 

39 

36 

34 

32 

3i 

29 

27 

25 

24 

23 

21 

20 

19 

18 

0 

44 

42 

39 

37 

35 

33 

3i 

29 

28 

26 

25 

23 

22 

21 

19 

18 

+  4 

45 

43 

40 

38 

36 

34 

32 

30 

29 

27 

25 

24 

23 

21 

20 

19 

8 

46 

43 

4i 

39 

37 

35 

33 

3i 

30 

28 

26 

25 

23 

22 

21 

20 

12 

47 

44 

42 

39 

37 

35 

34 

32 

30 

28 

27 

25 

24 

23 

21 

20 

16 

47 

45 

43 

40 

38 

36 

34 

32 

3i 

29 

28 

26 

25 

23 

22 

21 

20 

48 

46 

43 

4i 

39 

37 

35 

33 

32 

30 

28 

27 

25 

24 

23 

22 

24 

48 

46 

44 

42 

40 

38 

36 

34 

32 

3i 

29 

28 

26 

25 

23 

22 

28 

49 

47 

44 

42 

40 

38 

36 

34 

33 

3i 

30 

28 

27 

26 

24 

23 

32 

50 

47 

45 

43 

4i 

39 

37 

35 

33 

32 

30 

29 

27 

26 

25 

24 

36 

5i 

49 

46 

44 

42 

40 

38 

37 

35 

33 

32 

30 

28 

27 

26 

25 

40 

53 

50 

48 

46 

44 

42 

40 

38 

36 

34 

33 

31 

30 

28 

27 

26 

44 

55 

52 

50 

48 

45 

43 

4i 

39 

38 

36 

34 

32 

31 

30 

28 

27 

48 

56 

54 

5i 

49 

47 

45 

43 

4i 

39 

37 

35 

34 

32 

31 

29 

28 

52 

57 

54 

52 

50 

48 

46 

44 

42 

4i 

39 

37 

35 

34 

32 

31 

29 

56 

57 

55 

53 

51 

49 

47 

45 

43 

42 

40 

38 

37 

35 

33 

32 

30 

60 

58 

56 

54 

51 

50 

48 

46 

44 

42 

4i 

39 

38 

36 

35 

33 

32 

64 

58 

56 

54 

52 

50 

48 

46 

45 

43 

4i 

40 

38 

37 

35 

34 

33 

68 

59 

57 

55 

53 

5i 

49 

47 

45 

44 

42 

40 

39 

37 

36 

35 

33 

72 

59 

57 

55 

53 

5i 

49 

48 

46 

44 

43 

4i 

40 

38 

37 

35 

34 

76 

60 

58 

56 

54 

52 

50 

48 

47 

45 

43 

42 

40 

39 

37 

36 

35 

80 

60 

58 

56 

54 

52 

5i 

49 

47 

45 

44 

42 

4i 

39 

38 

37 

35 

84 

61 

59 

57 

55 

53 

5i 

49 

48 

46 

44 

43 

41 

40 

39 

37 

36 

88 

61 

59 

57 

55 

54 

52 

50 

48 

47 

45 

43 

42 

4i 

39 

38 

36 

92 

62 

60 

58 

56 

54 

52 

5i 

49 

47 

46 

44 

43 

4i 

40 

38 

37 

96 

62 

60 

58 

56 

55 

53 

5i 

49 

48 

46 

45 

43 

42 

40 

39 

38 

100 

63 

61 

59 

57 

55 

53 

52 

50 

48 

47 

45 

44 

42 

4i 

40 

38 

104 

63 

61 

59 

57 

56 

54 

52 

50 

49 

47 

46 

44 

43 

4i 

40 

39 

108 

64 

62 

60 

58 

56 

54 

53 

5i 

49 

48 

46 

45 

43 

42 

41 

39 

112 

64 

62 

60 

58 

57 

55 

53 

52 

50 

48 

47 

45 

44 

43 

4i 

40 

116 

65 

63 

61 

59 

57 

55 

54 

52 

5« 

49 

48 

46 

45 

43 

42 

4i 

120 

65 

63 

61 

59 

58 

56 

54 

53 

5i 

50 

48 

47 

45 

44 

42 

41 

SMITHSONIAN  TABLES. 


140 


TABLE  42. 


RELATIVE    HUMIDITY. 

TEMPERATURES    FAHRENHEIT. 


Air 
Temper 

ature, 

t. 

DEPRESSION  OF  THE  DEW-POINT  (t  —  (T). 

33° 

36° 

39° 

42° 

45° 

48° 

51° 

54° 

57° 

60° 

63° 

66° 

69° 

72° 

75° 

F. 

-4 

15 

*3 

0 

15 

13 

ii 

+  4 

16 

13 

ii 

9 

8 

8 

17 

14 

ii 

10 

8 

7 

12 

17 

14 

12 

10 

8 

7 

6 

16 

18 

15 

12 

10 

9 

7 

6 

5 

4 

20 

18 

15 

13 

ii 

9 

8 

6 

5 

4 

4 

24 

19 

16 

14 

ii 

10 

8 

7 

6 

5 

4 

3 

28 

*9 

16 

14 

12 

10 

8 

7 

6 

5 

4 

3 

3 

32 

20 

17 

14 

12 

10 

9 

7 

6 

5 

4 

4 

3 

3 

2 

36 

21 

18 

15 

13 

ii 

9 

8 

7 

6 

5 

4 

3 

3 

2 

2 

40 

22 

!9 

16 

14 

12 

10 

9 

7 

6 

5 

4 

4 

3 

2 

2 

44 

23 

20 

17 

15 

.J3 

ii 

9 

8 

7 

6 

5 

4 

3 

3 

2 

48 

24 

21 

18 

15 

13 

ii 

10 

8 

7 

6 

5 

4 

4 

3 

2 

52 

25 

22 

!9 

16 

14 

12 

10 

9 

8 

6 

5 

5 

4 

3 

3 

56 

26 

23 

20 

17 

15 

13 

ii 

9 

8 

7 

6 

5 

4 

4 

3 

60 

28 

24 

21 

18 

16 

13 

12 

10 

9 

7 

6 

5 

5 

4 

3 

64 

29 

25 

22 

!9 

16 

14 

12 

ii 

9 

8 

7 

6 

5 

4 

4 

68 

30 

26 

23 

20 

17 

15 

13 

ii 

10 

8 

7 

6 

5 

5 

4 

72 

30 

27 

24 

21 

18 

16 

14 

12 

10 

9 

8 

7 

6 

5 

4 

76 

31 

28 

24 

22 

19 

17 

15 

13 

ii 

9 

8 

7 

6 

5 

4 

80 

31 

28 

25 

22 

20 

18 

15 

13 

12 

10 

9 

8 

7 

6 

5 

84 

32 

29 

26 

23 

20 

18 

16 

14 

12 

ii 

9 

8 

7 

6 

5 

88 

33 

29 

26 

23 

21 

19 

17 

15 

13 

ii 

10 

9 

8 

7 

6 

92 

33 

30 

27 

24 

21 

19 

17 

15 

14 

12 

10 

9 

8 

7 

6 

96 

34 

30 

27 

25 

22 

20 

18 

16 

14 

12 

ii 

10 

8 

7 

6 

100 

34 

31 

28 

25 

23 

2O 

18 

16 

14 

13 

ii 

10 

9 

8 

7 

104 

35 

32 

29 

26 

23 

21 

19 

17 

15 

13 

12 

ii 

9 

8 

7 

108 

36 

32 

29 

26 

24 

21 

19 

17 

15 

14 

12 

ii 

10 

9 

8 

112 

36 

33 

30 

27 

24 

22 

20 

18 

16 

14 

13 

ii 

10 

9 

8 

116 

37 

33 

30 

27 

25 

22 

20 

18 

16 

15 

13 

12 

ii 

9 

8 

120 

37 

34 

31 

28 

.25 

23 

21 

19 

17 

15 

14 

12 

ii 

10 

9 

SMITHSONIAN  TABLES. 


TABLE  43. 

REDUCTION 


OF    PSYCHROMETRIC    OBSERVATIONS. 

METRIC    MEASURES. 
Pressure    of  Aqueous   Vapor. 

(Brock.} 


Tempera- 
ture. 

0° 

1° 

2° 

3° 

4° 

5° 

6° 

7° 

8° 

9° 

C. 

inm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

ram. 

mm. 

mm. 

-30° 

0.38 

0-35 

0.32 

0.29 

0.26 

0.23 

O.2I 

0.19 

0.17 

0.15 

—  20 

0.94 

0.87 

0.79 

0-73 

0.66 

0.61 

0-55 

0.50 

0.46 

0.42 

—  10 

2.15 

1.99 

1.84 

1.69 

1.56 

1.44 

1.32 

1.22 

1.  12 

1.03 

—     0 

4-57 

4.25 

3-95 

3.67 

3-41 

3-i6 

2-93 

2.72 

2-51 

2.33 

Tempera- 
ture. 

0?0 

0?l 

0?2 

0?3 

0?4 

0?5 

0?6 

0?7 

0?8 

0?9 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

+  0° 

4-57 

4.60 

4.64 

4.67 

4.70 

4-74 

4-77 

4.80 

4.84 

4.87 

i 

4.91 

4-94 

4.98 

5.02 

5-05 

5-09 

5.12 

5.16 

5-20 

5.23 

2 

5-27 

5-31 

5-35 

5-39 

5-42 

5.46 

5-50 

5-54 

5.58 

5-62 

3 

5-66 

5.70 

5.74 

5.78 

5-82 

5-86 

5-9° 

5-94 

5-99 

6.03 

4 

6.07 

6.ii 

6.15 

6.20 

6.24 

6.28 

6-33 

6-37 

6.42 

6.46 

5 

6.51 

6.55 

6.60 

6.64 

6.69 

6-74 

6.78 

6.83 

6.88 

6.92 

6 

6.97 

7.02 

7.07 

7.12 

7.17 

7.22 

7.26 

7.3i 

7.36 

7-42 

7 

7-47 

7-52 

7-57 

7.62 

7-67 

7-72 

7.78 

7-83 

7.88 

7-94 

8 

7-99 

8.05 

8.10 

8.15 

8.21 

8.27 

8.32 

8.38 

8.43 

8.49 

9 

8-55 

8.61 

8.66 

8.72 

8.78 

8.84 

8.90 

8.96 

9.02 

9.08 

10 

9.14 

9.20 

9.26 

9-32 

9-39 

9>45 

9.5i 

9-58 

9.64 

9.70 

ii 

9-77 

9-83 

9.90 

9.96 

10.03 

10.09 

10.  16 

10.23 

10.30 

10.36 

12 

10.43 

10.50 

10.57 

10.64 

10.71 

10.78 

10.85 

10.92 

10.99 

11.07 

13 

11.14 

II.  21 

11.28 

11.36 

H-43 

11.50 

11.58 

11.66 

11-73 

ii.  81 

14 

11.88 

11.96 

12.04 

12.12 

12.19 

12.27 

12.35 

12.43 

12.51 

12.59 

15 

12.67 

12.76 

12.84 

12.92 

13.00 

13.09 

13.17 

13-25 

13-34 

13.42 

16 

13-51 

13.60 

13.68 

13.77 

13.86 

13-95 

14.04 

14.12 

14.21 

14.30 

17 

14.40 

14.49 

14.58 

14.67 

14.76 

14.86 

14-95 

15.04 

15-14 

15.23 

18 

15.33 

15-43 

15.52 

15.62 

15-72 

15-82 

15.92 

16.02 

16.12 

16.22 

19 

16.32 

16.42 

16.52 

16.63 

16.73 

16.83 

16.94 

17.04 

17.15 

17.26 

20 

17.36 

17-47 

17.58 

17.69 

17.80 

17.91 

18.02 

18.13 

18.24 

18.35 

21 

18.47 

18.58 

18.69 

18.81 

18.92 

19.04 

19.16 

19.27 

19.39 

19.51 

22 

19.63 

19.75 

19.87 

19.99 

20.11 

20.24 

20.36 

20.48 

20.61 

20.73 

23 

20.86 

20.98 

21.  II 

21.24 

21.37 

21.50 

21.63 

21.76 

21.89 

22.02 

24 

22.15 

22.29 

22.42 

22.55 

22.69 

22.83 

22.96 

23.10 

23.24 

23.38 

25 

23.52 

23.66 

23.80 

23.94 

24.08 

24.23 

24-37 

24.52 

24.66 

24.8l 

26 

24.96 

25.10 

25.25 

25.40 

25.55 

25.70 

25-86 

26.01 

26.16 

26.32 

27 

26.47 

26.63 

26.78 

26.94 

27.10 

27.26 

27.42 

27.58 

27.74 

27.90 

28 

28.07 

28.23 

28.39 

28.56 

28.73 

28.89 

29.06 

29-23 

29.40 

29-57 

29 

29.74 

29.92 

30.09 

30.26 

30.44 

30.62 

30.79 

30.97 

3LI5 

31.33 

30 

3I.5I 

31.69 

31.87 

32.06 

32.24 

32.43 

32.61 

32.80 

32.99 

33-18 

31 

33.37 

33.56 

33-75 

33-94 

34.14 

34-33 

34-53 

34.72 

34.92 

35-12 

32 

35-32 

35.52 

35-72 

35-92 

36.13 

36.33 

36.54 

36.74 

36.95 

37.16 

33 

37-37 

37.58 

37-79 

38.00 

38.22 

38.43 

38.65 

38.87 

39-oS 

39-30 

34 

39-52 

39.74 

39-97 

40.19 

40.41 

40.64 

40.87 

41.09 

41.32 

41-55 

35 

4L78 

42.02 

42.25 

42.48 

42.72 

42.96 

43.19 

43.43 

43.67 

43.92 

36 

44.i6 

44.40 

44.65 

44.89 

45.14 

45.39 

45.64 

45-89 

46.14 

46.39 

37 

46.65 

46.90 

47.i6 

4742 

47-68 

47.94 

48.20 

48.46 

48.73 

48.99 

38 

49.26 

49-53 

49-80 

50.07 

50.34 

50.61 

50.89 

51.16 

5L44 

5L72 

39 

52.00 

52.28 

52.56 

52.84 

53.13 

5341 

53-70 

53-99 

54.28 

54-57 

40 

54.87 

55.i6 

55.46 

55-75 

56.05 

56.35 

56.65 

56.95 

57-26 

57.56 

4i 

57.87 

58.18 

58.49 

58.80 

59.ii 

59-43 

59-74 

60.06 

60.38 

60.70 

42 

61.02 

6i.34 

61.66 

61.99 

62.32 

62.65 

62.98 

63-31 

63.64 

63.97 

43 

64.31 

64.65 

64.99 

65.33 

65.67 

66.01 

66.36 

66.71 

67.05 

67.41 

44 

67.76 

68.11 

68.47 

68.82 

69.18 

69.54 

69.90 

70.26 

70.63 

70.99 

45 

71.36 

71-73 

72.10 

72.48 

72.85 

73.23 

73.60 

73.98 

74.36 

74-75 

SMITHSONIAN  TABLES. 


142 


TABLE  44. 
REDUCTION    OF    PSYCHROMETRIC    OBSERVATIONS. 

METRIC    MEASURES. 
Values  of   0.000660  B  (t-t^l  +^|Y 

t  =  Temperature  of  the  dry-bulb  thermometer. 
/,  =  Temperature  of  the  wet-bulb  thermometer. 


/      / 

BAROMETRIC   PRESSURE   IN    MILLIMETRES    (B}. 

I     l^ 

770 

760 

750 

740 

730 

720 

710 

700 

690 

680 

670 

660 

650 

640 

630 

c. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

1° 

0.52 

0.51 

0.50 

0.50 

0.49 

0.48 

0.48 

0.47 

0.46 

0.46 

045 

0.44 

0.44 

043 

0.42 

2 

1.03 

I.OI 

1.  00 

0.98 

0.97 

0.96 

0.94 

0.93 

0.92 

0.90 

0.89 

0.88 

0.87 

0.85 

0.84 

3 

1-54 

1.52 

1.49 

1.47 

145 

143 

1.41 

1-39 

1.37 

1-35 

1-33 

1.32 

1.30 

1.28 

1.26 

4 

2.04 

2.02 

1.99 

1.97 

1.94 

I.9I 

1.89 

1.86 

1.83 

1.81 

1.78 

1.75 

1-73 

1.70 

1.67 

5 

2.56 

2.52 

2.49 

2.46 

243 

2-39 

2.36 

2.32 

2.29 

2.26 

2.23 

2.19 

2.17 

2.13 

2.09 

6 

3-07 

3-03 

2.99 

2-95 

2.91 

2.87 

2.83 

2-79 

2.75 

2.71 

2.67 

2.63 

2.59 

2-55 

2.51 

7 

3-59 

3-54 

3-50 

3-45 

340 

3.36 

3-31 

3-26 

3.22 

3-17 

3.12 

3-o8 

3-04 

2-99 

2.94 

8 

4.11 

4-05 

4.00 

3-95 

3.89 

3.84 

3-79 

3-73 

3-68 

3-63 

3.58 

3-53 

348 

342 

3.36 

9 

4.62 

4.56 

4.50 

4-44 

4.38 

4.32 

4.27 

4.21 

4-15 

4.09 

4.03 

3-97 

3-91 

3.85 

3-79 

10 

5-15 

5.08 

5-01 

4-94 

4.88 

4.81 

4-74 

4.68 

4.61 

4-54 

447 

44i 

4-35 

4.28 

4.21 

ii 

5.66 

5-59 

5-51 

544 

5-37 

5-30 

5-22 

5.15 

5-o8 

5.00 

4-93 

4.86 

4-79 

4.71 

4.63 

12 

6.IQ 

6.ii 

6.O2 

5-94 

5-86 

5.78 

5-70 

5-62 

5-54 

546 

5.38 

5-3° 

5.22 

5.14 

5.o6 

13 

6.71 

6.62 

6.53 

6-45 

6.36 

6.27 

6.18 

6.10 

6.01 

5-92 

5.83 

5-75 

5-66 

5-57 

549 

14 

7-23 

7.14 

7.05 

6-95 

6.86 

6.76 

6.67 

6.58 

6.48 

6-39 

6.29 

6.20 

6.ii 

6.01 

5-92 

15 

7-76 

7.66 

7.56 

7.46 

7.36 

7.26 

7.16 

7.06 

6-95 

6.85 

6-75 

6.65 

6.55 

6-45 

6.35 

16 

8.29 

8.18 

8.07 

7.96 

7.86 

7-75 

7.64 

7.54 

743 

7.32 

7.21 

7.11 

7.00 

6.89 

6.78 

17 

8.82 

8.70 

8.59 

8.47 

8.36 

8.24 

8.13 

8.02 

7.90 

7.79 

7-67 

7.56 

745 

7-33 

7.21 

18 

9-35 

9.22 

9.10 

8.98 

8.86 

8.74 

8.62 

8.50 

8-37 

8.25 

8.13 

8.01 

7.89 

7-77 

7.65 

19 

9.87 

9-75 

9.62 

949 

9-36 

9-23 

9.11 

8.98 

8.85 

8.72 

8-59 

8.47 

8-34 

8.21 

8.08 

20 

0.41 

10.27 

10.14 

IO.OO 

9.87 

9-73 

9.60 

946 

9.32 

9.19 

9.05 

8.92 

8.78 

8.65 

8.51 

/     / 

BAROMETRIC   PRESSURE   IN   MILLIMETRES    (B}. 

t     t^ 

620 

610 

600 

590 

580 

570 

560 

550 

540 

530 

520 

510 

500 

490 

480 

c. 
1° 

mm. 
0.42 

mm. 
0.41 

mm. 
0.40 

mm. 
0.40 

mm. 
0.39 

mm. 
0.38 

mm. 
0.38 

mm. 
0-37 

mm. 
0.36 

mm. 
0.36 

mm. 
o-35 

mm. 
0-34 

mm. 
0-34 

mm. 
0-33 

mm. 
0.32 

2 

0.82 

0.8  1 

0.8o 

0.78 

0.77 

0.76 

0.75 

0-73 

0.72 

0.70 

0.69 

0.68 

0.67 

0.65 

0.64 

3 

1.24 

1.22 

1.20 

I.I7 

I.I5 

I-I3 

1.  12 

1.  10 

1.  08 

1.  06 

1.04 

1.02 

1.  00 

0.98 

0.96 

4 

1.65 

1.62 

1.60 

1-57 

1-54 

I-5I 

1.49 

1.46 

1.44 

I.4I 

1.38 

1.36 

1-33 

1.30 

1.28 

5 

2.06 

2.03 

1.99 

1.96 

i-93 

1.90 

1.86 

1.83 

1.80 

1.76 

1-73 

1.70 

1.66 

1.63 

1.60 

6 

2.47 

2-43 

2-39 

2-35 

2.32 

2.28 

2.24 

2.20 

2.16 

2.12 

2.08 

2.04 

2.OO 

1.96 

1.92 

7 

2.89 

2.84 

2.80 

2-75 

2.71 

2.66 

2.61 

2.56 

2.52 

247 

243 

2.38 

2-33 

2.28 

2.24 

8 

3-31 

3-26 

3.20 

3-i5 

3.10 

3-04 

2-99 

2.94 

2.88 

2.83 

2.78 

2.72 

2.67 

2.62 

2.56 

9 

3-73 

3-67 

3-61 

3-55 

349 

343 

3-37 

3.31 

3.25 

3-19 

3-13 

3.06 

3.00 

2-94 

2.88 

10 

4.14 

4.07 

4.01 

3-94 

3.88 

3-8i 

3-74 

3-67 

3-6i 

3-54 

348 

341 

3.34 

3-27 

3-21 

ii 

4.56 

4-49 

442 

4-34 

4.27 

4.19 

4.12 

4-05 

3-97 

3-90 

3-83 

3-75 

3.68 

3.6o 

3-53 

12 

4.98 

4.90 

4.82 

4-74 

4.66 

4-58 

4-50 

442 

4-34 

4.26 

4.18 

4.10 

4.02 

3-93 

3.85 

13 

540 

5-31 

5-23 

5-14 

5-05 

4.96 

4.88 

479 

4.70 

4.62 

4-53 

444 

4.36 

4-27 

4.18 

14 

5.83 

5-73 

5.64 

5-54 

545 

5-35 

5-26 

5.17 

5.07 

4.98 

4.88 

4-79 

4.70 

4.60 

4-51 

15 

6.25 

6.15 

6.05 

5-95 

5-85 

5-74 

5-64 

5-54 

5-44 

5-34 

5-24 

5.14 

5-04 

4-94 

4.84 

16 

6.68 

6-57 

6.46 

6-35 

6.24 

6.14 

6.03 

5.92 

5.8i 

5-71 

5.6o 

549 

5.38 

5-27 

5.17 

17 

7.10 

6,98 

6.87 

6.75 

6.64 

6-53 

6.41 

6.30 

6.18 

6.07 

5-95 

5.84 

5.72 

5.6i 

5-50 

18 

7-52 

7.40 

7.28 

7.16 

7.04 

6.92 

6.80 

6.67 

6-55 

6-43 

6.31 

6.19 

6.07 

5.95 

5.83 

J9 

7-95 

7.82 

7.70 

7-57 

744 

7-31 

7.18 

7-05 

6-93 

6.80 

6.67 

6-54 

6.42 

6.29 

6.16 

20 

8.38 

8.24 

8.ii 

7-97 

7.84 

7.70 

7-57 

743 

7-30 

7.16 

7-03 

6.90 

6.76 

6.62 

6.49 

SMITHSONIAN  TABLES. 


143 


TABLE  45. 


RELATIVE    HUMIDITY. 

TEMPERATURE   CENTIGRADE. 


Depres- 
sion of  the 

dew-point. 

t  —  d. 

DEW-POINT  (d). 

-15° 

-10° 

-5° 

0° 

+  5° 

+  10° 

+  15° 

+  20° 

+  25° 

+  30° 

c. 

0?0 

100 

100 

100 

TOO 

IOO 

IOO 

IOO 

IOO 

IOO 

IOO 

O.2 

98 

98 

99 

99 

99 

99. 

*  99 

99 

<99 

99 

0.4 

97 

97 

97 

97 

97 

97  '- 

*97 

98 

•\)S 

98 

0.6 

95 

95 

96 

96 

96 

96 

96 

96 

97 

97 

0.8 

94 

94 

94 

94 

95 

95 

95 

95 

95 

96 

1.0 

92 

92 

93 

93 

93 

94 

94 

W~ 

:»V 

94 

1.2 

9i 

91 

91 

92 

92 

92 

93 

93 

93 

93 

1.4 

89 

90 

90 

90 

9i 

9i 

9i 

92 

92 

92 

1.6 

88 

88 

89 

89 

90 

91 

91 

9i 

1.8 

86 

87 

87 

88 

88 

89 

89 

90 

90 

90 

2.0 

85 

86 

86 

87 

87 

88 

88 

88 

89 

89 

2.2 

84 

84 

85 

85 

86 

S6 

87 

87 

88 

88 

2.4 

83 

83 

84 

84 

85 

85 

86 

86 

87 

87 

2.6 

82 

82 

82 

83 

84 

84 

85 

85 

86 

86 

2.8 

80 

80 

81 

82 

83 

83 

84 

84 

85 

85 

3.0 

78 

79 

80 

81 

81 

82 

83 

83 

84 

84 

3-2 

77 

78 

79 

80 

80 

81 

82 

82 

83 

83 

34 

76 

77 

78 

79 

79 

80 

81 

81 

82 

82 

3-6 

75 

76 

77 

77 

78 

79 

80 

80 

81 

82 

3.8 

74 

75 

75 

76 

77 

78 

79 

79 

80 

81 

4.0 

72 

73 

74 

75 

76 

77 

78 

78 

79 

80 

4.2 

7i 

72 

73 

74 

75 

76 

77 

77 

78 

79 

44 

70 

7i 

72 

73 

74 

75 

76 

77 

77 

78 

4.6 

69 

70 

7i 

72 

73 

74 

75 

76 

76 

77 

4.8 

68 

69 

70 

7i 

72 

73 

74 

75 

75 

76 

5.0 

67 

68 

69 

70 

7i 

72 

73 

74 

75 

75 

5-2 

66 

67 

68 

69 

70 

7i 

72 

73 

74 

75 

54 

65 

66 

67 

68 

69 

70 

7i 

72 

73 

74 

5-6 

64 

65 

66 

67 

68 

69 

70 

7i 

72 

73 

5-8 

63 

64 

65 

66 

68 

69 

69 

70 

7i 

72 

6.0 

62 

63 

64 

66 

67 

68 

69 

70 

70 

7i 

6.2 

61 

62 

63 

65 

66 

67 

68 

70 

7i 

6.4 

60 

61 

63 

64 

65 

66 

67 

68 

70 

6.6 

59 

60 

62 

63 

64 

65 

66 

67 

68 

69 

6.8 

58 

60 

61 

62 

63 

64 

65 

66 

67 

68 

7.0 

57 

59 

60 

61 

62 

63 

65 

66 

67 

68 

7.2 

56 

58 

59 

60 

62 

63 

64 

65 

66 

67 

74 

55 

57 

58 

60 

61 

62 

63 

64 

65 

66 

7.6 

55 

56 

57 

59 

60 

61 

62 

63 

64 

65 

7-8 

54 

55 

57 

58 

59 

60 

62 

63 

64 

65 

8.0 

53 

54 

56 

57 

58 

60 

61 

62 

63 

64 

SMITHSONIAN  TABLES. 


144 


TABLE  45 


RELATIVE    HUMIDITY. 

TEMPERATURE  CENTIGRADE. 


Depres- 
sion of  the 
dew-point. 

t  —  d. 

DEW-POINT  (d). 

-15° 

-10° 

-5° 

0° 

+  5° 

+  10° 

+  15° 

+  20° 

+  25° 

+  30° 

c. 

8?0 

53 

54 

56 

57 

58 

60 

61 

62 

63 

64 

8.2 

52 

54 

55 

56 

57 

59 

60 

61 

62 

63 

8.4 

51 

53 

54 

56 

57 

58 

59 

60 

62 

63 

8.6 

52 

54 

55 

56 

57 

58 

60 

61 

62 

8.8 

50 

53 

54 

55 

57 

58 

59 

60 

61 

9.0 

49 

5I 

52 

53 

55 

56 

57 

58 

60  . 

61 

9.2 

48 

50 

53 

54 

55 

57 

58 

59 

60 

9-4 

48 

49 

51 

52 

53 

55 

56 

57 

58 

59 

9.6 

47 

48 

50 

51 

53 

54 

55 

56 

58 

59 

9.8 

46 

48 

49 

51 

52 

53 

55 

56 

57 

58 

10.0 

46 

47 

49 

50 

$J 

53 

54 

55 

56 

57 

10.5 

44 

45 

47 

48 

50 

51 

52 

54 

55 

II.O 

42 

44 

45 

47 

48 

49 

51 

52 

53 

II-5 

41 

42 

44 

45 

-47 

48 

49 

51 

52 

12.0 

39 

4i 

42 

44 

45 

47 

48 

49 

50 

12.5 

38 

39 

41 

42 

44 

45 

46 

48 

49 

13.0 

36 

38 

40 

41 

43 

44 

45 

46 

48 

13-5 

35 

37 

38 

40 

42 

43 

44 

45 

46 

14.0 

34 

35 

37 

38 

40 

4i 

43 

44 

45 

U.5 

33 

34 

36 

37 

39 

40 

41 

43 

44 

15.0 

33 

35 

36 

37 

39 

40 

42 

15-5 

30 

32 

33 

35 

36 

38 

39 

40 

16.0 

29 

3i 

32 

34 

35 

37 

38 

39 

• 

16.5 

28 

30 

33 

34 

36 

37 

38 

17.0 

27 

29 

30 

32 

33 

35 

36 

37 

17-5 

26 

28 

29 

31 

32 

34 

35 

36 

18.0 

25 

27 

28 

30 

3i 

33 

34 

35 

18.5 

25 

26 

27 

29 

30 

32  , 

33 

34 

19.0 

24 

25 

27 

28 

29 

31 

32 

33 

19-5 

23 

24 

26 

27 

29 

30 

3i 

33 

20.0 

22 

24 

25 

26 

28 

29 

30 

32 

21.0 

21 

22 

23 

25 

26 

27 

29 

22.0 

19 

21 

22 

23 

25 

26 

27 

23.0 

18 

19 

21 

22 

23 

24 

26 

24.O 

17 

18 

19 

21 

22 

%  23 

24 

25.0 

16 

17 

18 

19 

21 

22 

23 

26.0 

15 

16 

17 

18 

20 

21 

27.0 

14 

15 

16 

17 

18 

20 

28.0 

13 

14 

15 

16 

17 

19 

29.0 

12 

13 

i4 

15 

16 

18 

30.0 

II 

12 

13 

14 

16 

17 

SMITHSONIAN  TABLES. 


TABLE  46. 


REDUCTION    OF    SNOWFALL    MEASUREMENTS. 


Depth   of  water   corresponding    to   the  weight   of   snow   (or   rain)   collected 

in    an    8-inch   gage. 


Weight 
of 
Snow. 

Oz. 
0 

Oz. 

1 
4 

Oz. 
1 
2 

Oz. 
3 
4 

Weight 
Snow. 

Oz. 
0 

Oz. 
1 
4 

Oz. 

1 
2 

Oz. 
3 
4 

Weight 
of 
Snow. 

Oz. 
0 

Oz. 

1 
4 

Oz. 

1 

2 

Oz. 
3 
4 

U>.0z. 

Inch. 

Inch. 

Inch. 

Inch. 

Ivb.Oz. 

Inch's 

Inch's 

Inch's 

Inch's 

U>.0z. 

Inch's 

Inch's 

Inch's 

Inch's 

0 

O.OO 

O.OI 

O.O2 

0.03 

8 

0.83 

0.83 

0.84 

0.85 

2  13 

1-55 

1.56 

1-57 

1-57 

i 

•03 

.04 

•05 

.06 

9 

.86 

.87 

.88 

•89 

2    14 

1.58 

!-59 

1.  60 

I.6i 

2 

.07 

.08 

.09 

.09 

10 

.89 

.90 

.91 

•92 

2    15 

1.62 

r63 

1.63 

1.64 

3 

,IO 

.11 

.12 

•13 

ii 

•93 

•94 

•94 

•95 

4 

.14 

•15 

•15 

.16 

12 

.96 

•97 

.98 

•99 

5 

0.17 

0.18 

0.19 

0.20 

13 

I.OO 

1.  01 

I.OI 

1.02 

3   0 

1.65 

1.66 

.67 

1.68 

6 

.21 

.22 

.22 

•23 

14 

1.03 

1.04 

1.05 

1.  06 

3    i 

1.69 

1.69 

.70 

1.71 

7 

.24 

•25 

.26 

.27 

15 

1.07 

1.08 

1.  08 

1.09 

3    2 

1.72 

i-73 

•74 

1-75 

8 

.28 

.28 

.29 

•30 

3    3 

i-75 

1-76 

•77 

1.78 

9 

•31 

•32 

•33 

•34 

3    4 

1-79 

i.  80 

.81 

1.81 

10 

0.34 

0.35 

0.36 

0-37 

2   0 

1.  10 

i.  ii 

1.  12 

1-13 

3    5 

1.82 

1.83 

1.84 

•85 

ii 

.38 

•39 

.40 

.41 

2      I 

1.14 

1.14 

I-I5 

1.16 

3    6 

1.86 

1.87 

1.87 

.88 

12 

41 

.42 

•43 

•44 

2      2 

1.17 

1.18 

I.I9 

i.  20 

3    7 

1.89 

1.90 

1.91 

.92 

13 

45 

.46 

.46 

•47 

2     3 

1.  20 

I.2I 

1.22 

1.23 

3    8 

i-93 

1.94 

1.94 

•95 

14 

.48 

•49 

•50 

•5i 

2     4 

1.24 

1-25 

1.26 

1.26 

3    9 

1.96 

1.97 

1.98 

•99 

15 

•52 

•52 

•53 

•54 

0 

0-55 

0.56 

o.57 

0.58 

2   5 

1.27 

1.28 

1.29 

1.30 

3  10 

2.00 

2.00 

2.OI 

2.  02 

I 

•58 

•59 

.60 

.61 

2     6 

1.31 

1.32 

1.32 

i-33 

3  i* 

2.03 

2.04 

2.05 

2.06 

2 

.62 

•63 

.64 

•65 

2    7 

i-34 

1-35 

1.36 

i-37 

3  12 

2.06 

2.07 

2.08 

2.09 

3 

•65^ 

.66 

•67 

.68 

2     8 

1.38 

1.38 

i-39 

1.40 

3  13 

2.IO 

2.  II 

2.12 

2.12 

4 

.69 

.70 

•7i 

•7i 

2    9 

1.41 

1.42 

i-43 

1.44 

3  14 

2.13 

2.14 

2.15 

2.16 

3  15 

2.17 

2.18 

2.18 

2.19 

5 

0.72 

0-73 

0.74 

0-75 

2  10 

1.44 

i-45 

1.46 

1.47 

6 

.76 

•77 

•77 

.78 

2    II 

1.48 

1.49 

1.50 

1-51 

4  0 

2.20 

7 

•79 

.80 

.81 

.82 

2    12 

1-51 

1-52 

i-53 

1-54 

5    o 

2-75 

TABLE   47. 

RATE    OF    DECREASE    OF   VAPOR    PRESSURE    WITH    ALTITUDE. 

(According  to  the  empirical  formula  of  Dr.  J.  Hann). 

Z=io-6^' 

Jo 

f,f0  =  Vapor  pressures  at  an  upper  and  a  lower  station  respectively. 
h  =  Difference  of  altitude  in  metres. 


Difference  of  Altitude. 

/ 

/o' 

Difference  of  Altitude. 

/ 

/o  ; 

Difference  of  Altitude. 

/ 
/o' 

metres. 

Feet. 

metres. 

Feet. 

metres. 

Feet. 

200 

656 

0-93 

1800 

5905 

0.53 

3400 

IH55 

0.30 

400 

1312 

2000 

6562 

•49 

3600 

IlSil 

.28 

600 

1968 

.81 

2200 

7218 

.46 

3800 

12467 

.26 

800 

2625 

•75 

2400 

7874 

•43 

4000 

13123 

•24 

1000 

3281 

0.70 

2600 

8530 

0.40 

4500 

14764 

O.2O 

1200 

3937 

.65 

2800 

9186 

•37 

5000 

16404 

•17 

1400 

4593 

.61 

3000 

9842 

•35 

5500 

18045 

.14 

1600 

5249 

•57 

3200 

10499 

•32 

6000 

19685 

.12 

SMITHSONIAN  TABLES. 


146 


OF  THK 

•"UNIVERSITY 


WIND    TABLES. 


Mean  direction  of  the  wind  by  Lambert's  formula  — 

Multiples  of  cos  45° ;  form  and  example  of  computation  .  TABLE  48 

Values  of  the  mean  direction  (a)  or  its  complement  (90  —  a)  49 

Synoptic  conversion  of  velocities     .     .     .     .     ....     .     .  TABLE  50 

Miles  per  hour  into  feet  per  second TABLE  51 

Feet  per  second  into  miles  per  hour TABLE  52 

Metres  per.  second  into  miles  per  hour TABLE  53 

Miles  per  hour  into  metres  per  second -     .  TABLE  54 

Metres  per  second  into  kilometres  per  hour TABLE  55 

Kilometres  per  hour  into  metres  per  second TABLE  56 

Beaufort  wind  scale  and  its  conversion  into  velocity      .     .     .  TABLE  57 


TABLE  48. 

MEAN    DIRECTION    OF   THE    WIND    BY   LAMBERT'S    FORMULA. 


_ 
- 


Multiples    of   cos  45°. 


Number. 

0 

. 

2 

3 

4 

5 

6 

7 

8 

9 

I 

0 

0.0 

0.7 

1.4 

2.1 

2.8 

3-5 

4.2 

4-9 

5-7 

6.4 

10 

7.1 

7-8 

8.5 

9.2 

9-9 

10.6 

"•3 

12.0 

12.7 

13-4 

20 

14.1 

14.8 

15.6 

I6.3 

17.0 

17.7 

18.4 

I9.I 

19.8 

20.5 

30 

21.2 

21.9 

22.6 

23.3 

24.0 

24.7 

25.5 

26.2 

26.9 

27.6 

40 

28.3 

29.0 

29.7 

30.4 

31-1 

31-8 

32.5 

33-2 

33-9 

34-6 

50 

35-4 

36.1 

36.8 

37.5 

38.2 

38.9 

39-6 

40.3 

41.0 

41.7 

60 

42.4 

43-1 

43.8 

44-5 

45-3 

46.0 

46.7 

47.4 

48.1 

48.8 

70 

49-5 

50.2 

50.9 

51-6 

52.3 

53-o 

53-7 

54.4 

55-2 

55-9 

80 

56.6 

57-3 

58.0 

58.7 

59.4 

60.  i 

60.8 

61.5 

62.2 

62.9 

90 

63.6 

64.3 

65.1 

65.8 

66.5 

67.2 

67.9 

68.6 

69-3 

70.0 

100 

70.7 

71.4 

72.1 

72.8 

73-5 

74.2 

75-0 

75-7 

76.4 

77.1 

no 

77.8 

78.5 

79.2 

79-9 

80.6 

81.3 

82.0 

82.7 

83.4 

84.1 

120 

84-9 

85.6 

86.3 

87.0 

87.7 

88.4 

89.1 

89.8 

9°-5 

91.2 

130 

91.9 

92.6 

93-3 

94.0 

94-8 

95-5 

96.2 

96.9 

97-6 

98.3 

140 

99.0 

99-7 

100.4 

IOI.I 

101.8 

102.5 

103.2 

103.9 

104.7 

105.4 

150 

106.1 

106.8 

107.5 

108.2 

108.9 

109.6 

110.3 

III.O 

111.7 

112.4 

160 

113.1 

113.8 

114.6 

II5-3 

116.0 

116.7 

117.4 

118.1 

118.8 

H9.5 

170 

1  20.  2 

120.9 

121.  6 

122.3 

123.0 

123.7 

124.5 

125.2 

125.9 

126.6 

180 

127.3 

128.0 

128.7 

129.4 

130.1 

130.8 

I3L5 

132.2 

132.9 

133.6 

190 

134.4 

I35-I 

135.8 

136.5 

137.2 

!37-9 

138.6 

139-3 

140.0 

140.7 

200 

141.4 

142.1 

142.8 

143.5 

144.2 

145.0 

145.7 

146.4 

147.1 

147.8 

Form  for  Computing  the  Numerator  and   Denominator. 


Directions. 

E 

W 

N 

5 

NE 

sw 

SE       NW 

Observed  values. 

7 

12 

6 

26 

13 

45 

2                24 

E-W 

N-S 

NE-SW 

SE-NW 

C      -5      ] 

[  -*>  ] 

[-32]x-45° 

[—  22]  x  £0545° 

Numerator  (w). 

[      —  5      ]                -f                 [    —22.6   ]  +  [    —15-6   ]  =  [—  43-2] 

Denominator  (of). 

[       —  20       ]    +    [     —  22.6     ]    —    £     —  15.6     ]  =  £—27.0] 

a  is  the  angle  between  the  mean  wind  direction  and  the  meridian. 
The  signs  of  the  numerator  (n)  and  denominator  (d)  determine  the  quadrant  in  which  a  lies. 

When    n    and    d    are    positive,  a  lies  between  N  and  E:  ~-  =  NE. 

When   n   is  positive  and  d  negative,  a  lies  between  S  and  E  :  ~  =  SE. 

When    n    and    d   are  negative,  a  lies  between  S  and  W:  —  =SW. 

When   n    is    negative    and   d  positive,  a  lies  between  N  and  W  :  ^~  =  NW. 

148 


TABLE  49, 

MEAN    DIRECTION    OF   THE    WIND    BY    LAMBERT'S    FORMULA. 
Values  of  the   mean   direction  (a)  or  its  complement  (90°— a). 
a  =  tan-*  n/d 


n 
or 
d. 

DENOMINATOR  OR  NUMERATOR  (d  OR  n). 

10 

15 

20 

25 

30 

35 

40 

45 

50 

55 

60 

65 

70 

75 

80 

85 

90 

95 

100 

/-o 

T  ° 

T  o 

_  o 

T  o 

T  o 

2 

o 
II 

4° 
8 

6 

5 

4 

3 

3 

3 

2 

2 

2 

2 

2 

2 

I 

I 

I 

I 

I 

I 

I 

I 

I 

I 

3 

17 

ii 

9 

7 

6 

5 

4 

4 

3 

3 

3 

3 

2 

2 

2 

2 

2 

2 

2 

4 

22 

15 

ii 

9 

8 

7 

6 

5 

5 

4 

4 

4 

3 

3 

3 

3 

3 

2 

2 

5 

27 

18 

14 

ii 

9 

8 

7 

6 

6 

5 

5 

4 

4 

4 

4 

3 

3 

3 

3 

6 

31 

22 

17 

13 

ii 

10 

9 

8 

7 

6 

6 

5 

5 

5 

4 

4 

4 

4 

3 

7 

35 

25 

J9 

16 

13 

ii 

10 

9 

8 

7 

7 

6 

6 

5 

5 

5 

4 

4 

4 

8 

39 

28 

22 

18 

15 

13 

ii 

10 

9 

8 

8 

7 

7 

6 

6 

5 

5 

5 

5 

9 

42 

31 

24 

20 

17 

14 

13 

ii 

10 

9 

9 

8 

7 

7 

6 

6 

6 

5 

5 

10 

45 

34 

27 

22 

18 

16 

14 

13 

ii 

10 

9 

9 

8 

8 

7 

7 

6 

6 

6 

ii 

36 

29 

24 

20 

17 

15 

14 

12 

ii 

10 

10 

9 

8 

8 

7 

7 

7 

6 

12 

39 

31 

26 

22 

19 

17 

15 

13 

12 

ii 

10 

10 

9 

9 

8 

8 

7 

7 

13 

4i 

33 

27 

23 

20 

18 

16 

15 

13 

12 

ii 

ii 

10 

9 

9 

8 

8 

7 

14 

43 

35 

29 

25 

22 

19 

17 

16 

14 

13 

12 

ii 

ii 

10 

9 

9 

8 

8 

15 

45 

37 

31 

27 

23 

21 

18 

17 

15 

14 

*3 

12 

ii 

ii 

10 

9 

9 

9 

16 

39 

33 

28 

25 

22 

20 

18 

16 

15 

14 

13 

12 

ii 

ii 

10 

10 

9 

17 

40 

34 

30 

26 

23 

21 

19 

17 

16 

15 

14 

13 

12 

ii 

ii 

10 

10 

18 

42 

36 

31 

27 

24 

22 

20 

18 

17 

15 

14 

13 

13 

12 

ii 

ii 

10 

19 

44 

37 

32 

28 

25 

23 

21 

19 

18 

16 

15 

14 

13 

13 

12 

ii 

ii 

20 

45 

39 

34 

30 

27 

24 

22 

20 

18 

17 

16 

15 

14 

13 

13 

12 

ii 

21 

40 

35 

31 

28 

25 

23 

21 

J9 

18 

17 

16 

15 

14 

13 

12 

12 

22 

4i 

36 

32 

29 

26 

24 

22 

20 

J9 

17 

16 

15 

15 

14 

13 

12 

23 

43 

37 

33 

30 

27 

25 

23 

21 

19 

18 

17 

16 

15 

14 

14 

13 

24 

44 

39 

34 

31 

28 

26 

24 

22 

20 

19 

18 

17 

16 

15 

14 

13 

25 

45 

40 

36 

32 

29 

27 

24 

23 

21 

20 

18 

17 

16 

16 

15 

14 

26 

4i 

37 

33 

30 

27 

25 

23 

22 

2O 

19 

18 

17 

16 

15 

15 

27 

42 

38 

34 

31 

28 

26 

24 

22 

21 

20 

19 

18 

17 

16 

15 

28 

43 

39 

35 

32 

29 

27 

25 

23 

22 

20 

19 

18 

17 

16 

16 

29 

44 

40 

36 

33 

30 

28 

26 

24 

23 

21 

20 

*9 

18 

17 

16 

30 

45 

4i 

37 

34 

31 

29 

27 

25 

23 

22 

21 

19 

18 

18 

17 

3i 

42 

38 

35 

32 

29 

27 

25 

24 

22 

21 

20 

19 

18 

17 

32 

42 

39 

35 

33 

30 

28 

26 

25 

23 

22 

21 

20 

19 

18 

33 

43 

40 

36 

33 

31 

29 

27 

25 

24 

22 

21 

20 

*9 

18 

34 

44 

40 

37 

34 

32 

30 

28 

26 

24 

23 

22 

21 

20 

19 

35 

45 

4i 

38 

35 

32 

30 

28 

27 

25 

24 

22 

21 

20 

19 

36 

42 

39 

36 

33 

31 

29 

27 

26 

24 

23 

22 

21 

20 

37 

43 

39 

37 

34 

32 

30 

28 

26 

25 

24 

22 

21 

20 

38 

44 

40 

37 

35 

32 

30 

28 

27 

25 

24 

23 

22 

21 

39 

44 

4i 

38 

35 

33 

31 

29 

27 

26 

25 

23 

22 

21 

40 

45 

42 

39 

36 

34 

32 

30 

28 

27 

25 

24 

23 

22 

41 

42 

39 

37 

34 

32 

30 

29 

27 

26 

24 

23 

22 

42 

43 

40 

37 

35 

33 

31 

29 

28 

26 

25 

24 

23 

43 

44 

4i 

38 

36 

33 

32 

30 

28 

27 

26 

24 

23 

44 

44 

4i 

39 

36 

34 

32 

30 

29 

27 

26 

25 

24 

45 

45 

42 

39 

37 

35 

33 

31 

29 

28 

27 

25 

24 

46 

43 

40 

37 

35 

33 

32 

30 

28 

27 

26 

25 

47 

43 

4i 

38 

36 

34 

32 

30 

29 

28 

26 

25 

48 

44 

4i 

39 

36 

34 

33 

31 

29 

28 

27 

26 

49 

44 

42 

39 

37 

35 

33 

31 

30 

29 

27 

26 

50 

45 

42 

40 

38 

36 

34 

32 

30 

29 

28 

27 

SMITHSONIAN  TABLES 


149 


TABLE  49. 

MEAN    DIRECTION    OF   THE   WIND    BY    LAMBERT'S    FORMULA. 
Values  of  the    mean    direction    (a)    or    its    complement    (90°— a). 


n  or  d. 

DENOMINATOR  OR  NUMERATOR  (d  OR  n). 

105 

MO 

115 

120 

125 

130 

135 

140 

145 

150 

\ 

i° 

i° 

0° 

0° 

0° 

0° 

0° 

0° 

0° 

0° 

2 

i 

i 

i 

i 

i 

i 

i 

i 

i 

i 

3 

2 

2 

i 

i 

i 

i 

i 

i 

i 

i 

4 

2 

2 

2 

2 

2 

2 

2 

2 

2 

2 

5 

3 

3 

2 

2 

2 

2 

2 

2 

2 

2 

6 

3 

3 

3 

3 

3 

3 

3 

2 

2 

2 

7 

4 

4 

3 

3 

3 

3 

3 

3 

3 

3 

8 

4 

4 

4 

4 

4 

4 

3 

3 

3 

3 

9 

4 

4 

4 

4 

4 

4 

4 

4 

4 

3 

10 

5 

5 

5 

5 

5 

4 

4 

4 

4 

4 

ii 

6 

6 

5 

5 

5 

5 

5 

4 

4 

4 

12 

7 

6 

6 

6 

5 

5 

5 

5 

5 

5 

13 

7 

7 

6 

6 

6 

6 

6 

5 

5 

5 

14 

8 

7 

7 

7 

6 

6 

6 

6 

6 

5 

15 

8 

8 

7 

7 

7 

7 

6 

6 

6 

6 

16 

9 

8 

8 

8 

7 

7 

7 

7 

6 

6 

17 

9 

9 

8 

8 

8 

7 

7 

7 

7 

6 

18 

10 

9 

9 

9 

8 

8 

8 

7 

7 

7 

19 

10 

10 

9 

9 

9 

8 

8 

8 

7 

7 

20 

ii 

10 

10 

9 

9 

9 

8 

8 

8 

8 

21 

ii 

ii 

10 

10 

10 

9 

9 

9 

8 

8 

22 

12 

ii 

ii 

10 

10 

10 

9 

9 

9 

8 

23 

12 

12 

ii 

ii 

10 

10 

10 

9 

9 

9 

24 

13 

12 

12 

ii 

ii 

IO 

10 

10 

9 

9 

25 

13 

13 

12 

12 

ii 

II 

10 

10 

10 

9 

26 

14 

13 

13 

12 

12 

II 

ii 

ii 

10 

10 

27 

14 

14 

13 

13 

12 

12 

ii 

ii 

ii 

10 

28 

15 

14 

14 

13 

13 

12 

12 

ii 

ii 

ii 

29 

15 

15 

14 

14 

13 

13 

12 

12 

ii 

ii 

30 

16 

15 

15 

14 

13 

13 

13 

12 

12 

ii 

3i 

16 

16 

15 

14 

14 

13 

13 

12 

12 

12 

32 

17 

16 

16 

15 

14 

14 

13 

13 

12 

12 

33 

17 

17 

16 

15 

15 

14 

*4 

13 

13 

12 

34 

18 

17 

16 

16 

15 

15 

14 

14 

13 

13 

35 

18 

18 

17 

16 

16 

15 

15 

14 

14 

13 

36 

19 

18 

17 

17 

16 

15 

15 

14 

14 

13 

37 

19 

19 

18 

17 

16 

16 

15 

15 

14 

14 

38 

20 

T9 

18 

18 

17 

16 

16 

15 

15 

14 

39 

20 

20 

19 

18 

17 

17 

16 

16 

15 

15 

40 

21 

20 

J9 

18 

18 

17 

17 

16 

15 

15 

4i 

21 

20 

20 

T9 

18 

18 

17 

16 

16 

15 

42 

22 

21 

20 

J9 

!9 

18 

17 

17 

16 

16 

43 

22 

21 

21 

20 

T9 

18 

18 

17 

17 

16 

44 

23 

22 

21 

2O 

19 

19 

18 

17 

17 

16 

45 

23 

22 

21 

21 

20 

*9 

18 

18 

17 

17 

46 

24 

23 

22 

21 

20 

19 

19 

18 

18 

17 

47 

24 

23 

22 

21 

21 

20 

J9 

J9 

18 

17 

48 

25 

24 

23 

22 

21 

20 

20 

19 

18 

18 

49 

25 

24 

23 

22 

21 

21 

20 

19 

19 

18 

50 

25 

24 

23 

23 

22 

21 

20 

20 

19 

18 

SMITHSONIAN  TABLES. 

v 


150 


TABLE  49. 

MEAN    DIRECTION    OF   THE    WIND    BY    LAMBERT'S   FORMULA. 
Values  of  the    mean    direction    (a)    or    its    complement    (90°  —  a). 


n  or  d. 

DENOMINATOR  OR  NUMERATOR  (d  OR  n). 

155 

160 

165 

170 

175 

180 

185 

190 

195 

200 

\ 

0° 

0° 

0° 

0° 

0° 

0° 

0° 

0° 

0° 

0° 

2 

i 

i 

i 

i 

i 

i 

i 

i 

i 

i 

3 

i 

i 

i 

i 

i 

i 

i 

i 

i 

i 

4 

i 

i 

i 

i 

i 

i 

i 

i 

i 

i 

5 

2 

2 

2 

2 

2 

2 

2 

2 

i 

i 

6 

2 

2 

2 

2 

2 

2 

2 

2 

2 

2 

7 

3 

3 

2 

2 

2 

2 

2 

2 

2 

2 

8 

3 

3 

3 

3 

3 

3 

2 

2 

2 

2 

9 

3 

3 

3 

3 

3 

3 

3 

3 

3' 

3 

10 

4 

4 

3 

3 

3 

3 

3 

3 

3 

3 

ii 

4 

4 

4 

4 

4 

3 

3 

3 

3 

3 

12 

4 

4 

4 

4 

4 

4 

4 

4 

4 

3 

13 

5 

5 

5 

4 

4 

4 

4 

4 

4 

4 

14 

5 

5 

5 

5 

5 

4 

4 

4 

4 

4 

15 

6 

5 

5 

5 

5 

5 

5 

5 

4 

4 

16 

6 

6 

6 

5 

5 

5 

5 

5 

5 

5 

17 

6 

6 

6 

6 

6 

5 

5 

5 

5 

5 

18 

7 

7 

6 

6 

6 

6 

6 

6 

5 

5 

19 

7 

7 

7 

6 

6 

6 

6 

6 

6 

5 

20 

21 
22 

1 

8 

7 

I 

7 

7 
7 
7 

7 
7 
7 

6 

7 
7 

6 
6 

7 

6 
6 

7 

6 
6 
6 

6 
6 
6 

23 

8 

8 

8 

8 

7 

7 

7 

7 

7 

7 

24 

9 

9 

8 

8 

8 

8 

7 

7 

7 

7 

25 

9 

9 

9 

8 

8 

8 

8 

7 

7 

7 

26 

10 

9 

9 

9 

8 

8 

8 

8 

8 

7 

27 

10 

10 

9 

9 

9 

9 

8 

8 

8 

8 

28 

10 

10 

10 

9 

9 

9 

9 

8 

8 

8 

29 

ii 

10 

10 

10 

9 

9 

9 

9 

8 

8 

30 

ii 

ii 

10 

10 

10 

9 

9 

9 

9 

9 

31 

ii 

ii 

ii 

10 

10 

10 

10 

9 

9 

9 

32 

12 

ii 

ii 

II 

10 

10 

10 

10 

9 

9 

33 

12 

12 

ii 

II 

II 

10 

10 

10 

10 

9 

34 

12 

12 

12 

II 

II 

ii 

10 

10 

10 

10 

35 

13 

12 

12 

12 

II 

ii 

ii 

10 

10 

10 

36 

13 

13 

12 

12 

12 

ii 

ii 

II 

10 

10 

37 

13 

13 

13 

12 

12 

12 

ii 

II 

II 

10 

38 

14 

13 

13 

13 

12 

12 

12 

II 

II 

II 

39 

14 

14 

13 

13 

13 

12 

12 

12 

II 

II 

40 

14 

14 

14 

13 

13 

13 

12 

12 

12 

II 

41 

15 

14 

14 

14 

13 

13 

12 

12 

12 

12 

42 

15 

15 

14 

14 

13 

13 

13 

12 

12 

12 

43 

16 

15 

15 

14 

14 

13 

13 

13 

12 

12 

44 

16 

15 

15 

15 

14 

14 

13 

13 

13 

12 

45 

16 

16 

15 

15 

14 

14 

14 

13 

13 

13 

46 

17 

16 

16 

15 

15 

14 

14 

14 

13 

13 

47 

17 

16 

16 

15 

15 

15 

14 

14 

14 

13 

48 

17 

17 

16 

16 

15 

15 

15 

14 

14 

13 

49 

18 

17 

17 

16 

16 

15 

15 

14 

14 

14 

50 

18 

17 

17 

16 

16 

16 

15 

15 

14 

14 

SMITHSONIAN  TABLES. 


TABLE  49. 

MEAN    DIRECTION    OF   THE    WIND    BY    LAMBERT'S   FORMULA. 
Values  of  the   mean    direction  (a)    or  its  complement  (90°  — a). 


n 

a  =     d' 

DENOMINATOR  OR  NUMERATOR  (d  OR  n). 

n 

or 

d. 

55 

60 

65 

70 

75 

80 

85 

90 

95 

100 

105 

110 

115 

120 

125 

130 

50 

42° 

40° 

38° 

36° 

34° 

32° 

30° 

29° 

28° 

27° 

25° 

24° 

23° 

23° 

22° 

21° 

52 

43 

41 

39 

37 

35 

33 

30 

29 

27 

26 

25 

24 

23 

23 

22 

54 

44 

42 

40 

38 

36 

34 

32 

30 

28 

27 

26 

25 

24 

23 

22 

56 

43 

39 

37 

35 

33 

32 

29 

28 

27 

26 

25 

24 

23 

58 

44 

42 

40 

38 

36 

34 

33 

3i 

30 

29 

28 

27 

26 

25 

24 

60 

45 

43 

4i 

39 

37 

35 

34 

32 

3i 

30 

29 

28 

27 

26 

25 

62 

44 

42 

40 

38 

36 

35 

33 

32 

29 

28 

27 

26 

25 

64 

45 

42 

40 

39 

37 

35 

34 

33 

31 

30 

29 

28 

27 

26 

66 

43 

41 

40 

38 

36 

35 

33 

32 

31 

30 

29 

28 

27 

68 

44 

42 

40 

39 

37 

36 

34 

33 

32 

3i 

30 

29 

28 

70 

45 

43 

4i 

39 

38 

36 

35 

34 

32 

3i 

30 

29 

28 

72 

44 

42 

40 

39 

37 

36 

34 

33 

32 

30 

29 

74 

45 

43 

39 

38 

37 

35 

34 

33 

32 

31 

30 

76 

44 

42 

40 

39 

37 

36 

35 

33 

32 

31 

30 

78 

44 

43 

41 

39 

38 

37 

35 

34 

33 

32 

31 

80 

45 

43 

42 

40 

39 

37 

36 

35 

34 

33 

32 

82 

44 

42 

39 

38 

37 

35 

34 

33 

32 

84 

45 

43 

41 

40 

39 

37 

36 

35 

34 

33 

86 

44 

42 

39 

38 

37 

36 

35 

33 

88 

44 

43 

41 

40 

39 

37 

36 

35 

34 

90 

45 

43 

42 

41 

39 

38 

37 

36 

35 

92 

44 

43 

41 

40 

39 

37 

36 

35 

94 

45 

43 

42 

41 

39 

38 

37 

36 

96 

44 

42 

41 

40 

39 

38 

36 

98 

44 

43 

42 

40 

39 

38 

37 

100 

45 

44 

42 

4i 

40 

39 

38 

102 

44 

43 

42 

40 

39 

38 

104 

45 

43 

42 

41 

40 

39 

106 

44 

43 

41 

40 

39 

108 

44 

43 

42 

40 

MO 

45 

44 

43 

41 

40 

112 

44 

43 

42 

41 

114 

45 

44 

42 

41 

116 

44 

43 

42 

118 

45 

43 

42 

120 

45 

44 

43 

122 

44 

43 

124 

45 

44 

126 

44 

128 

45 

130 

45 

SMITHSONIAN  TABLES. 


152 


TABLE  49. 


MEAN    DIRECTION    OF  THE   WIND    BY    LAMBERT'S    FORMULA. 
Values  of  the  mean  direction   (a)  or   its  complement  (90°— a). 


n 

OP 

d. 

DENOMINATOR  OR  NUMERATOR  (d  OR  ri). 

130 

135 

140 

145 

150 

155 

160 

165 

170 

175 

180 

185 

190 

195 

200 

50 

21° 

20° 

20° 

19° 

18° 

18° 

17° 

17° 

16° 

16° 

16° 

15° 

15° 

14° 

14° 

52 

22 

21 

20 

20 

19 

19 

18 

17 

17 

17 

16 

16 

15 

15 

15 

54 

22 

22 

21 

20 

20 

*9 

J9 

18 

18 

17 

17 

16 

16 

15 

15 

56 

23 

23 

22 

21 

20 

20 

19 

19 

18 

18 

17 

17 

16 

16 

16 

58 

24 

23 

23 

22 

21 

21 

20 

19 

19 

18 

18 

17 

17 

17 

16 

60 

25 

24 

23 

22 

22 

21 

21 

20 

19 

J9 

18 

18 

18 

17 

17 

62 

25 

25 

24 

23 

22 

22 

21 

21 

20 

20 

19 

19 

18 

18 

17 

64 

26 

25 

25 

24 

23 

22 

22 

21 

21 

20 

20 

19 

19 

18 

18 

66 

27 

26 

25 

24 

24 

23 

22 

22 

21 

21 

20 

20 

19 

.  J9 

18 

68 

28 

27 

26 

25 

24 

24 

23 

22 

22 

21 

21 

20 

20 

19 

19 

70 

28 

27 

27 

26 

25 

24 

24 

23 

22 

22 

21 

21 

2O 

20 

19 

72 

29 

28 

27 

26 

26 

25 

24 

24 

23 

22 

22 

21 

21 

20 

20 

74 

30 

29 

28 

27 

26 

26 

25 

24 

24 

23 

22 

22 

21 

21 

20 

76 

30 

29 

28 

28 

27 

26 

25 

25 

24 

23 

23 

22 

22 

21 

21 

78 

31 

30 

29 

28 

27 

27 

26 

25 

25 

24 

23 

23 

22 

22 

21 

80 

32 

31 

30 

29 

28 

27 

27 

26 

25 

25 

24 

23 

23 

22 

22 

82 

32 

31 

30 

29 

29 

28 

27 

26 

26 

25 

24 

24 

23 

23 

22 

84 

33 

32 

31 

30 

29 

28 

28 

27 

26 

26 

25 

24 

24 

23 

23 

86 

33 

32 

32 

31 

30 

29 

28 

28 

27 

26 

26 

25 

24 

24 

23 

88 

34 

33 

32 

31 

3° 

30 

29 

28 

27 

27 

26 

25 

25 

24 

24 

90 

35 

34 

33 

32 

31 

30 

29 

29 

28 

27 

27 

26 

25 

25 

24 

92 

35 

34 

33 

32 

32 

31 

30 

29 

28 

28 

27 

26 

26 

25 

25 

94 

36 

35 

34 

33 

32 

31 

30 

30 

29 

28 

28 

27 

26 

26 

25 

96 

36 

35 

34 

34 

33 

32 

31 

30 

29 

29 

28 

27 

27 

26 

26 

98 

37 

36 

35 

34 

33 

32 

31 

31 

30 

29 

29 

28 

27 

27 

26 

100 

38 

37 

36 

35 

34 

33 

32 

31 

30 

30 

29 

28 

28 

27 

27 

102 

38 

37 

36 

35 

34 

33 

33 

32 

31 

30 

30 

29 

28 

28 

27 

104 

39 

38 

37 

36 

35 

34 

33 

32 

31 

31 

30 

29 

29 

28 

27 

106 

39 

38 

37 

36 

35 

34 

34 

33 

32 

31 

30 

30 

29 

29 

28 

108 

40 

39 

38 

37 

36 

35 

34 

33 

32 

32 

31 

30 

30 

29 

28 

110 

40 

39 

38 

37 

36 

35 

35 

34 

33 

32 

31 

31 

30 

29 

29 

112 

4i 

40 

39 

38 

37 

36 

35 

34 

33 

33 

32 

31 

31 

30 

29 

114 

4i 

40 

39 

38 

37 

36 

35 

35 

34 

33 

32 

32 

31 

30 

30 

116 

42 

4i 

40 

39 

38 

37 

36 

35 

34 

34 

33 

32 

31 

31 

30 

118 

42 

4i 

40 

39 

38 

37 

36 

36 

35 

34 

33 

33 

32 

31 

31 

120 

43 

42 

4i 

40 

39 

38 

37 

36 

35 

34 

34 

33 

32 

32 

31 

122 

43 

42 

4i 

40 

39 

38 

37 

36 

36 

35 

34 

33 

33 

32 

31 

124 

44 

43 

42 

4i 

40 

39 

38 

37 

36 

35 

35 

34 

33 

32 

32 

126 

44 

43 

42 

4i 

40 

39 

38 

37 

37 

36 

35 

34 

34 

33 

32 

128 

45 

43 

42 

4i 

40 

40 

39 

38 

37 

36 

35 

35 

34 

33 

33 

130 

45 

44 

43 

42 

4i 

40 

39 

38 

37 

37 

36 

35 

34 

34 

33 

132 

44 

43 

42 

4i 

40 

40 

39 

38 

37 

36 

35 

35 

34 

33 

134 

45 

44 

43 

42 

41 

40 

39 

38 

37 

37 

36 

35 

34 

34 

136 

44 

43 

42 

4i 

40 

39 

39 

38 

37 

36 

% 

35 

34 

138 

45 

44 

43 

42 

4i 

40 

39 

38 

37 

37 

36 

35 

35 

140 

45 

44 

43 

42 

41 

40 

39 

39 

38 

37 

36 

36 

35 

142 

44 

43 

42 

42 

4i 

40 

39 

38 

38 

37 

36 

35 

144 

45 

44 

43 

42 

4i 

40 

39 

39 

38 

37 

36 

% 

146 

44 

43 

42 

42 

4i 

40 

39 

38 

3? 

37 

36 

148 

45 

44 

43 

42 

4i 

40 

39 

39 

38 

37 

37 

150 

45 

44 

43 

42 

4i 

4i 

40 

39 

38 

38 

37 

SMITHSONIAN  TABLES. 


153 


TABLE  50. 

SYNOPTIC    CONVERSION    OF  VELOCITIES. 

Miles    per   hour   into    metres    per   second,   feet    per  second 

and    kilometres    per    hour. 


Miles 
per 
hour. 

Metres 
per 
second. 

Feet 
per 
second. 

Kilome- 
tres per 
hour. 

Miles 
per 
hour. 

Metres 
per 
second. 

Feet 
per 
second. 

Kilome- 
tres per 
hour. 

Miles 
per 
hour. 

Metres 
per 
second. 

Feet 
per 
second. 

Kilome- 
tres per 
hour. 

0.0 

0.0 

o.o 

0.0 

26.0 

n.6 

38.1 

41.8 

52.0 

23.2 

76-3 

83.7 

o-5 

O.2 

0.7 

0.8 

26.5 

n.8 

38.9 

42.6 

52.5 

23.5 

77.0 

84.5 

I.O 

0.4 

1.5 

1.6 

27.0 

12.  1 

39-6 

43-5 

53-0 

23.7 

77-7 

85.3 

i-5 

0.7 

2.2 

2.4 

27.5 

12.3 

40.3 

44-3 

53-5 

23-9 

78.5 

86.1 

2.O 

0.9 

2-9 

3.2 

28.0 

12.5 

41.1 

45-1 

54-0 

24.1 

79-2 

86.9 

2-5 

I.I 

3-7 

4.0 

28.5 

12.7 

41.8 

45-9 

54-5 

244 

79-9 

877 

3.0 

1-3 

44 

4.8 

29.0 

13.0 

42-5 

46.7 

55.0 

24.6 

80.7 

88.5 

3-5 

1.6 

5-1 

5-6 

29-5 

13.2 

43-3 

47-5 

55.5 

24.8 

81.4 

89-3 

4.0 

1.8 

5-9 

6.4 

30.0 

134 

44.0 

48.3 

56.0 

25.0 

82.1 

90.1 

4-5 

2.0 

6.6 

7.2 

30.5 

13.6 

44-7 

49.1 

56.5 

25.3 

82.9 

90.9 

5-0 

2.2 

7.3 

8.0 

31.0 

13-9 

45-5 

49-9 

57-0 

25-5 

83.6 

91.7 

5-5 

2-5 

8.1 

8.9 

31.5 

I4.I 

46.2 

50.7 

57.5 

25-7 

84.3 

92.5 

6.0 

2.7 

8.8 

9-7 

32.0 

14.3 

46.9 

5L5 

58.0 

25-9 

85.1 

93-3 

6-5 

2-9 

9-5 

10.5 

32.5 

14-5 

47-7 

52.3 

58.5 

26.2 

85.8 

94.1 

7-o 

3-i 

10.3 

H-3 

33-0 

14.8 

48.4 

53-1 

59.o 

26.4 

86.5 

95-0 

7-5 

34 

II.O 

I2.I 

33-5 

15.0 

49.1 

53-9 

59-5 

26.6 

87.3 

95-8 

8.0 

3-6 

11.7 

I2.9 

34.o 

15.2 

49-9 

54-7 

60.0 

26.8 

88.0 

96.6 

8.5 

3-8 

12.5 

13-7 

34-5 

154 

50.6 

55-5 

60.5 

27.0 

88.7 

974 

9.0 

4.0 

13-2 

M-5 

35.0 

15-6 

51-3 

56.3 

61.0 

27.3 

89-5 

98.2 

9-5 

4.2 

13-9 

15.3 

35-5 

J5-9 

52.1 

57.1 

61.5 

27-5 

90.2 

99.0 

10.0 

4-5 

14.7 

16.1 

36.0 

16.1 

52.8 

57.9 

62.0 

27.7 

90.9 

99.8 

10.5 

4-7 

154 

16.9 

36.5 

16.3 

53-5 

58.7 

62.5 

27.9 

91.7 

100.6 

II.O 

4-9 

16.1 

17.7 

37-0 

16.5 

54-3 

59-5 

63.0 

28.2 

92.4 

101.4 

11.5 

5.1, 

16.9 

18.5 

37.5 

16.8 

55-0 

60.4 

63.5 

28.4 

93-1 

102.2 

12.0 

54 

17.6 

19-3 

38.0 

17.0 

55-7 

61.2 

64.0 

28.6 

93-9 

103.0 

12.5 

5-6 

18.3 

20.1 

38.5 

17.2 

56.5 

62.0 

64-5 

28.8 

94.6 

103.8 

13-0 

5-8 

19.1 

20.9 

39-o 

174 

57-2 

62.8 

65.0 

29.1 

95-3 

104.6 

13-5 

6.0 

19.8 

21.7 

39-5 

17.7 

57-9 

63.6 

65.5 

29-3 

96.1 

1054 

14.0 

6-3 

20.5 

22.5 

40.0 

17.9 

58.7 

64.4 

66.0 

29-5 

96.8 

106.2 

14-5 

6.5 

21.3 

23-3 

40.5 

18.1 

594 

65.2 

66.5 

29.7 

97.5 

107.0 

15.0 

6.7 

22.0 

24.1 

41.0 

18.3 

60.1 

66.0 

67.0 

30.0 

98.3 

107.8 

15-5 

6-9 

22.7 

24.9 

41-5 

18.6 

60.9 

66.8 

67-5 

30.2 

99.0 

108.6 

1  6.0 

7.2 

23.5 

257 

42.0 

18.8 

61.6 

67.6 

68.0 

3°4 

99-7 

109.4 

16.5 

74 

24.2 

26.6 

42-5 

19.0 

62.3 

68.4 

68.5 

30.6 

100.5 

IIO.2 

17.0 

7-6 

24.9 

274 

43-0 

19.2 

63-1 

69.2 

69.0 

30.8 

IOI.2 

III.O 

17-5 

7-8 

25.7 

28.2 

43-5 

19.4 

63.8 

70.0 

69.5 

3i-i 

IOI.9 

1  1  1.8 

18.0 

8.0 

26.4 

29.0 

44.0 

19.7 

64-5 

70.8 

70.0 

31-3 

102.7 

112.7 

18.5 

8.3 

27.1 

29.8 

44-5 

19.9 

65.3 

71.6 

70-5 

3i-5 

1034 

II3-5 

19.0 

8.5 

27.9 

30.6 

45-0 

20.1 

66.0 

72.4 

71.0 

31.7 

IO4.I 

II4-3 

!9-5 

8.7 

28.6 

3r-4 

45-5 

20.3 

66.7 

73-2 

71-5 

32.0 

104.9 

115.1 

2O.O 

8-9 

29-3 

32.2 

46.0 

20.6 

67.5 

74.0 

72.0 

32.2 

105.6 

II5-9 

20.5 

9.2 

30.1 

33-o 

46.5 

20.8 

68.2 

74-8 

72.5 

324 

I06.3 

116.7 

21.0 

94 

30.8 

33-8 

47.0 

21.0 

68.9 

75-6 

73.0 

32.6 

IO7.I 

H7.5 

21.5 

9.6 

31-5 

34-6 

47-5 

21.2 

69.7 

76.4 

73-5 

32.9 

107.8 

118.3 

22.0 

9.8 

32.3 

354 

48.0 

21.5 

70.4 

77.2 

74.0 

33-1 

108.5 

119.1 

22.5 

10.  1 

33-0 

36.2 

48.5 

21.7 

71.1 

78.1 

74-5 

33-3 

109.3 

119.9 

23.0 

10.3 

33-7 

37-0 

49.0 

21.9 

71.9 

78.9 

75.o 

33-5 

IIO.O 

120.7 

23.5 

10.5 

34-5 

37-8 

49-5 

22.1 

72.6 

79-7 

75-5 

33-8 

110.7 

121.5 

24.0 

10.7 

35.2 

38.6 

50.0 

22.4 

73-3 

80.5 

76.0 

34-0 

111.5 

122.3 

24-5 

II.O 

35-9 

394 

50.5 

22.6 

74.1 

81.3 

76.5 

34-2 

II2.2 

123.1 

25.0 

II.2 

36.7 

40.2 

51-0 

22.8 

74-8 

82.1 

77.0 

344 

II2-9 

123.9 

25-5 

II.4 

374 

41.0 

5L5 

23.0 

75-5 

82.9 

77.5 

34-6 

II3-7 

124.7 

26.0 

n.6 

38.1 

41.8 

52.0 

23.2 

76.3 

837 

78.0 

34-9 

1144 

125-5 

SMITHSONIAN  TABLES. 


154 


TABLE  51. 


MILES    PER    HOUR    INTO    FEET    PER    SECOND. 

i  mile  per  hour  =  —  feet  per  second. 
30 


Miles 
per  hour. 

0 

1 

2 

3 

4 

5 

6 

7 

8 

9 

Feet  per 

Feet  per 

Feet  pei 

Feet  per 

Feet  per 

Feet  per 

Feet  per 

Feet  per 

Feet  per 

Feet  per 

sec. 

sec. 

sec. 

sec. 

sec 

sec. 

sec. 

sec. 

sec. 

sec. 

0 

o.o 

1-5 

2-9 

4-4 

5-9 

7.3 

8.8 

10,3 

11.7 

13.2 

10 

14.7 

16.1 

I7.6 

I9.I 

20.5 

22.O 

23-5 

24.9 

26.4 

27-9 

20 

29-3 

30.8 

32.3 

33-7 

35-2 

36.7 

38.1 

39-6 

4I.I 

42.5 

30 

44.0 

45-5 

46.9 

48.4 

49-9 

51-3 

52.8 

54-3 

55-7 

57-2 

40 

58.7 

60.  i 

61.6 

63.1 

64.5 

66.0 

67.5 

68.9 

70.4 

71.9 

50 

73-3 

74-8 

76.3 

77-7 

79.2 

80.7 

82.1 

83.6 

85.1 

86.5 

60 

88.0 

89.5 

90.9 

92.4 

93.9 

95-3 

96.8 

98.3 

99.7 

IOI.2 

70 

102.7 

104.1 

105.6 

107.1 

108.5 

no.o 

in.  5 

112.9 

114.4 

H5.9 

80 

II7-3 

118.8 

120.3 

121.7 

123.2 

124.7 

126.1 

127.6 

129.1 

130.5 

90 

132.0 

!33-5 

134.9 

136.4 

137.9 

139.3 

140.8 

142.3 

143.7 

145.2 

100 

146.7 

148.1 

149.6 

I5I.I 

152.5 

154.0 

155.5 

156.9 

158.4 

I59>9 

no 

161.3 

162.8 

164.3 

165.7 

167.2 

168.7 

170.1 

171.6 

I73-I 

174-5 

1  20 

176.0 

177.5 

178.9 

180.4 

181.9 

183.3 

184.8 

186.3 

187.7 

189.2 

130 

190.7 

192.1 

193.6 

I95.I 

196.5 

198.0 

199-5 

200.9 

202.4 

203.9 

140 

205.3 

206.8 

208.3 

209.7 

211.  2 

212.7 

214.1 

215.6 

217.1 

218.5 

TABLE  52. 


FEET    PER    SECOND    INTO    MILES    PER    HOUR. 

30 

i  foot  per  second  =  —  miles  per  hour. 
44 


Feet 
per  sec. 

0 

1 

2 

3 

4 

5 

6 

7 

8 

9 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

0 

O.O 

0.7 

1,4 

2.0 

2.7 

3.4 

4.1 

4.8 

5.5 

6.1 

10 

6.8 

7-5 

8.2 

8.9 

9-5 

IO.2 

10.9 

11.6 

12.3 

13.0 

20 

13.6 

14.3 

15.0 

15-7 

16.4 

17.0 

17.7 

18.4 

19.1 

19.8 

30 

20.5 

21.  1 

21.8 

22.5 

23.2 

23-9 

24.5 

25.2 

25.9 

26.6 

40 

27-3 

28.0 

28.6 

29-3 

30.0 

30.7 

31.4 

32.0 

32.7 

33-4 

50 

34-1 

34-8 

35.5 

36.1 

36.8 

37-5 

38.2 

38.9 

39-5 

40.2 

60 

40.9 

41.6 

42.3 

43-0 

43-6 

44.3 

45-0 

45-7 

46.4 

47.0 

70 

47-7 

48.4 

49.1 

49-8 

50.5 

5I-I 

51.8 

52.5 

53-2 

53-9 

80 

54-5 

55-2 

55.9 

56.6 

57-3 

58.0 

58.6 

59-3 

60.0 

60.7 

90 

61.4 

62.0 

62.7 

63.4 

64.1 

64.8 

65.5 

66.1 

66.8 

67-5 

100 

68.2 

68.9 

69.5 

70.2 

70.9 

71.6 

72.3 

73-0 

73.6 

74.3 

no 

75-0 

75-7 

76.4 

77-0 

77-7 

78-4 

79-1 

79-8 

80.5 

81.1 

120 

81.8 

82.5 

83.2 

83.9 

84.5 

85.2 

85.9 

86.6 

87.3 

88.0 

130 

88.6 

89-3 

90.0 

90.7 

91.4 

92.0 

92.7 

93.4 

94.1 

94.8 

140 

95-5 

96.1 

96.8 

97-5 

98.2 

98.9 

99-5 

100.2 

100.9 

101.6 

150 

102.3 

103.0 

103.6 

104.3 

105.0 

105.7 

106.4 

107.0 

107.7 

108.4 

160 

109.1 

109.8 

110.5 

III.  I 

in.  8 

112.5 

113.2 

113-9 

1  14-  5 

115-2 

170 

H5.9 

116.6 

117.3 

IlS.O 

118.6 

119.3 

120.0 

120.7 

121.4 

I2O.O 

180 

122.7 

123.4 

124.1 

124.8 

125.5 

126.1 

126.8 

127.5 

128.2 

128.9 

190 

129-5 

130.2 

130.9 

131.6 

132.3 

133.0 

133.6 

134.3 

I35.o 

135.7 

SMITHSONIAN  TABLES. 


155 


TABLE  53. 


METRES    PER    SECOND    INTO    MILES    PER    HOUR. 

i  metre  per  second  =  2.236932  miles  per  hour. 


Metres  per 
second. 

0.0 

O.I 

0.2 

0.3 

0.4 

0.5 

0.6 

0.7 

0.8 

0.9 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

0 

0.0 

0.2 

0.4 

0.7 

0.9 

I.I 

1-3 

1.6 

1.8 

2.0 

I 

2.2 

2-5 

2.7 

2.9 

3-1 

3-4 

3-6 

3-8 

4.0 

4-3 

2 

4-5 

4-7 

4-9 

5-i 

5-4 

5-6 

5-8 

6.0 

6-3 

6-5 

3 

6.7 

6.9 

7.2 

7-4  . 

7-6 

7.8 

8.1 

8-3 

8.5 

8-7 

4 

8.9 

9.2 

9-4 

9.6 

9-8 

10.  1 

10.3 

10.5 

10.7 

II.  0 

5 

II.2 

11.4 

11.6 

11.9 

12.  1 

12.3 

12.5 

12.8 

13.0 

13.2 

6 

13-4 

13-6 

13-9 

14.1 

14-3 

14.5 

14.8 

15.0 

15-2 

15-4 

7 

15.7 

15-9 

16.1 

16.3 

16.6 

16.8 

17.0 

17.2 

17.4 

17.7 

8 

17.9 

18.1 

18.3 

18.6 

18.8 

19.0 

19.2 

19.5 

19.7 

19.9 

9 

20.1 

20.4 

2O.6 

20.8 

21.0 

21.3 

21.5 

21.7 

21.9 

22.1 

10 

22.4 

22.6 

22.8 

23.0 

23-3 

23-5 

23.7 

23-9 

24.2 

24.4 

ii 

24.6 

24.8 

25.1 

25-3 

25-5 

25-7 

25-9 

26.2 

26.4 

26.6 

12 

26.8 

27.1 

27-3 

27-5 

27.7 

28.0 

28.2 

28.4 

28.6 

28.9 

13 

29.I 

29-3 

29.5 

29.8 

30.0 

30.2 

30-4 

30.6 

3°-9 

3I.I 

14 

31-3 

31-5 

31-8 

32-0 

32.2 

32.4 

32.7 

32.9 

33-1 

33-3 

15 

33-6 

33-8 

34-0 

34-2 

34-4 

34-7 

34-9 

35-1 

35-3 

35.6 

16 

35-8 

36.0 

36.2 

36.5 

36.7 

36-9 

37.1 

37-4 

37-6 

37-8 

17 

38.0 

38.3 

38.5 

38.7 

38.9 

39-1 

39-4 

39-6 

39.8 

40.0 

18 

40.3 

40.5 

40.7 

40.9 

41.2 

41.4 

41.6 

41.8 

42.1 

42.3 

19 

42.5 

42.7 

43-0 

43-2 

43-4 

43-6 

43-8 

44.1 

44-3 

44-5 

20 

44-7 

45-0 

45-2 

45-4 

45-6 

45-9 

46.1 

46.3 

46.5 

46.8 

21 

47.0 

47-2 

47-4 

47.6 

47-9 

48.1 

48.3 

48.5 

48.8 

49.0 

22 

49.2 

49.4 

49-7 

49-9 

50.1 

50.3 

50.6 

50.8 

5i.o 

51.2 

23 

51-5 

51-7 

51-9 

52.1 

52.3 

52.6 

52.8 

53-o 

53-2 

53-5 

24 

53-7 

53-9 

54-1 

54-4 

54-6 

54-8 

55-0 

55-3 

55-5 

55-7 

25 

55-9 

56.1 

56.4 

56.6 

56.8 

57-0 

57-3 

57-5 

57-7 

57-9 

26 

58.2 

58.4 

58.6 

58.8 

59-i 

59-3 

59-5 

59-7 

60.0 

60.2 

27 

60.4 

60.6 

60.8 

61.1 

61.3 

61.5 

61.7 

62.0 

62.2 

62.4 

28 

62.6 

62.9 

63.1 

63-3 

63-5 

63.8 

64.0 

64.2 

644 

64.6 

29 

64.9 

65-1 

65.3 

65-5 

65.8 

66.0 

66.2 

66.4 

66.7 

66.9 

30 

67.1 

67.3 

67.6 

67.8 

68.0 

68.2 

68.5 

68.7 

68.9 

69.1 

3i 

69-3 

69.6 

69.8 

70.0 

70.2 

70.5 

70.7 

70.9 

71.1 

71.4 

32 

71.6 

71.8 

72.0 

72.3 

72-5 

72.7 

72.9 

73-1 

73-4 

73-6 

33 

73-8 

74.0 

74-3 

74-5 

74-7 

74-9 

75-2 

75-4 

75-6 

75-8 

34 

76.1 

76.3 

76.5 

76.7 

77.0 

77.2 

77-4 

77-6 

77-8 

78.1 

35 

78.3 

78.5 

78.7 

79.0 

79.2 

79-4 

79.6 

79-9 

80.  i 

80.3 

36 

80.5 

80.8 

81.0 

81.2 

81.4 

81.6 

81.9 

82.1 

82.3 

82.5 

37 
38 

82.8 
85.0 

83.0 
85.2 

83.2 
85.5 

83-4 
85.7 

83-7 
85-9 

84.0 
86.1 

84.1 
86.3 

84-3 
86.6 

84.6 
86.8 

84.8 
87.0 

39 

87.2 

87.5 

87.7 

87.9 

88.1 

88.4 

88.6 

88.8 

89.0 

89-3 

40 

89.5 

89.7 

89.9 

90.2 

90.4 

90.6 

90.8 

91.0 

9L3 

91-5 

4i 

91.7 

91.9 

92.2 

92.4 

92.6 

92.8 

93-1 

93-3 

93-5 

93.7 

42 

94.0 

94-2 

94-4 

94.6 

94.8 

95-1 

95-3 

95-5 

95-7 

96.0 

43 

96.2 

96.4 

96.6 

96.9 

97-1 

97-3 

97-5 

97-8 

98.0 

98.2 

44 

98.4 

98.7 

98.9 

99.1 

99-3 

99-5 

99.8 

100.0 

100.2 

100.4 

SMITHSONIAN  TABLES 


156 


TABLE   53. 


METRES    PER    SECOND    INTO    MILES    PER    HOUR. 


Metres  per 
second. 

0.0 

O.I 

0.2 

0.3 

0.4 

0.5 

0.6 

0.7 

0.8 

i 

0.9 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles  i 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

45 

100.7 

100.9 

IOI.I 

101.3 

IOI.6 

IOI.8 

IO2.O 

IO2.2 

102.5 

IO2.7 

46 

102.9 

103.1 

103.3 

103.6 

103.8 

104.0 

104.2 

104.5 

104.7 

104.9 

47 

105.1 

105.4 

105.6 

105.8 

106.0 

106.3 

106.5 

106.7 

106.9 

107.2 

48 

107.4 

107.6 

107.8 

108.0 

108.3 

108.5 

108.7 

108.9 

109.2 

109.4 

49 

109.6 

109.8 

1  10.  1 

110.3 

110.5 

IIO.7 

III.O 

III.  2 

III.4 

in.  6 

50 

in.  8 

112.  1 

112.3 

112.5 

112.7 

II3.0 

II3.2 

II3-4 

113.6 

II3-9 

51 

114.1 

H4.3 

114.5 

114.8 

115.0 

II5.2 

II5-4 

H5.7 

II5-9 

116.1 

52 

116.3 

116.6 

116.8 

II7.0 

117.2 

117.4 

II7.7 

II7.9 

118.1 

118.3 

53 

118.6 

118.8 

119.0 

119.2 

II9-5 

119.7 

II9.9 

1  2O.  I 

120.4 

1  20.  6 

54 

120.8 

121.  0 

121.3 

I2I.5 

121.7 

121.9 

122.  1 

122.4 

122.6. 

122.8 

55 

123.0 

123.3 

123.5 

123.7 

123.9 

124.2 

1244 

124.6 

124.8 

125.1 

56 

125-3 

125.5 

125.7 

I26.O 

126.2 

126.4 

126.6 

126.8 

I27.I 

127.3 

57 

127.5 

127.8 

128.0 

128.2 

128.4 

.128.6 

128.9 

I29.I 

129.3 

129.5 

58 

129.8 

130.0 

130.2 

130.4 

130.7 

130.9 

I3I.I 

131.3 

I3I.6 

131.8 

59 

132.0 

132.2 

132.5 

132.7 

132.9 

I33.I 

133-3 

133.6 

133.8 

134.0 

TABLE   54. 


MILES    PER    HOUR    INTO    METRES    PER    SECOND. 

i  mile  per  hour  =  0.4470409  metres  per  second. 


Miles  per 
hour. 

0 

I 

2 

3 

4 

5 

6 

7 

8 

9 

metres 

metres 

metres 

metres 

metres 

metres 

metres 

metres 

metres 

metres 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

0 

O.OO 

0-45 

0.89 

1-34 

1.79 

2.24 

2.68 

3-13 

3-58 

4.02 

10 

4.47 

4.92 

5.36 

5-81 

6.26 

6.71 

7-15 

7.60 

8.05 

8.49 

20 

8.94 

9-39 

9-83 

10.28 

10.73 

II.I8 

11.62 

12.07 

12.52 

12.96 

30 

13.41 

13.86 

14.31 

14-75 

15.20 

15.65 

16.09 

16.54 

16.99 

17.43 

40 

17.88 

18.33 

18.78 

19.22 

19.67 

20.  1  2 

20.56 

21.01 

21.46 

21.91 

50 

22-35 

22.80 

23.25 

23.69 

24.14 

24.59 

25-03 

25.48 

25-93 

26.38 

60 

26.82 

27.27 

27.72 

28.16 

28.61 

29.06 

29.50 

29-95 

30.40 

30.85 

70 

31.29 

31.74 

32.19 

32.63 

33.08 

33-53 

33.98 

34-42 

34.87 

35-32 

80 

35.76 

36.21 

36.66 

37.10 

37-55 

38.00 

38.45 

38.89 

39-34 

39-79 

90 

40.23 

40.68 

41.13 

41-57 

42.02 

42.47 

42.92 

43.36 

43-81 

44.26 

100 

44.70 

45-15 

45.60 

46.05 

46.49 

46.94 

47-39 

47.83 

48.28 

48.73 

no 

49.17 

49.62 

50.07 

50.52 

50.96 

5L4I 

51-86 

52.30 

52.75 

53-20 

120 

53.64 

54.09 

54-54 

54-99 

55-43 

55-88 

56.33 

56.77 

57-22 

57-67 

130 

58.12 

58.56 

59-01 

5946 

59.90 

60.35 

60.80 

61.24 

61.69 

62.14 

140 

62-59 

63.03 

63.48 

63.93 

64.37 

64.82 

65.27 

65.72 

66.16 

66.61 

SMITHSONIAN  TABLES. 


157 


TABLE  55. 

METRES    PER    SECOND    INTO    KILOMETRES    PER    HOUR. 

i  metre  per  second  =  3.6  kilometres  per  hour. 


Metres  per 
second. 

0.0 

O.I 

0.2 

0.3 

0.4 

0.5 

0.6 

0.7 

0.8 

0.9 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

0 

0.0 

0.4 

0.7 

I.I 

1.4 

1.8 

2.2 

2-5 

2.9 

3-2 

i 

3-6 

4.0 

4-3 

4-7 

5-0 

5-4 

5.8 

6.1 

6-5 

6.8 

2 

7.2 

7-6 

7-9 

8.3 

8.6 

9.0 

9-4 

9-7 

10.  1 

10.4 

3 

10.8 

II.  2 

II-5 

11.9 

12.2 

12.6 

13.0 

13.3 

13.7 

14.0 

4 

14.4 

14.8 

I5-I 

15-5 

I5.8 

16.2 

16.6 

16.9 

17-3 

I7.6 

5 

18.0 

18.4 

I8.7 

19.1 

194 

19.8 

20.2 

20.5 

20.9 

21.2 

6 

21.6 

22.0 

22.3 

22.7 

23.0 

23.4 

23-8 

24.1 

24-5 

24.8 

7 

25-2 

25-6 

25.9 

26.3 

26.6 

27.0 

27.4 

27.7 

28.1 

28.4 

8 

28.8 

29.2 

29-5 

29.9 

30.2 

30.6 

31.0 

31-3 

3L7 

32.0 

9 

32.4 

32.8 

33-1 

33-5 

33-8 

34.2 

34-6 

34-9 

35-3 

35-6 

10 

36.0 

36.4 

36.7 

37.1 

374 

37-8 

38.2 

38.5 

38.9 

39-2 

ii 

39-6 

40.0 

40.3 

40.7 

41.0 

41.4 

41.8 

42.1 

42-5 

42.8 

12 

43-2 

43-6 

43.9 

44-3 

44.6 

45-0 

45-4 

45-7 

46.1 

46.4 

13 

46.8 

47.2 

47-5 

47-9 

48.2 

48.6 

49.0 

49-3 

49-7 

50.0 

14 

50.4 

50.8 

5i.i 

51-5 

51.8 

52.2 

52.6 

52.9 

53-3 

53.6 

15 

54-0 

54-4 

54-7 

55-1 

55-4 

55-8 

56.2 

56.5 

56.9 

57-2 

16 

57-6 

58.0 

58.3 

58.7 

59-0 

59-4 

59.8 

60.  i 

60.5 

60.8 

17 

61.2 

61.6 

61.9 

62.3 

62.6 

63.0 

63.4 

63-7 

64.1 

64.4 

18 

64.8 

65.2 

65.5 

65-9 

66.2 

66.6 

67.0 

67.3 

67.7 

68.0 

19 

68.4 

68.8 

69.1 

69.5 

69.8 

70.2 

70.6 

70.9 

7L3 

71.6 

20 

72.0 

72.4 

72.7 

73-1 

73.4 

73.8 

74-2 

74-5 

74-9 

75-2 

21 

75-6 

76.0 

76.3 

76.7 

77.0 

77-4 

77-8 

78.1 

78.5 

78.8 

22 

79-2 

79.6 

79.9 

80.3 

80.6 

81.0 

81.4 

81.7 

82.1 

82.4 

23 

82.8 

83-2 

83.5 

83.9 

84.2 

84.6 

85.0 

85-3 

85.7 

86.0 

24 

86.4 

86.8 

87.1 

87-5 

87.8 

88.2 

88.6 

88.9 

89.3 

89.6 

25 

90.0 

90.4 

90.7 

91.1 

91.4 

91.8 

92.2 

92.5 

92.9 

93.2 

26 

93-6 

94.0 

94-3 

94.7 

95-0 

95.4 

95.8 

96.1 

96.5 

96.8 

27 

97.2 

97.6 

97-9 

98.3 

98.6 

99-0 

994 

99-7 

100.  1 

100.4 

28 

100.8 

IOI.2 

101.5 

101.9 

102.2 

102.6 

103.0 

103.3 

103.7 

104.0 

29 

104.4 

104.8 

105.1 

105.5 

105.8 

106.2 

106.6 

106.9 

107.3 

107.6 

30 

108.0 

108.4 

108.7 

109.1 

109.4 

109.8 

1  10.  2 

110.5 

110.9 

III.  2 

3i 

in.  6 

II2.0 

112.3 

112.7 

II3.0 

113.4 

II3.8 

114.1 

II4-5 

II4.8 

32 

115.2 

II5.6 

II5-9 

116.3 

116.6 

117.0 

II7.4 

117.7 

118.1 

II8.4 

33 

118.8 

II9.2 

ii9o 

119.9 

120.2 

120.6 

121.  0 

121.3 

121.7 

122.  0 

34 

122.4 

122.8 

123.1 

123.5 

123.8 

124.2 

124.6 

124.9 

125.3 

125.6 

35 

126.0 

126.4 

126.7 

127.1 

127.4 

127.8 

128.2 

128.5 

128.9 

129.2 

36 

129.6 

130.0 

130.3 

130.7 

I3I.O 

131.4 

I3L8 

132.1 

132-5 

132.8 

37 

133-2 

133.6 

133-9 

134.3 

134.6 

135.0 

135-4 

135.7 

136.1 

136.4 

38 

136.8 

137.2 

137.5 

137-9 

138.2 

138.6 

139.0 

139.3 

139.7 

140.0 

39 

140.4 

140.8 

141.1 

I4I.5 

I4I.8 

142.2 

142.6 

142.9 

143.3 

143.6 

40 

144.0 

144.4 

144.7 

I45.I 

145-4 

145.8 

146.2 

146.5 

146.9 

147.2 

4i 

147.6 

148.0 

148.3 

148.7 

149.0 

149.4 

149.8 

150.1 

150.5 

150.8 

42 
43 

151.2 
154.8 

I5I.6 
155-2 

151-9 
155.5 

152.3 
155.9 

152.6 
156.2 

153.0 
156.6 

1534 
157.0 

153-7 
157.3 

I54.I 
157-7 

154.4 
158.0 

44 

158.4 

158.8 

I59-I 

159-5 

159-8 

160.2 

160.6 

160.9 

161.3 

161.6 

SMITHSONIAN  TABLES. 


158 


TABLE  55. 
METRES    PER    SECOND    INTO    KILOMETRES    PER     HOUR. 


Metres  per 
second. 

0.0 

O.I 

0.2 

0.3 

0.4 

0.5 

0.6 

0.7 

0.8 

0.9 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

45 

162.0 

162.4 

162.7 

163.1 

163.4 

163.8 

164.2 

164.5 

164.9 

165.2 

46 

165.6 

166.0 

166.3 

166.7 

167.0 

167.4 

167.8 

I68.I 

168.5 

168.8 

47 

169.2 

169.6 

169.9 

170.3 

170.6 

171.0 

171.4 

I7I.7 

I72.I 

172.4 

48 

172.8 

173.2 

173-5 

173.9 

174.2 

174.6 

175.0 

175.3 

175-7 

176.0 

49 

176.4 

176.8 

I77.I 

177-5 

177.8 

178.2 

178.6 

178.9 

179-3 

179.6 

50 

iSo.O 

180.4 

180.7 

l8l.I 

181.4 

181.8 

182.2 

182.5 

182.9 

183.2 

5i 

183.6 

184.0 

184.3 

184.7 

185.0 

185.4 

185.8 

I86.I 

186.5 

186.8 

52 

187.2 

187.6 

187.9 

188.3 

188.6 

189.0 

189.4 

189.7 

190.1" 

190.4 

53 

190.8 

191.2 

I9L5 

191.9 

192.2 

192.6 

193.0 

193.3 

193.7 

194.0 

54 

194.4 

194.8 

I95.I 

195.5 

195-8 

196.2 

196.6 

196.9 

197.3 

197.6 

55 

198.0 

198.4 

198.7 

199.1 

199.4 

199.8 

200.2 

200.5 

200.9 

2OI.2 

56 

201.6 

202.0 

202.3 

202.7 

203-0 

203.4 

203.8 

204.1 

204.5 

204.8 

57 

205.2 

205.6 

205.9 

206.3 

206.6 

207.0 

207.4 

207.7 

208.1 

208.4 

58 

208.8 

209.2 

209.5 

209.9 

210.2 

210.6 

211.  0 

211.3 

211.7 

212.0 

59 

212.4 

212.8 

213.1 

213.5 

213.8 

214.2 

214.6 

214.9 

215.3 

215.6 

TABLE   56, 

KILOMETRES    PER    HOUR    INTO    METRES    PER    SECOND. 

10 
i  kilometre  per  hour  =  —  metres  per  second. 


Kilometres 
per  hour. 

0 

1 

2 

3 

4 

5 

6 

7 

8 

9 

metres 

metres 

metres 

metres 

metres 

metres 

metres 

metres 

metres 

metres 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

0 

0.00 

0.28 

0.56 

0.83 

I.  II 

i-39 

1.67 

1.94 

2.22 

2.50 

10 

2.78 

3.06 

3-33 

3-61 

3.89 

4.17 

4-44 

4.72 

5-00 

5-28 

20 

5.56 

5.83 

6.II 

6-39 

6.67 

6.94 

7.22 

7-50 

7-78 

8.06 

30 

8-33 

8.61 

8.89 

9.17 

9-44 

9.72 

10.00 

10.28 

10.56 

10.83 

40 

II.  II 

H.39 

11.67 

11.94 

12.22 

12.50 

12.78 

13.06 

13.33 

13.61 

50 

13.89 

14.17 

14.44 

14.72 

15.00 

15.28 

15.56 

15.83 

16.11 

16.39 

60 

16.67 

16.94 

17.22 

17.50 

17.78 

18.06 

18.33 

18.61 

18.89 

19.17 

70 

19.44 

19.72 

20.00 

20.28 

20.56 

20.83 

21.  II 

21.39 

21.67 

21.94 

80 

22.22 

22.50 

22.78 

23.06 

23.33 

23-61 

23.89 

24.17 

24.44 

24.72 

90 

25.00 

25.28 

25.56 

25-83 

26.11 

26.39 

26.67 

26.94 

27.22 

27.50 

100 

27.78 

28.06 

28.33 

28.61 

28.89 

29.17 

29.44 

29.72 

30.00 

30.28 

no 

30.56 

30.83 

31.11 

3L39 

31.67 

31.94 

32.22 

32.50 

32.78 

33.06 

120 

33-33 

33.6i 

33.89 

34.17 

34-44 

34-72 

35-00 

35-28 

35.56 

35.83 

130 

36.11 

36.39 

36.67 

36.94 

37-22 

37.50 

37.78 

38.06 

38.33 

38-61 

140 

38.89 

39.17 

39-44 

39.72 

40.00 

40.28 

40.56 

40-83 

41.11 

41-39 

150 

41.67 

41.94 

42.22 

42.50 

42.78 

43.06 

43-33 

43.61 

43.89 

44.17 

160 

44.44 

44.72 

45.00 

45.28 

45.56 

45.83 

46.11 

46.39 

46.67 

46.94 

170 

47.22 

47-50 

47.78 

48.06 

48.33 

48.61 

48.89 

49.17 

49-44 

49.72 

180 

50.00 

50.28 

50.56 

50.83 

51.11 

51.39 

51-67 

51-94 

52.22 

52.50 

190 

52.78 

53-06 

53-33 

53.6i 

53.89 

54.17 

54-44 

54.72 

55-00 

55.28 

SMITHSONIAN  TABLES. 


159 


TABLE  57. 


BEAUFORT   WIND    SCALE    AND    ITS    CONVERSION    INTO 

VELOCITY. 


Grade. 

Designation. 

Velocity  in  miles  per  hour. 

a 

b 

c 

d 

e 

o 

Calm. 

o 

3-3* 

0 

0 

3 

i 

Light  air. 

7 

6.6 

2 

i 

8 

2 

Light  breeze. 

14 

10.0 

4 

4 

13 

3 

Gentle  breeze. 

21 

17.5 

8 

10 

18 

4 

Moderate  breeze. 

28 

25.0 

16 

17 

23 

5 

Fresh  breeze. 

35 

32.5 

24 

24 

28 

6 

Strong  breeze. 

42 

40.0 

32 

32 

34 

7 

Moderate  gale. 

49 

47-5 

40 

40 

40 

8 

Fresh  gale. 

56 

55-0 

50 

48 

48 

9 

Strong  gale. 

63 

62.5 

62 

56 

56 

10 

Whole  gale. 

70 

70.0 

78 

67 

65 

ii 

Storm. 

77 

77-5 

96 

82 

75 

12 

Hurricane. 

84 

85.0 

120 

100 

90 

*  Velocity  3.3  is  assigned  to  0.5  grade. 

(a.}  COI,ONBI/  SIR  HENRY  JAMES  :  Instructions  for  taking  meteorological  obser- 
vations ;  with  tables  for  their  correction  and  notes  on  meteorological  phenomena. 
8vo.  Land.,  1860. 

(d.}  GEORGE  NEUMAYER  :  Discussion  of  the  meteorological  and  magnetical 
observations  made  at  the  Flagstaff  Observatory,  Melbourne,  during  the  years  1858  to 
1863.  4to.  Mannheim,  1867. 

(c.)  J.  K.  LAUGHTON  :  Physical  geography  and  its  relation  to  the  prevailing 
winds  and  currents.  8vo.  Lond.,  1870.  2d  ed.,  8vo.  Lond.,  1873. 

(d.}  C.  A.  SCHOTT  :  Meteorological  observations  in  the  Arctic  seas.  By  Sir  Francis 
Leopold  McClintock,  R.  N.  Made  on  board  the  Arctic  searching  yacht  "Fox,"  in 
Baffin  Bay  and  Prince  Regent's  Inlet,  in  1857,  1858  and  1859.  Reduced  and  discussed 
by  Charles  A.  Schott.  Smithsonian  Contributions  to  Knowledge,  146.  Washington, 
1862. 

(e.}  ROBERT  H.  SCOTT:  An  attempt  to  establish  a  relation  between  the  velocity 
of  the  wind  and  its  force  (Beaufort  scale).  Quarterly  Journal  Meteorological  Society, 
Lond.,  1874-' 75,  ii,  p.  109-123. 

Instructions  in  the  use  of  meteorological  instruments.  Compiled  by  direction  of 
the  Meteorological  Committee.  8vo.  Lond.,  1877. 


160 


GKODETICAL   TABLES. 

Relative  acceleration  of  gravity  at  different  latitudes     .     .     .  TABLE  58 

Length  of  one  degree  of  the  meridian  at  different  latitudes  .     .  TABLE  59 

Length  of  one  degree  of  the  parallel  at  different  latitudes     .     .  TABLE  60 

Duration  of  sunshine  at  different  latitudes     ........  TABLE  61 

Decimation  of  the  sun  for  the  year  1894     ........  TABLE  62 

Relative  intensity  of  solar  radiation  at  different  latitudes  for 

the  first  and  sixteenth  day  of  each  month   ......  TABLE  63 


161 


TABLE  58. 

RELATIVE  ACCELERATION    OF  GRAVITY  AT   DIFFERENT   LATITUDES. 

Ratio  of  the   acceleration  of  gravity  at  sea    level  for  each    10'  of   latitude,  to 
its  acceleration  at  latitude  45°. 
g$ 

— -    =  1  —  0.002662  COS  2<f> 
£-45 


Latitude. 

0' 

10' 

20' 

30' 

40' 

50' 

0° 

0-997  338 

0-997  338 

0-997  338 

0-997  338 

0-997  339 

0.997  339 

i 

340 

340 

34i 

342 

343 

344 

2 

345 

346 

347 

348 

350 

3 

353 

356 

358 

360 

362 

4 

364 

366 

368 

37i 

373 

376 

5 

0.997378 

0-997  381 

0-997  384 

0-997  387 

0.997  390 

0-997  393 

6 

396 

399 

403 

406 

410 

413 

7 

417 

421 

425 

429 

433 

437 

8 

441 

445 

450 

454 

459 

564 

9 

468 

473 

478 

483 

488 

493 

10 

0.997499 

0-997  504 

0.997  509 

0.997515 

0.997520 

0-997  526 

ii 

532 

538 

556 

562 

12 

568 

574 

581 

587 

594 

601 

13 

607 

614 

621 

628 

635 

642 

14 

650 

657 

664 

672 

679 

687 

15 

0-997  695 

0.997  702 

0.997  710 

0-997  7i8 

0.997  726 

0.997  734 

16 

742 

751 

759 

767 

776 

786 

II 

793 
846 

802 
856 

811 
865 

819 

•  874 

828 
883 

837 
893 

19 

902 

912 

922 

931 

941 

951 

20 

21 

0.997  961 

0.998  022 

0-997  97i 
0.998  032 

0.997  981 
0.998  043 

0.997  991 
0.998  053 

0.998  ooi 
064 

0.998011 
074 

22 

085 

096 

107 

1x8 

129 

140 

23 

151 

162 

173 

185 

196 

207 

24 

219 

230 

242 

254 

265 

277 

25 

0.998  289 

0.998  301 

0.998313 

0.998325 

0.998337 

0.998  349 

26 
27 

361 

435 

448 

386 
460 

398 
473 

410 
486 

423 
499 

28 

524 

537 

550 

563 

576 

29 

589 

603 

616 

629 

642 

656 

30 

0.998  669 

0.998  682 

9.998696 

0.998  709 

0.998  723 

0.998  737 

31 

750 

764 

778 

791 

805 

819 

32 

833 

847 

861 

875 

889 

903 

33 

917 

946 

960 

974 

988 

34 

0.999003 

0.999017 

0.999032 

0.999  046 

0.999  °6° 

0.999075 

35 

0.999090 

0.999  !04 

0.999119 

o.999  133 

0.999  148 

0.999  163 

36 

177 

192 

207 

222 

237 

251 

37 

266 

281 

296 

311 

326 

34i 

38 

356 

371 

386 

401 

416 

39 

447 

462 

477 

492 

507 

523 

40 

0.999538 

0.999553 

0.999  568 

0-999  584 

0-999599 

0.999  614 

41 

630 

645 

660 

676 

691 

706 

42 

722 

737 

753 

768 

783 

799 

43 

814 

830 

845 

86  1 

876 

892 

44 

907 

923 

938 

954 

970 

985 

45 

I.OOO  000 

i.ooo  015 

1.000030 

i.ooo  046 

1.000062 

i.ooo  077 

SMITHSONIAN  TABLES. 


162 


~  TABLE  58. 
RELATIVE  ACCELERATION    OF  GRAVITY  AT  DIFFERENT   LATITUDES. 

Ratio  of  the   acceleration  of  gravity  at  sea  level  for  each  10'  of  latitude,  to 
its  acceleration  at  latitude  45°. 

— —  =  I  —  O.O02662  COS  2  <j> 
£•45 


Latitude. 
* 

0' 

10' 

20' 

30' 

40' 

50' 

45° 

I.OOOOOO 

1.000015 

i.ooo  030 

i.ooo  046 

1.000062 

i.ooo  077 

46 

093 

108 

124 

139 

155 

170 

47 

1  86 

201 

217 

232 

247 

263 

48 

278 

294 

309 

324 

340 

355 

49 

370 

386 

401 

416 

432 

447 

50 

1.000462 

1.000477 

i.ooo  493 

1.000508 

i.ooo  523 

i.ooo  538 

5i 

553 

569 

584 

599 

614 

629 

52 

644 

659 

674 

689 

704 

719 

53 

734 

749 

763 

778 

808 

54 

823 

837 

852 

867 

881 

896 

55 

i.ooo  910 

i.ooo  925 

i.ooo  940 

i.ooo  954 

.  i.ooo  968 

i.ooo  983 

56 

0997 

I  012 

1026 

1040 

1054 

1069 

57 

1083 

1097 

I  III 

1125 

1139 

1153 

58 

1  167 

1181 

1195 

i  209 

1222 

1236 

59 

1250 

1263 

1277 

i  291 

1304 

1318 

60 

i.ooi  331 

i.ooi  344 

i.ooi  358 

i.ooi  371 

i.ooi  384 

i.ooi  397 

61 

1411 

1424 

1437 

1450 

1463 

1476 

62 

1489 

1501 

1514 

1527 

1540 

1552 

63 

1565 

1577 

1590 

1602 

I  614 

1627 

64 

J639 

1651 

1663 

1675 

1687 

1699 

65 

i.ooi  711 

i.ooi  723 

i.ooi  735 

i.ooi  746 

i.ooi  758 

i.ooi  770 

66 

1781 

1793 

1804 

1815 

1827 

1838 

67 

1849 

1860 

1871 

1882 

1893 

1904 

68 

1915 

i  926 

1936 

1947 

1957 

1968 

69 

1978 

1989 

1999 

2009 

2019 

2029 

70 

1.002  039 

1.002  049 

1.002  059 

1.002  069 

1.002  078 

1.002  088 

7i 

2098 

2  107 

2117 

2  126 

2135 

2144 

72 

2154 

2163 

2  172 

2181 

2  189 

2198 

73 

2207 

2216 

2224 

2233 

2  241 

2249 

74 

2258 

2266 

2274 

2282 

2290 

2298 

75 

1.002  305 

1.002  313 

1.002  321 

1.002  328 

1.002  336 

1.002  343 

76 

2350 

2358 

2365 

2372 

2379 

2386 

77 

2393 

2399 

2  406 

2413 

2419 

2426 

78 

2432 

2438 

2444 

2450 

2456 

2462 

79 

2468 

2474 

2480 

2485 

2491 

2496 

80 

1.002  501 

1.002  507 

I.O02  512 

1.002  517 

I.OO2  522 

1.002  527 

81 

2532 

2536 

2541 

2546 

2550 

2555 

82 

2559 

2563 

2567 

2571 

2575 

2579 

83 

2583 

2587 

2590 

2594 

2597 

2601 

84 

2604 

2607 

26lO 

2613 

26l6 

2619 

85 

1.002  622 

1.002  624 

I.O02  627 

I.OO2  629 

1.002  632 

1.002  634 

86 

2636 

2638 

2640 

2642 

2644 

2  646 

87 

2647 

2649 

2650 

2652 

2653 

2654 

88 

2655 

2656 

2657 

2658 

2659 

2660 

89 

2660 

2661 

2661 

2662 

2662 

2662 

SMITHSONIAN  TABLES. 


163 


TABLE  59.    ' 

LENGTH    OF   ONE    DEGREE    OF   THE    MERIDIAN    AT   DIFFERENT 

LATITUDES.  ftb/-S) 


Latitude. 

Metres. 

Statute 
Miles. 

Geographic 
Miles. 
1'  of  the  Eq. 

Latitude. 

Metres. 

Statute 
Miles. 

Geographic 
Miles. 
1'  of  the  Eq. 

0° 

110568.5 

68.703 

59-594 

45° 

in  132.1 

69.054 

59-898 

i 

110568.8 

68.704 

59.594 

46 

111151.9 

69.067 

59.908 

2 

110569.8 

68.705 

59-595 

47 

in  171.6 

69.079 

59-9I9 

3 

H057I.5 

68.706 

59.596 

48 

111191.3 

69.091 

59.929 

4 

II0573-9 

68.707 

59-597 

49 

111210.9 

69.103 

59.940 

5 

110577.0 

68.709 

59.598 

50 

111230.5 

69.115 

59-951 

6 

110580.7 

68.711 

59.600 

5i 

111249.9 

69.127 

59.961 

7 

110585.1 

68.714 

59-603 

52 

111269.2 

69-I39 

59-972 

8 

110590.2 

68.717 

59.606 

53 

111288.3 

69.151 

59-982 

9 

II0595-9 

68.721 

59.609 

54 

111307.3 

69.163 

59-992 

10 

110602.3 

68.725 

59.612 

55 

111326.0 

69.175 

60.002 

ii 

110609.3 

68.729 

59.616 

56 

IH344-5 

69.186 

60.012 

12 

110617.0 

68.734 

59.620 

57 

111362.7 

69.198 

60.022 

13 

110625.3 

68.739 

59-625 

58 

111380.7 

69.209 

60.032 

14 

110634.2 

68.745 

59.629 

59 

111398-4 

69.  220 

60.041 

15 

110643.7 

68.751 

59-634 

60 

111415.7 

69.230 

60.051 

16 

110653.8 

68.757 

59.640 

61 

111432.7 

69.241 

60.060 

17 

110664.5 

68.763 

59.646 

62 

111449.4 

69.251 

60.069 

18 

110675.7 

68.770 

59-652 

63 

111465.7 

69.261 

60.077 

19 

110687.5 

68.778 

59-658 

64 

111481.5 

69.271 

60.086 

20 

110699.9 

68.786 

59-665 

65 

III497-0 

69.281 

60.094 

21 

110712.8 

68.794 

59-672 

66 

111512.0 

69.  290 

60.  1  02 

22 

110726.2 

68.802 

59-679 

67 

111526.5 

69.299 

60.  no 

23 

1  10  740.  i 

68.810 

59.686 

68 

111540.5 

69.308 

60.118 

24 

110754.4 

68.819 

59-694 

69 

IH554.I 

69.316 

60.125 

25 

110769.2 

68.829 

59.702 

70 

111567.1 

69.324 

60.132 

26 

110784.5 

68.838 

59-7io 

7i 

111579.7 

69.332 

60.139 

27 

110800.2 

68.848 

59-7I9 

72 

111591.6 

69.340 

60.145 

28 

110816.3 

68.858 

59-727 

73 

111603.0 

69.347 

60.151 

29 

110832.8 

68.868 

59-736 

74 

111613.9 

69.354 

60.157 

30 

1  10  849.  7 

68.879 

59-745 

75 

111624.1 

69.360 

60.  163 

3i 

110866.9 

68.889 

59-755 

76 

111633.8 

69.366 

60.168 

32 

110884.4 

68.900 

59.764 

77 

111642.8 

69.372 

60.173 

33 

110902.3 

68.911 

59-774 

78 

111651.2 

69.377 

60.177 

34 

110920.4 

68.923 

59.784 

79 

111659.0 

69-382 

60.  182 

35 

110938.8 

68.934 

59-794 

80 

111666.2 

69.386 

60.186 

36 

110957.4 

68.946 

59-804 

81 

111672.6 

69.390 

60.  189 

37 

110976.3 

68.957 

59.8i4 

82 

111678.5 

69.394 

60.192 

38 

110995.3 

68.969 

59-824 

83 

111683.6 

69.397 

60.195 

39 

111014.5 

68.981 

59-834 

84 

in  688.  i 

69.400 

60.197 

40 

111033.9 

68.993 

59-845 

85 

111691.9 

69.402 

60.199 

4i 

111053.4 

69.005 

59.855 

86 

111695.0 

69.404 

60.201 

42 

111073.0 

69.017 

59-866 

87 

111697.4 

69.405 

60.202 

43 

111092.6 

69.029 

59-876 

88 

111699.2 

69-407 

60.203 

44 

in  112.4 

69.042 

59-887 

89 

111700.2 

69.407 

60.204 

45 

111132.1 

69.054 

59-898 

90 

111700.6 

69.407 

60.204 

SMITHSONIAN  TABLES. 


164 


TABLE  60. 


LENGTH    OF   ONE    DEGREE    OF   THE    PARALLEL   AT    DIFFERENT 

LATITUDES. 


Latitude. 

Metres. 

Statute 
Miles. 

Geographic 
Miles. 
1'oftheEq. 

Latitude. 

Metres. 

Statute 
Miles. 

Geographic 
Miles. 
1'  of  the  Eq. 

0° 

111321.9 

69.171 

.  6o.OOO 

45° 

78850.0 

48.995 

42.498 

i 

111305.2 

69.162 

59.991 

46 

77466.5 

48.135 

4L753 

2 

111254.6 

69.130 

59.964 

47 

76059.2 

47.261 

40.994 

3 

111170.4 

69.078 

59.918 

48 

74628.5 

46.372 

40.223 

4 

111052.6 

69.005 

59.855 

49 

73  174-9 

45-469 

39-440 

5 

110901.2 

68.911 

59-773 

50 

71  698.9 

44-552 

38.644 

6 

110716.2 

68.796 

59.673 

5i 

70200.8 

43.621 

37.837 

7 

110497.7 

68.660 

59.556 

52 

68681.1 

42.676 

37-018 

8 

110245.8 

68.503 

59.420 

53 

67  140.3 

41.719 

36.187 

9 

109960.5 

68.326 

59-266 

54 

65578.8 

40.749 

35.346 

10 

109641.9 

68.128 

59.095 

55 

63997.1 

39.766 

34-493 

ii 

109  290.  i 

67.909 

58.905 

56 

62395.7 

38.771 

33-630 

12 

108905.2 

67.670 

58.697 

57 

60775.1 

37.764 

32.757 

13 

108487.3 

67.411 

58.472 

58 

59135.7 

36.745 

31.873 

14 

108036.6 

67.131 

58.229 

59 

57478.1 

35.715 

30.979 

15 

I07553-I 

66.830 

57.969 

60 

55802.8 

34.674 

30.076 

16 

107037.0 

66.510 

57.690 

61 

54110.2 

33.622 

29.164 

17 

106488.5 

66.169 

57-395 

62 

52400.9 

32.560 

28.243 

18 

105907.7 

65.808 

57.082 

63 

50675.4 

31.488 

27.313 

19 

105294.7 

65.427 

56.751 

64 

48934.3 

30.406 

26.374 

20 

104649.8 

65.026 

56.404 

65 

47  178.0 

29-315 

25.428 

21 

103973.2 

64.606 

56.039 

66 

45407.1 

28.215 

24-473 

22 

103  265.0 

64.166 

55.657 

67 

43622.2 

27.  1  06 

23-511 

23 

102525.4 

63.706 

55.259 

68 

41  823.8 

25-988 

22.542 

24 

101  754.6 

63.227 

54.843 

69 

40012.4 

24.862 

21.566 

25 

!00  953-  0 

62.729 

54.4H 

70 

38  188.6 

23.729 

20.583 

26 

100  1  20.  6 

62.212 

53.963 

7i 

36353.0 

22.589 

19.593 

27 

99257.8 

61.676 

53.498 

72 

34506.2 

21.441 

18.598 

28 

98364.8 

61.121 

53-016 

73 

32  648.6 

20.287 

17.597 

29 

97441.9 

60.548 

52.519 

74 

30780.9 

19.126 

16.590 

30 

96489.3 

59-956 

52.006 

75 

28903.6 

17.960 

15.578 

3i 

05507.3 

59-345 

51.476 

76 

27017.4 

16.788 

14.562 

32 

94496.2 

58.717 

50.931 

77 

25122.8 

15.611 

I3.54I 

33 

93456.3 

58.071 

50.371 

78 

23  220.4 

14.428 

12.515 

34 

92  387-9 

57.407 

49-795 

79 

21310.8 

13-242 

11.486 

35 

91  291.3 

56.726 

49.204 

80 

19394.6 

12.051 

10.453 

36 

90166.8 

56.027 

48.598 

81 

17472.4 

10.857 

9.417 

37 

89014.8 

55.311 

47-977 

82 

15544.7 

9-659 

8.378 

38 

87835.6 

54.578 

47.341 

83 

13612.2 

8.458 

7.337 

39 

86629.6 

53-'829 

46.691 

84 

11675.5 

7.255 

6.293 

40 

85397.0 

53-063 

46.027 

85 

9735-1 

6.049 

5.247 

4i 

84  138.4 

52.281 

45-349 

86 

7791.7 

4.841 

4.200 

42 

82  854.0 

51-483 

44.656 

87 

5845-9 

3.632 

3.i5i 

43 

81  544-2 

50.669 

43-950 

88 

3898.3 

2.422 

2.IOI 

44 

80209.4 

49.840 

43-231 

89 

1949.4 

1.  211 

I.05I 

45 

78850.0 

48.995 

42.498 

90 

0.0 

O.OOO 

0.000 

SMITHSONIAN  TABLES. 


165 


TABLE   61. 

DURATION    OF   SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 
of 
the  Sun. 

LATITUDE  NORTH. 

0° 

5° 

10° 

15° 

20° 

25° 

30° 

35° 

40° 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

-23°27/ 

12  7 

II  50 

II  32 

II  14 

10  55 

10  35 

10  13 

9  48 

9  19 

—  23  20 

12  7 

II  50 

II  32 

II  14 

10  56 

10  36 

10  14 

9  49 

9  20 

-23  o 

12  7 

II  50 

ii  33 

II  15 

10  57 

10  37 

10  15 

9  5i 

9  23 

-22  40 

12  7 

II  50 

ii  33 

ii  16 

10  58 

10  38 

10  17 

9  53 

9  26 

—  22  20 

12  7 

II  51 

ii  34 

ii  17 

10  59 

10  40 

10  19 

9  55 

9  29 

—  22   0 

12  7 

II  51 

ii  34 

ii  18 

II   0 

10  41 

10  20 

9  58 

9  3i 

-21  40 

12  7 

II  51 

ii  35 

ii  19 

ii  i 

10  43 

10  22 

10   0 

9  34 

—  21  20 

12  7 

II  52 

ii  35 

ii  19 

II   2 

10  44 

10  24 

10   2 

9  37 

-21   0 

12  7 

II  52 

ii  36 

II  20 

ii  4 

10  46 

10  26 

10  4 

9  40 

-2040 

12  7 

II  52 

ii  37 

II  21 

ii  5 

10  47 

10  28 

10  6 

9  42 

—  20  20 

12  7 

II  52 

ii  37 

II  22 

ii  6 

10  49 

10  29 

10  8 

9  45 

—  20   0 

12  7 

ii  53 

ii  38 

II  23 

ii  7 

10  50 

10  31 

10  II 

9  47 

-19  40 

12  7 

ii  53 

ii  38 

II  23 

ii  8 

10  51 

10  33 

10  13 

9  50 

—  19  20 

12  7 

ii  53 

ii  39 

II  24 

ii  9 

10  53 

10  35 

10  15 

9  53 

—  19  o 

12  7 

ii  53 

ii  39 

II  25 

II  10 

10  54 

10  37 

10  17 

9  55 

-18  40 

12  7 

ii  54 

ii  40 

II  26 

ii  ii 

10  55 

10  38 

10  19 

9  58 

—  18  20 

12  7 

ii  54 

ii  40 

II  27 

II  12 

10  57 

10  40 

10  21 

10   I 

—  18  o 

12  7 

ii  54 

ii  41 

II  28 

II  13 

10  58 

10  42 

10  23 

10  3 

-17  40 

12  7 

ii  54 

ii  41 

II  28 

II  14 

10  59 

10  43 

10  26 

10  5 

—  17  20, 

12  7 

ii  55 

ii  42 

II  29 

II  15 

ii  i 

10  45 

10  28 

10  8 

-17  o 

12  7 

ii  55 

ii  42 

II  30 

ii  16 

II   2 

10  47 

10  30 

IO  IO 

-16  40 

12  7 

ii  55 

ii  43 

II  31 

ii  17 

ii  4 

10  49 

10  32 

10  13 

—  16  20 

12  7 

ii  55 

ii  43 

II  31 

ii  18 

ii  5 

10  50 

10  34 

10  16 

—  16  o 

12  7 

ii  56 

ii  44 

II  32 

ii  19 

ii  6 

10  52 

10  36 

10  18 

-15  40 

12  7 

ii  56 

ii  44 

ii  33 

II  20 

ii  8 

10  53 

10  38 

10  20 

—  15  20 

12  7 

ii  56 

ii  45 

ii  34 

II  21 

ii  9 

10  55 

10  40 

10  23 

-15  o 

12  7 

ii  56 

ii  45 

ii  34 

II  22 

II  10 

10  57 

10  42 

10  25 

-14  40 

12  7 

ii  57 

ii  46 

ii  35 

II  23 

ii  ii 

10  59 

10  44 

10  28 

—  14  20 

12  7 

ii  57 

ii  46 

ii  36 

II  25 

ii  13 

II   0 

10  46 

10  30 

—  14  o 

12  7 

ii  57 

ii  47 

ii  37 

II  26 

ii  14 

II   2 

10  48 

10  32 

-13  40 

—  13  20 

12  7 
12  7 

ii  57 

ii  58 

ii  47 

ii  48 

ii  37 
ii  38 

II  27 

II  28 

ii  16 
ii  17 

ii  4 
ii  5 

10  50 

10  52 

10  35 
10  37 

-13  o 

12  7 

ii  58 

ii  48 

ii  39 

II  29 

ii  18 

ii  7 

10  54 

10  40 

-12  40 

12  7 

ii  58 

ii  49 

ii  40 

II  30 

ii  19 

ii  8 

10  56 

10  42 

—  12  20 

12  7 

ii  58 

ii  49 

ii  40 

II  31 

II  21 

II  10 

10  58 

10  44 

—  12   0 

12  7 

ii  58 

ii  50 

ii  41 

II  32 

II  22 

ii  ii 

II   0 

1047 

-II  40 

12  7 

ii  59 

ii  50 

ii  42 

ii  33 

II  23 

ii  13 

II   2 

10  49 

—  IT  2O 

12  7 

ii  59 

ii  5i 

ii  43 

ii  34 

II  25 

ii  15 

ii  4 

10  52 

—  II   O 

12  7 

ii  59 

ii  5i 

ii  43 

ii  35 

II  26 

ii  16 

ii  6 

10  54 

-10  40 

12  7 

ii  59 

ii  52 

ii  44 

ii  36 

II  27 

ii  18 

ii  8 

10  56 

—  10  20 

12  7 

12   0 

ii  52 

ii  45 

ii  37 

II  28 

II  20 

II  10 

10  59 

—  IO   O 

12  7 

12   0 

ii  53 

ii  46 

ii  38 

II  30 

II  21 

II  12 

ii  i 

-  9  40 

12  7 

12   0 

ii  53 

ii  46 

ii  39 

II  31 

II  23 

II  14 

ii  3 

—  9  20 

12  7 

12   0 

ii  54 

ii  47 

ii  40 

II  32 

II  24 

ii  16 

ii  5 

-  9  o 

12  7 

12   I 

ii  54 

ii  47 

ii  41 

ii  34 

II  26 

ii  17 

ii  8 

-  8  40 

12  7 

12   I 

ii  55 

ii  48 

ii  42 

ii  35 

II  28 

ii  19 

II  10 

—  8  20 

12  7 

12   I 

ii  55 

ii  49 

ii  43 

ii  36 

II  29 

II  21 

II  12 

-  8  o 

12  7 

12   I 

ii  56 

ii  50 

ii  44 

ii  37 

II  31 

II  23 

II  14 

SMITHSONIAN  TABLES. 


1 66 


TABLE  61, 
DURATION    OF   SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 
of 
the  Sun. 

I,ATITUDE  NORTH. 

42° 

44° 

46° 

48° 

50° 

52° 

54° 

56° 

58° 

60° 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  111. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

-23°27/ 

9  7 

853 

8  38 

8  22 

8  4 

7  44 

7  22 

6  56 

627 

5  52 

—  23  20 

9  8 

8  54 

8  39 

8  23 

8  5 

7  45 

7  24 

6  58 

6  29 

5  54 

-23  o 

9  ii 

8  58 

843 

8  28 

8  io 

'  7  50 

7  29 

7  4 

6  36 

6  2 

-22  40 

9  14 

9  i 

8  46 

831 

8  14 

7  55 

7  34 

7  io 

6  43 

6  9 

—  22  20 

9  17 

9  4 

8  50 

835 

8  18 

8  o 

7  39 

7  16 

6  49 

617 

—  22   0 

9  20 

9  7 

853 

8  38 

8  22 

8  4 

7  44 

7  22 

655 

625 

-21  40 

9  23 

9  io 

857 

8  42 

8  26 

8  9 

7  49 

7  27 

7  i 

632 

—  21  20 

9  26 

9  13 

9  i 

8  46 

8  30 

813 

7  54 

7  32 

7  8 

6  38 

—  21   0 

9  28 

9  17 

9  4 

8  50 

8  34 

8  18 

7  59 

738 

7  14 

6  46 

-20  40 

9  3i 

9  20 

9  7 

853 

8  38 

8  22 

8  4 

7  43 

7  20 

652 

—  20  20 

9  34 

9  23 

9  ii 

857 

8  42 

8  26 

8  8 

7  49 

7  25 

6  59 

—  20   0 

937 

9  26 

9  14 

9  i 

8  46 

831 

8  13 

7  54 

7  3i 

7  5 

-19  40 

9  40 

9  29 

9  17 

9  4 

8  50 

835 

8  18 

7  59 

7  37 

7  12 

—  19  20 

9  43 

9  32 

9  20 

9  7 

8  54 

8  39 

823 

8  4 

7  43 

7  18 

—  19  o 

9  46 

9  35 

9  24 

9  ii 

8  58 

8  43 

827 

8  9 

7  48 

7  25 

-18  40 

948 

9  38 

9  27 

9  15 

9  2 

847 

832 

8  14 

7  54 

7  3i 

-IS  20 

9  5i 

9  4i 

9  30 

9  J9 

9  6 

852 

8  36 

8  19 

7  59 

7  37 

-18  o 

9  54 

9  44 

9  34 

9  22 

9  io 

8  56 

8  41 

8  24 

8  5 

7  43 

-17  40 

9  56 

9  47 

9  37 

9  25 

9  13 

9  o 

8  45 

8  29 

8  io 

7  49 

—  17  20 

9  59 

9  50 

9  40 

9  29 

9  17 

9  4 

8  50 

8  34 

8  15 

7  55 

-17  o 

10   2 

9  53 

9  43 

9  32 

9  21 

9  8 

8  54 

8  38 

8  20 

8  i 

-16  40 

10  5 

9  56 

9  46 

9  35 

9  25 

9  12 

8  58 

8  43 

8  26 

8  6 

—  16  20 

10  7 

9  59 

9  49 

9  39 

9  28 

9  16 

9  2 

8  47 

831 

8  12 

—  16  o 

IO  IO 

10   I 

9  52 

943 

9  32 

9  20 

9  7 

852 

8  36 

8  17 

-15  40 

10  12 

io  4 

9  55 

9  46 

9  35 

9  24 

9  ii 

857 

8  41 

8  23 

—  15  20 

10  15 

io  7 

9  58 

9  49 

9  39 

9  28 

9  15 

9  2 

8  46 

8  29 

-15  o 

10  18 

10  10 

IO   I 

9  52 

9  43 

9  3i 

9  19 

9  6 

851, 

8  34 

-14  40 

IO  2O 

io  13 

io  4 

9  56 

9  46 

9  35 

9  23 

9  ii 

8  56 

8  40 

—  14  20 

10  23 

io  16 

io  7 

9  59 

9  49 

9  39 

9  28 

9  15 

9  i 

8  45 

—  14  o 

10  26 

io  19 

10  10 

10   2 

9  53 

9  43 

9  32 

9  19 

9  6 

8  50 

-13  40 

10  28 

10  21 

io  13 

io  5 

9  56 

9  47 

9  36 

9  24 

9  ii 

8  56 

—  13  20 

10  31 

io  24 

io  16 

io  8 

10  0 

9  50 

9  4o 

9  28 

9  16 

9  i 

-13  o 

io  33 

io  26 

io  19 

IO  II 

io  3 

9  54 

9  44 

9  33 

9  20 

9  6 

-12  40 

10  36 

io  29 

IO  22 

io  15 

io  7 

9  58 

948 

9  37 

9  25 

9  ii 

—  12  20 

io  38 

io  32 

io  25 

io  18 

10  10 

10   I 

9  52 

9  4i 

9  30 

9  17 

—  12   0 

10  41 

io  35 

10  28 

IO  21 

io  13 

io  5 

9  56 

9  46 

9  35 

9  22 

-II  40 

io  44 

io  38 

io  31 

io  25 

io  17 

io  9 

10   0 

9  50 

9  39 

9  27 

—  II  20 

io  46 

io  40 

io  34 

10  28 

10  20 

io  13 

io  4 

9  55 

9  44 

9  32 

—  II   0 

io  49 

io  43 

io  37 

io  31 

io  23 

io  16 

io  8 

9  59 

9  49 

9  37 

-10  40 

io  51 

io  46 

io  40 

io  34 

io  27 

io  19 

10  12 

io  3 

9  53 

9  42 

—  10  20 

io  53 

io  49 

io  43 

io  37 

io  31 

io  23 

io  16 

io  7 

9  58 

9  47 

—  10   0 

io  56 

io  51 

io  46 

io  40 

io  34 

io  27 

io  19 

10  II 

io  3 

9  52 

-  9  40 

io  59 

io  54 

io  49 

io  43 

io  37 

io  31 

io  23 

io  16 

io  7 

9  57 

—  9  20 

ii  i 

io  56 

io  52 

io  46 

io  40 

io  34 

io  27 

IO  2O 

10  II 

10   2 

-  9  o 

ii  3 

io  59 

io  55 

io  49 

io  44 

io  37 

io  31 

io  24 

io  16 

io  7 

-  8  40 

ii  6 

II   2 

io  57 

io  52 

io  47 

io  41 

io  34 

io  28 

10  20 

10  II 

—  8  20 

ii  8 

ii  4 

II   0 

io  55 

io  50 

io  44 

io  38 

io  32 

io  25 

io  16 

—  8  o 

II  10 

ii  7 

ii  3 

io  58 

io  53 

io  48 

io  42 

io  36 

io  29 

10  21 

SMITHSONIAN  TABLES. 


167 


TABLE  61. 

DURATION    OF   SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 
of 
the  Sun. 

LATITUDE  NORTH. 

0° 

5° 

10° 

15° 

20° 

25° 

30° 

35° 

40° 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  111. 

h.  m. 

h.  m. 

-8°  0' 

12  7 

12   I 

ii  55 

II  50 

II  44 

II  37 

II  3I 

II  23 

II  14 

-7  40 

12  7 

12   I 

ii  56 

II  50 

ii  45 

II  38 

II  32 

II  25 

II  17 

-7  20 

12  7 

12   I 

ii  56 

II  51 

II  46 

II  40 

ii  34 

II  27 

II  19 

—  7  o 

12  7 

12   2 

ii  5/ 

II  52 

ii  47 

II  41 

ii  35 

II  29 

II  22 

-6  40 

12  7 

12   2 

ii  57 

ii  53 

ii  48 

II  42 

ii  37 

II  31 

II  24 

—  6  20 

12  7 

12   2 

ii  58 

ii  53 

ii  49 

ii  43 

ii  38 

II  32 

II  26 

-6  o 

12  7 

12   2 

ii  58 

ii  54 

ii  50 

ii  45 

ii  40 

ii  34 

II  28 

-5  40 

12  7 

12  3 

ii  59 

ii  55 

ii  51 

ii  46 

ii  41 

ii  36 

II  3I 

-5  20 

12  7 

12  3 

ii  59 

ii  55 

ii  52 

ii  47 

ii  43 

ii  38 

ii  33 

—  —  c   o 

12  7 

12  3 

12   0 

ii  56 

ii  53 

ii  49 

ii  44 

ii  40 

ii  35 

-4  40 

12  7 

12  3 

12   0 

ii  57 

ii  54 

ii  50 

ii  46 

ii  42 

ii  37 

—  4  20 

12  7 

12  4 

12   I 

ii  58 

ii  55 

ii  51 

ii  47 

ii  44 

ii  40 

-4  o 

12  7 

12  4 

12   I 

ii  58 

ii  56 

ii  52 

ii  49 

ii  46 

ii  42 

-3  40 

-3  20 

12  7 
12  7 

12  4 
12  4 

12   2 
12   2 

ii  59 

12   0 

ii  57 
ii  58 

ii  53 

ii  55 

ii  52 

ii  47 
ii  49 

ii  44 
ii  46 

—  3  o 

12  7 

12  5 

12  3 

12   I 

ii  58 

ii  56 

ii  54 

ii  51 

ii  49 

-2  40 

12  7 

12  5 

12  3 

12   I 

ii  59 

ii  58 

ii  55 

ii  53 

ii  5i 

—  2  20 
—  2   0 

12  7 
12  7 

12  5 
12  5 

12  4 
12  4 

12   2 

12  3 

12  0 
12   I 

ii  59 

12  0 

ii  57 
ii  58 

ii  55 
ii  57 

ii  53 
ii  55 

-1  40 

12  7 

12  5 

12  4 

12  4 

12   2 

12   I 

12   0 

ii  59 

ii  58 

—  I  20 

12  7 

12   6 

12  5 

12  4 

12  3 

12   2 

12   2 

12   I 

12   0 

—  I   0 

12  7 

12   6 

12  5 

12  5 

12  4 

12  4 

12  3 

12   2 

12   2 

-0  40 

12  7 

12   6 

12   6 

12  5 

12  5 

12  5 

12  5 

12  4 

12  4 

—  0  20 

12  7 

12   6 

12   6 

12   6 

12   6 

12   6 

12  6 

12   6 

12  7 

0  0 

12  7 

12  7 

12  7 

12  7 

12  7 

12  7 

12   8 

12   8 

12  9 

+  0  20 

12  7 

12  7 

12  7 

12   8 

12  8 

12   8 

12  9 

12  10 

12  II 

o  40 

12  7 

12  7 

12  8 

12   8 

12   9 

12  10 

12  II 

12  12 

12  13 

1  0 

12  7 

12  7 

12   8 

12  9 

12  10 

12  II 

12  13 

12  14 

12  15 

I  20 

12  7 

12   8 

12  9 

12  10 

12  II 

12  13 

12  14 

12  16 

12  17 

I  40 

12  7 

12  8 

12  9 

12  10 

12  12 

12  14 

12  l6 

12  17 

12  2O 

2  0 

12  7 

12   8 

12  IO 

12  II 

12  13 

12  15 

12  17 

12  19 

12  22 

2  20 

12  7 

12   8 

12  10 

12  12 

12  14 

12  l6 

12  19 

12  21 

12  25 

2  40 

12  7 

12  9 

12  II 

12  13 

12  15 

12  17 

12  20 

12  23 

12  27 

3  0 

12  7 

12  9 

12  II 

12  13 

12  l6 

12  19 

12  22 

12  25 

12  29 

3  20 

12  7 

12  9 

12  12 

12  14 

12  17 

12  20 

12  23 

12  27 

12  31 

3  40 

12  7 

12  9 

12  12 

12  15 

12  18 

12  21 

12  25 

12  29 

12  33 

4  0 

12  7 

12  10 

12  13 

12  l6 

12  19 

12  22 

12  26 

12  31 

12  35 

4  20 

12  7 

12  10 

12  13 

12  l6 

12  20 

12  23 

12  28 

12  32 

12  38 

4  40 

12  7 

12  10 

12  14 

12  17 

12  21 

12  25 

12  29 

12  34 

12  40 

5  0 

12  7 

12  10 

12  14 

12  18 

12  22 

12  26 

12  31 

12  36 

12  43 

5  20 

12  7 

12  10 

12  15 

12  19 

12  23 

12  28 

12  32 

12  38 

12  45 

5  40 

12  7 

12  II 

12  15 

12  19 

12  24 

12  29 

12  34 

12  40 

12  47 

6  0 

12  7 

12  II 

12  l6 

12  20 

12  25 

12  30 

12  35 

12  42 

12  49 

6  20 

12  7 

12  II 

12  16 

12  21 

12  26 

12  31 

12  37 

12  44 

12  52 

6  40 

12  7 

12  II 

12  16 

12  22 

12  27 

12  32 

12  39 

12  46 

12  54 

7  0 

12  7 

12  12 

12  17 

12  22 

12  28 

12  34 

12  40 

12  48 

12  56 

7  20 

12  7 

12  12 

12  17 

12  23 

12  29 

12  35 

12  42 

12  50 

12  58 

7  40 

12  7 

12  12 

12  18 

12  23 

12  30 

12  36 

12  43 

12  52 

13   I 

8  0 

12  7 

12  13 

12  18 

12  24 

12  31 

12  38 

12  45 

12  53 

13  3 

SMITHSONIAN  TABLES. 


168 


TABLE  61 
DURATION    OF   SUNSHINE   AT    DIFFERENT    LATITUDES. 


Declination 
of 
the  Sun. 

IvATlTUDK  NORTH. 

42° 

44° 

46° 

48° 

50° 

52° 

54° 

56° 

58° 

60° 

h.  m. 

h.  m. 

h.  m. 

h.  in. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

-8°  O7 

II  II 

II  7 

ii  3 

II  58 

10  53 

10  48 

10  43 

10  36 

10  30 

10  21 

-7  40 

II  13 

II  IO 

ii  5 

II   I 

10  57 

10  52 

10  46 

10  40 

10  34 

10  26 

—  7  20 

ii  16 

II  12 

ii  8 

ii  4 

II   0 

10  55 

10  50 

10  44 

10  38 

10  31 

—  7  o 

ii  19 

II  15 

ii  ii 

ii  7 

ii  3 

10  59 

10  54 

10  48 

10  42 

10  35 

-6  40 

II  21 

II  17 

ii  14 

II  10 

ii  7 

II   2 

10  58 

10  52 

10  47 

10  40 

—  6  20 

II  23 

II  2O 

ii  17 

ii  13 

II  IO 

ii  5 

ii  i 

10  56 

10  51 

10  45 

-6  o 

II  26 

II  23 

ii  20 

ii  16 

ii  13 

ii  9 

ii  5 

II   0 

10  55 

10  50 

-5  40 

II  28 

II  25 

ii  23 

ii  19 

ii  16 

ii  13 

ii  8 

ii  4 

10  59 

10  55 

-5  20 

II  31 

II  28 

ii  25 

II  22 

ii  19 

ii  16 

ii  13 

ii  8 

ii  4 

10  59 

—  5  o 

ii  33 

II  31 

ii  28 

II  25 

ii  23 

ii  19 

ii  16 

JI  12 

ii  8 

ii  4 

-4  40 

ii  35 

ii  33 

ii  31 

II  28 

ii  26 

ii  23 

II  20 

ii  16 

ii  13 

ii  8 

—  4  20 

ii  38 

ii  36 

ii  34 

II  31 

ii  29 

ii  26 

ii  23 

II  20 

ii  17 

ii  13 

-4  o 

ii  40 

ii  38 

ii  37 

ii  34 

ii  32 

ii  30 

ii  27 

II  24 

II  21 

ii  18 

-3  40 

ii  43 

ii  41 

ii  39 

ii  37 

ii  35 

ii  33 

ii  31 

II  28 

II  26 

II  22 

-3  20 

ii  45 
ii  47 

ii  43 
ii  46 

ii  42 
ii  45 

ii  40 
ii  43 

ii  38 
ii  42 

ii  37 
ii  40 

ii  35 
ii  38 

II  32 

ii  36 

II  30 

ii  34 

ii  27 
ii  32 

-2  40 

ii  50 

ii  49 

ii  47 

ii  46 

ii  45 

ii  44 

ii  42 

ii  40 

ii  38 

ii  37 

—  2  20 

ii  52 

ii  50 

ii  49 

ii  48 

ii  47 

ii  46 

ii  44 

ii  43 

ii  41 

—  2   O 

ii  55 

ii  54 

ii  53 

ii  52 

ii  52 

ii  50 

ii  49 

ii  48 

ii  47 

ii  46 

-1  40 

ii  57 

ii  56 

ii  55 

ii  55 

ii  55 

ii  54 

ii  53 

ii  52 

ii  5i 

ii  50 

—  I  20 

ii  59 

ii  59 

ii  58 

ii  58 

ii  58 

ii  57 

ii  57 

ii  56 

ii  56 

ii  55 

—  I   0 

12   2 

12   2 

12   I 

12   I 

12   I 

12   I 

12   I 

12   0 

12   0 

ii  59 

-0  40 

12  4 

12  4 

12  4 

12  4 

12  4 

12  4 

12  4 

12  4 

12  4 

12  4 

—  o  20 

12  7 

12  7 

12  7 

12  7 

12  7 

12  7 

12   8 

12   8 

12   8 

12   9 

+  0  0 

12  9 

12  9 

12  10 

12  10 

12  IO 

12  II 

12  II 

12  12 

12  13 

12  13 

o  20 

12  II 

12  12 

12  13 

12  13 

12  14 

12  14 

12  15 

12  l6 

12  17 

12  18 

o  40 

12  14 

12  14 

12  15 

12  l6 

12  17 

12  17 

12  19 

12  20 

12  21 

12  23 

1  0 

12  l6 

12  17 

12  18 

12  19 

12  20 

12  21 

12  22 

12  24 

12  25 

12  27 

i  20 

12  19 

12  2O 

12  20 

12  22 

12  23 

12  25 

12  26 

12  28 

12  29 

12  32 

i  40 

12  21 

12  22 

12  23 

12  25 

12  26 

12  28 

12  30 

12  32 

12  34 

12  37 

2  0 

12  23 

12  25 

12  26 

12  28 

12  29 

12  31 

12  34 

12  36 

12  38 

12  41 

2  20 

12  26 

12  28 

12  29 

12  31 

12  32 

12  35 

12  37 

12  40 

12  43 

12  46 

2  40 

12  28 

12  30 

12  32 

12  34 

12  36 

12  38 

12  41 

12  44 

12  47 

12  50 

3  0 

12  31 

12  32 

12  35 

12  37 

12  39 

12  41 

12  44 

12  48 

12  51 

12  55 

3  20 

12  33 

12  35 

12  37 

12  40 

12  42 

12  45 

12  48 

12  52 

12  55 

13  o 

3  40 

12  35 

12  38 

12  40 

12  43 

12  46 

12  49 

12  52 

12  56 

13  o 

13  4 

4  0 

12  38 

12  40 

12  43 

12  46 

12  49 

12  52 

12  56 

13  o 

13  4 

13  9 

4  20 

12  40 

12  43 

12  46 

12  49 

12  52 

12  55 

12  59 

13  4 

13  8 

13  14 

4  40 

12  43 

12  46 

12  49 

12  52 

12  55 

12  59 

13  3 

13  8 

13  13 

13  19 

5  0 

12  45 

12  48 

12  51 

12  55 

12  58 

13   2 

13  7 

13  12 

13  17 

13  23 

5  20 

12  47 

12  51 

12  54 

12  58 

13   2 

13  6 

13  ii 

13  16 

13  22 

13  28 

5  4-O 

12  50 

12  53 

12  57 

13  I 

13   5 

13  10 

13  14 

13  20 

13  26 

13  33 

6  0 

12  53 

12  56 

12  59 

13  4 

13  8 

13  13 

13  18 

13  24 

13  31 

13  38 

6  20 

12  55 

12  59 

13   2 

13  7 

13  II 

13  16 

13  22 

13  28 

13  35 

13  43 

6  40 

12  58 

13  I 

13  5 

13  10 

13  14 

13  20 

13  26 

13  32 

13  39 

13  47 

7  0 

13  o 

13  4 

13  8 

13  13 

13  18 

13  23 

13  29 

13  36 

13  44 

13  52 

7  20 

13   2 

13  7 

13  ii 

13  16 

13  21 

13  27 

13  33 

13  40 

13  48 

13  57 

7  40 

13  5 

13  9 

13  14 

13  19 

13  25 

13  31 

13  37 

13  44 

13  53 

14  2 

8  0 

13  7 

13  12 

13  17 

13  22 

13  28 

13  34 

13  4i 

13  48 

13  57 

14  7 

SMITHSONIAN  TABLES. 


169 


TABLE  61. 

DURATION    OF   SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 
of 
the  Sun. 

LATITUDE  NORTH. 

0° 

5° 

10° 

15° 

20° 

25° 

30° 

35° 

40° 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

+  8°  0' 

12  7 

12  13 

12  l8 

12  24 

12  3I 

12  38 

12  45 

12  53 

13  3 

8  20 

12  7 

12  13 

12  19 

12  25 

12  32 

12  39 

12  47 

12  55 

13  5 

8  40 

12  7 

12  13 

12  19 

12  26 

12  33 

12  40 

12  48 

12  57 

13  8 

9  0 

12  7 

12  13 

12  20 

12  26 

12  34 

12  41 

12  50 

12  59 

13  10 

9  20 

12  7 

12  I3 

12  20 

12  27 

12  35 

12  43 

12  52 

13  i 

13  13 

9  40 

12  7 

12  14 

12  21 

12  28 

12  36 

12  44 

12  53 

13  3 

13  14 

10  0 

12  7 

12  14 

12  21 

12  29 

12  37 

12  45 

12  55 

13  5 

13  17 

10  20 

12  7 

12  14 

12  22 

12  29 

12  38 

12  47 

12  56 

13  7 

13  19 

10  40 

12  7 

12  14 

12  22 

12  30 

12  39 

12  48 

12  58 

13  9 

13  22 

II  0 

12  7 

12  15 

12  23 

12  31 

12  40 

12  49 

12  59 

13  ii 

13  24 

II  20 

12  7 

12  15 

12  23 

12  32 

12  41 

12  50 

13  I 

13  13 

13  26 

II  40 

12  7 

12  15 

12  24 

12  32 

12  42 

12  52 

13   2 

13  15 

13  29 

12  0 

12  7 

12  15 

12  24 

12  33 

12  43 

12  53 

13  4 

13  17 

13  31 

12  20 

12  7 

12  l6 

12  25 

12  34 

12  44 

12  55 

13  6 

13  19 

13  34 

12  40 

12  7 

12  l6 

12  25 

12  35 

12  45 

12  56 

13  8 

13  21 

13  36 

13  0 

12  7 

12  l6 

12  26 

12  35 

12  46 

12  57 

13  9 

13  23 

13  38 

13  20 

12  7 

12  l6 

12  26 

12  36 

12  47 

12  58 

13  ii 

13  25 

13  4i 

13  40 

12  7 

12  17 

12  27 

12  37 

12  48 

13  o 

13  13 

13  27 

13  43 

14  0 

12  7 

12  17 

12  27 

12  38 

12  49 

13  I 

13  14 

13  29 

13  46 

14  20 

12  7 

12  17 

12  28 

12  39 

12  50 

I3   2 

13  16 

13  3i 

13  48 

14  40 

12  7 

12  17 

12  28 

12  40 

12  51 

13  4 

13  17 

13  33 

13  5i 

15  0 

12  7 

12  18 

12  29 

12  40 

12  52 

13  5 

13  19 

13  35 

13  53 

15  20 

12  7 

12  18 

12  29 

12  41 

12  53 

13  7 

13  21 

13  37 

13  56 

15  40 

12  7 

12  18 

12  30 

12  41 

12  54 

13  8 

13  23 

13  39 

13  58 

16  0 

12  7 

12  19 

12  30 

12  42 

12  55 

13  9 

13  25 

13  4i 

14  i 

16  20 

12  7 

12  19 

12  3I 

12  43 

12  56 

13  II 

13  26 

13  43 

14  3 

16  40 

12  7 

12  19 

12  31 

12  44 

12  58 

13  12 

13  28 

13  45 

14  6 

17  0 

12  7 

12  19 

12  32 

12  45 

12  59 

13  13 

I3  29 

13  47 

14  8 

17  20 

12  7 

12  20 

12  32 

12  46 

13  o 

13  15 

13  31 

13  50 

14  ii 

17  40 

12  7 

12  20 

12  33 

12  46 

13  I 

13  16 

13  33 

13  52 

14  14 

18  0 

12  7 

12  20 

12  33 

12  47 

13   2 

13  17 

13  35 

13  54 

14  16 

18  20 

12  7 

12  20 

12  34 

12  48 

13  3 

13  19 

13  37 

13  56 

14  19 

18  40 

12  7 

12  21 

12  34 

12  49 

13  4 

13  20 

13  38 

13  58 

14  22 

19  0 

12  7 

12  21 

12  35 

12  50 

13  5 

13  22 

13  40 

14  o 

14  24 

19  20 

12  7 

12  21 

12  35 

12  51 

13  6 

13  23 

13  42 

14   2 

14  26 

19  40 

12  7 

12  22 

12  36 

12  52 

13  7 

13  25 

13  44 

14  5 

14  29 

20  0 

12  7 

12  22 

12  36 

12  52 

13  8 

13  26 

13  46 

14  7 

14  32 

20  20 

12  7 

12  22 

12  37 

12  53 

13  10 

13  28 

13  47 

14  10 

14  35 

2O  40 

12  7 

12  22 

12  37 

12  54 

13  II 

13  29 

13  49 

14  12 

14  37 

21  0 

12  7 

12  23 

12  38 

12  55 

13  12 

13  31 

13  5i 

14  14 

14  40 

21  20 

12  7 

12  23 

12  39 

12  56 

13  13 

13  32 

13  53 

14  16 

14  43 

21  40 

12  7 

12  23 

12  39 

12  56 

13  14 

13  34 

13  55 

14  19 

14  46 

22  0 

12  7 

12  24 

12  40 

12  57 

13  16 

13  35 

13  56 

14  21 

14  49 

22  20 

12  7 

12  24 

12  41 

12  58 

13  17 

13  37 

13  58 

14  23 

14  52 

22  40 

12  7 

12  24 

12  41 

12  59 

13  18 

13  38 

14  o 

14  25 

14  54 

23  0 

12  7 

12  25 

12  42 

13  o 

13  19 

13  40 

14   2 

14  28 

14  57 

23  20 

12  7 

12  25 

12  42 

13  I 

13  20 

13  4i 

14  4 

14  30 

15   0 

23  27 

12  7 

12  25 

12  43 

13  I 

13  20 

13  4i 

T4  5 

14  31 

15  i 

SMITHSONIAN  TABLES. 


170 


TABLE  61 
DURATION    OF   SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 
of 
the  Sun. 

I,ATlTUDE  NORTH. 

42° 

44° 

46° 

48° 

50° 

52° 

54° 

56° 

58° 

60° 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

+  8°  0' 

13  7 

13  12 

13  17 

13  22 

13  28 

13  34 

13  41 

13  49 

13  58 

14  7 

8  20 

13  1° 

13  14 

13  20 

13  25 

13  31 

13  38 

13  45 

13  53 

14   2 

14  12 

8  40 

13  I2 

13  17 

13  23 

13  28 

13  34 

13  41 

13  49 

13  57 

14  6 

14  17 

9  0 

13  15 

13  20 

13  25 

13  31 

13  38 

13  45 

13  53 

14  i 

14  ii 

14  22 

9  20 

13  17 

13  23 

I3  28 

13  34 

13  41 

13  49 

13  56 

14  5 

14  15 

14  26 

9  40 

13  20 

13  25 

13  31 

13  38 

13  44 

13  52 

14  o 

14  10 

14  20 

14  31 

10  0 

13  22 

13  28 

13  34 

13  4i 

13  48 

13  56 

14  4 

14  14 

14  25 

14  36 

10  20 

13  25 

13  31 

13  37 

13  44 

13  5i 

13  59 

14  8 

14  18 

14  29 

14  41 

10  40 

13  28 

13  34 

13  40 

13  47 

13  55 

14  3 

14  12 

14  22 

14  34 

14  47 

M  0 

13  30 

13  36 

13  43 

13  50 

13  58 

14  7 

14  16 

14  27 

14  38 

14  52 

II  20 

13  32 

13  39 

13  46 

13  53 

14  i 

14  10 

14  20 

14  31 

14  43 

14  57 

II  40 

13  35 

13  4i 

13  49 

13  56 

14  5 

14  T4 

14  24 

14  35 

14  48 

15   2 

12  0 

13  38 

13  44 

13  52 

14  o 

14  8 

14  18 

14  28 

14  40 

14  53 

15  8 

12  20 

13  40 

13  47 

13  55 

14  3 

14  12 

14  22 

14  32 

14  44 

14  58 

15  13 

12  40 

13  43 

13  50 

13  58 

14  6 

14  16 

14  25 

14  37 

14  49 

15   2 

15  18 

13  0 

13  46 

13  53 

14  i 

14  10 

14  19 

14  29 

14  41 

14  53 

15  7 

15  23 

13  20 

13  48 

13  56 

14  4 

14  13 

14  22 

14  33 

14  45 

14  58 

15  13 

15  29 

13  40 

13  50 

13  58 

14  7 

14  16 

14  26 

14  37 

14  49 

15   2 

15  17 

15  35 

14  0 

13  53 

14  i 

14  10 

14  19 

14  29 

14  4i 

14  53 

15  7 

15  22 

15  40 

14  20 

13  56 

14  4 

14  13 

14  23 

14  33 

14  45 

14  57 

15  ii 

15  28 

15  46 

14  40 

13  59 

M  7 

14  16 

14  26 

14  37 

14  49 

15   2 

15  16 

15  33 

15  5i 

15  0 

14  i 

14  10 

14  19 

14  29 

14  40 

14  52 

15  6 

15  21 

15  38 

15  57 

15  20 

H  4 

14  13 

14  22 

14  33 

14  44 

14  56 

15  1° 

15  26 

15  43 

16  2 

15  40 

14  7 

14  16 

14  26 

14  36 

1448 

15  o 

15  14 

15  30 

15  48 

16  8 

16  0 

14  10 

14  19 

14  29 

14  40 

14  52 

15  4 

15  19 

15  35 

15  53 

16  14 

16  20 

14  12 

14  22 

14  32 

14  43 

14  55 

15  8 

15  23 

15  40 

15  59 

16  20 

16  40 

14  15 

14  25 

14  35 

14  46 

14  59 

15  13 

15  28 

15  45 

16  4 

16  26 

17  0 

14  17 

14  28 

1438 

14  50 

15  3 

15  17 

15  32 

15  50 

16  10 

16  32 

17  20 

14  20 

14  31 

14  41 

14  53 

15  7 

15  21 

15  37 

15  55 

16  15 

1638 

17  40 

14  23 

14  34 

14  45 

14  57 

15  10 

15  25 

15  41 

16  o 

16  20 

16  45 

18  0 

14  26 

14  37 

14  48 

15  i 

15  14 

15  29 

15  46 

16  5 

16  26 

16  51 

18  20 

14  29 

14  40 

14  52 

15  4 

15  18 

15  34 

15  50 

16  10 

16  32 

16  58 

18  40 

14  32 

14  43 

14  55 

15  8 

15  22 

15  38 

15  55 

16  15 

16  38 

17  4 

19  0 

14  35 

14  46 

14  58 

15  ii 

15  26 

15  42 

16  o 

16  20 

16  44 

17  ii 

19  20 

14  37 

14  49 

15  i 

15  15 

15  30 

15  46 

16  5 

16  25 

16  50 

17  17 

19  40 

14  40 

14  52 

15  5 

15  19 

15  34 

15  5i 

16  10 

16  31 

16  56 

17  24 

20  0 

14  43 

14  55 

15  8 

15  22 

15  38 

15  55 

16  15 

16  37 

17  2 

17  3i 

20  20 

H  46 

14  58 

15  ii 

15  26 

15  42 

16  o 

16  20 

16  42 

17  8 

17  38 

20  40 

14  49 

15   2 

15  15 

15  30 

15  46 

16  4 

16  25 

16  47 

17  14 

17  46 

21  0 

14  52 

15  5 

15  19 

15  34 

15  50 

16  9 

16  30 

16  53 

17  20 

17  53 

21  2O 

14  55 

15  8 

15  22 

15  38 

15  55 

16  13 

16  35 

16  59 

17  27 

18  i 

21  40 

14  58 

15  ii 

15  26 

15  42 

15  59 

16  18 

16  40 

17  5 

17  34 

18  8 

22  0 

15  i 

15  14 

15  29 

15  46 

16  3 

16  23 

16  45 

17  ii 

17  40 

18  16 

22  2O 

15  4 

15  18 

15  33 

15  49 

16  7 

16  28 

16  50 

17  17 

17  47 

18  24 

22  40 

15  7 

15  22 

15  37 

15  53 

16  12 

16  32 

16  56 

17  23 

17  54 

18  32 

23  0 

15  10 

15  25 

15  40 

15  57 

i6  16 

16  37 

17  i 

17  29 

18  i 

18  41 

23  20 

15  13 

15  28 

15  44 

16  i 

16  21 

16  42 

17  7 

17  35 

18  8 

18  49 

23  27 

15  14 

15  29 

15  46 

16  3 

16  23 

16  44 

17  9 

17  37 

18  ii 

18  52 

SMITHSONIAN  TADLES. 


171 


TABLE  61. 

DURATION    OF   SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 
of 
the  Sun. 

LATITUDE  NORTH. 

60° 

61° 

62° 

63° 

64° 

65° 

66° 

67° 

68° 

69° 

70° 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

-23°27/ 

552 

53i 

5    8 

442 

411 

334 

2  46 

I29 

—  23    20 

555 

534 

5  12 

446 

4  16 

340 

253 

141 

-23     o 

6     2 

543 

521 

456 

4  28 

353 

311 

2  II 

-22  40 

6  10 

5  5i 

530 

5    6 

439 

4    7 

327 

235 

059 

—  22    20 

617 

559 

5  39 

5i6 

450 

4  20 

343 

256 

M3 

—  22       0 

625 

6    7 

547 

525 

5    i 

432 

358 

3  14 

2I3 

-21   40 

632 

6  14 

556 

534 

5  ii 

443 

4" 

33i 

238 

I     I 

—  21     2O 

639 

6  22 

6    4 

543 

5  20 

455 

424 

347 

259 

145 

—  21       0 

646 

6  29 

6  12 

552 

530 

5    5 

436 

4    i 

318 

2  16 

-20  40 

652 

637 

6  20 

6    i 

540 

5i6 

448 

4  16 

335 

241 

I     2 

—  20    20 

659 

644 

627 

6    9 

549 

526 

459 

429 

35i 

3    2 

147 

—  20       0 

7    5 

651 

634 

617 

558 

535 

5  10 

441 

4    6 

322 

2  19 

-19   40 

7  12 

658 

6  42 

625 

6    6 

545 

521 

453 

4  20 

339 

244 

—  19    20 

718 

7    4 

649 

633 

6  14 

554 

53i 

5    5 

434 

355 

3    6 

—  19     o 

725 

7  ii 

656 

6  41 

623 

6    3 

54i 

5i6 

447 

4ii 

326 

-18   40 

731 

717 

7    4 

648 

631 

612 

55i 

526 

459 

425 

344 

-  18  20 

737 

724 

710 

655 

639 

6  20 

6    i 

537 

5  ii 

439 

4    i 

-18     o 

743 

73i 

717 

7    3 

647 

6  29 

6  10 

547 

522 

452 

4  16 

-17   40 

749 

737 

724 

7  10 

655 

638 

6  19 

557 

533 

5    5 

43i 

—  17  20 

755 

743 

73i 

717 

7    2 

646 

628 

6    7 

543 

5  17 

445 

-17     o 

8    i 

749 

737 

724 

7    9 

653 

636 

6  16 

554 

528 

458 

-16   40 

8    6 

755 

744 

73i 

717 

7    i 

644 

626 

6    4 

540 

5  ii 

—  16  20 

812 

8    i 

750 

738 

724 

7    9 

652 

635 

6  14 

5  5i 

523 

—  16     o 

817 

8    7 

756 

744 

73i 

717 

7    i 

644 

6  24 

6     2 

535 

-15   40 

823 

813 

8     2 

75i 

738 

725 

7    9 

652 

634 

6  12 

547 

—  15    20 

829 

8  19 

8    8 

758 

745 

732 

717 

7    i 

643 

622 

559 

-15     o 

834 

825 

815 

8    4 

752 

739 

725 

7    9 

652 

632 

6  10 

-14  40 

840 

831 

821 

8  10 

759 

746 

732 

717 

7    i 

6  42 

6  20 

—  14  20 

845 

836 

827 

817 

8    5 

753 

740 

726 

7  10 

651 

631 

—  14     o 

850 

842 

833 

823 

812 

8    i 

747 

734 

718 

7    i 

6  41 

-13    40 

856 

847 

838 

829 

8  19 

8    7 

755 

74i 

726 

710 

651 

—  13    20 

9    i 

853 

844 

835 

825 

8  14 

8     2 

749 

735 

719 

7    i 

-13     o 

9    6 

858 

850 

841 

832 

821 

8  10 

757 

743 

728 

710 

-12   40 

9  ii 

9    4 

856 

847 

838 

828 

817 

8    5 

75i 

737 

720 

—  12    20 

9  17 

9  10 

9    2 

853 

844 

834 

8  24 

812 

759 

745 

729 

—  12       0 

922 

915 

9   7 

859 

850 

841 

831 

8  20 

8    7 

753 

738 

-M    40 

927 

9  20 

913 

9    5 

856 

847 

838 

827 

815 

8     2 

747 

—  II    20 

932 

925 

9i9 

911 

9    3 

854 

844 

834 

823 

8  10 

756 

—  II       0 

937 

93i 

924 

917 

9    9 

9    o 

851 

841 

831 

8  18 

8    5 

-10   40 

942 

936 

929 

922 

915 

9    7 

858 

849 

838 

826 

814 

—  10    20 

947 

94i 

935 

928 

9  21 

913 

9   5 

856 

846 

834 

822 

—  10       0 

952 

946 

940 

934 

927 

919 

911 

9    3 

853 

842 

831 

-  9   40 

957 

95i 

946 

940 

933 

9  26 

9  18 

9  10 

9    o 

850 

839 

—    9  20 

10     2 

956 

95i 

945 

939 

932 

925 

9  16 

9    8 

858 

847 

-    9     o 

!0     7 

10     2 

956 

950 

944 

938 

93i 

923 

915 

9    5 

855 

-  8   40 

10  II 

10   7 

10     2 

956 

950 

944 

937 

930 

922 

913 

9    3 

—     8    20 

10  16 

10  12 

10   7 

10     2 

956 

950 

944 

937 

929 

9  21 

911 

-   8     o 

10  21 

10  17 

10  12 

10    7 

10     2 

956 

950 

943 

936 

928 

919 

SMITHSONIAN  TABLES 


172 


TABLE  61 

DURATION    OF   SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 

Of             ' 

the  Sun. 

I,ATITUDE  NORTH. 

71° 

72° 

73° 

74° 

75° 

76° 

77° 

78° 

79° 

80° 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

-23°  27' 

—  23    20 

-23     o 

-22  40 

—  22     2O 

—  22       0 

-21  40 

—  21     2O 

—  21       O 

-20  40 

—  20    20 

—  2O       O 

-19  40 

i    3 

—  19    20 

i  50 

—  19     o 

2   22 

-18  40 

2  47 

I     5 

—  18  20 

3  10 

I  52 

—  18     o 

3  30 

2  25 

-17  40 

3  49 

2  52 

I     6 

—  17    20 

4    6 

3  14 

i  55 

-•17     o 

4  22 

3  35 

2   29 

-16  40 

4  37 

3  54 

2  56 

I     8 

—  16  20 

4  52 

4  12 

3  20 

I  58 

—  16     o 

5    6 

4  28 

3  4i 

2   32 

-15  40 

5  19 

4  44 

4    i 

3     i 

I    10 

—  15    20 

5  32 

4  59 

4  19 

3  25 

2      2 

-15     o 

5  44 

5  13 

4  36 

3  47 

2  37 

-14  40 

556 

5  27 

4  52 

4    7 

3    6 

I   13 

—  14    20 

6    8 

5  4° 

5    7 

426 

3  3i 

2     5 

—  14     o 

6  19 

5  52 

5  21 

443 

3  54 

2  42 

-13  40 

6  29 

6    5 

5  35 

c      o 

4  14 

3  12 

I   15 

—  13    20 

6  40 

5  49 

5  16 

4  34 

338 

2    10 

-13     o 

651 

6  29 

6     2 

5  3i 

4  52 

4    2 

2   48 

-12  40 

6    i 

6  40 

615 

5  45 

5    9 

4  23 

3  19 

I  18 

—  12    2O 

7  ii 

6  50 

627 

5  59 

5  25 

4  43 

3  46 

2  15 

—  12       0 

7  21 

7    i 

6  39 

6  13 

5  41 

5    2 

4  10 

2  55 

-M    40 

7  3i 

7  12 

651 

6  26 

556 

5  19 

4  32 

3  27 

I  21 

—  ii   20 

7  40 

7  23 

7    3 

6  38 

6  ii 

538 

4  53 

3  55 

2   20 

—  II       0 

7  50 

7  33 

7  14 

651 

625 

5  54 

5  13 

4  20 

3     2 

-10  40 

—  10  20 

7  59 
8    8 

7  43 
7  53 

7  25 

7  35 

7    3 
7  15 

6  34 
6  52 

6    9 
6  23 

5  3i 
5  49 

4  43 
5    5 

3  35 
4    5 

I  25 
2  27 

—  IO       O 

817 

8    3 

7  46 

7  27 

7    4 

6  38 

6    6 

5  25 

4  31 

3  10 

-   9  40 

8  26 

813 

756 

7  38 

7  17 

652 

6   22 

5  44 

4  56 

3  46 

—    9  20 

835 

8   22 

8    7 

7  50 

7  29 

7    6 

6  38 

6    3 

5  19 

4  17 

-    9     o 

844 

831 

8  17 

8    i 

7  41 

7  20 

653 

6  21 

5  40 

4  44 

-  8  40 

—     8    20 

853 
9    i 

8  41 
8  50 

827 
837 

8  ii 

8  22 

7  53 
8    5 

733 
7  46 

7    8 

7    22 

6  38 
6  55 

6    o 
6  19 

5  10 

5  34 

-    8     o 

9  10 

859 

8  47 

833 

817 

7  59 

736 

7  ii 

6  38 

556 

SMITHSONIAN  TABLES. 


173 


TABLE  61. 

DURATION    OF   SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 
of 
the  Sun. 

LATITUDE  NORTH. 

60° 

61° 

62° 

63° 

64° 

65° 

66° 

67° 

68° 

69° 

70° 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

-8°  0' 

10  21 

10  17 

10  12 

10  7 

10  2 

956 

950 

943 

936 

928 

919 

-7  40 

10  26 

10  22 

10  17 

10  13 

10  8 

10  2 

956 

950 

943 

935 

927 

-7  20 

1031 

10  27 

1023 

10  18 

10  13 

10  8 

10  3 

957 

950 

943 

935 

-7  o 

1035 

1032 

1028 

1023 

10  19 

10  14 

10  9 

10  4 

957 

950 

943 

-6  40 

1040 

1037 

1033 

10  29 

10  25 

IO  2O 

10  15 

10  10 

10  4 

957 

95i 

—  6  20 

1045 

10  42 

1038 

1034 

1031 

10  26 

IO  22 

10  16 

10  II 

10  5 

958 

-6  o 

1050 

1047 

1043 

10  40 

1036 

1032 

10  28 

1023 

10  18 

10  12 

10  6 

-5  40 

1055 

1052 

1049 

1045 

1041 

1038 

1034 

10  29 

1025 

10  19 

10  14 

-5  20 

1059 

1056 

1054 

1050 

1047 

1044 

10  40 

1036 

1031 

IO  26 

10  21 

-5   o 

ii  4 

II  I 

1059 

1056 

1053 

1050 

1046 

10  42 

1038 

1034 

10  29 

-4  40 

ii  8 

ii  6 

ii  4 

II  I 

1058, 

1055 

1052 

1049 

1045 

1041 

1036 

—  4  20 

ii  13 

II  ii 

ii  9 

ii  7 

ii  4 

II  I 

1058 

1055 

1052 

1048 

1044 

-4  o 

ii  18 

ii  16 

ii  14 

II  12 

II  10 

ii  7 

ii  4 

II  I 

1058 

1055 

1051 

-3  40 

II  22 

II  21 

ii  19 

II  17 

ii  15 

ii  13 

II  IO 

ii  8 

ii  5 

II  2 

1059 

—  3  20 

II  27 

II  26 

ii  24 

II  22 

II  20 

ii  19 

ii  16 

ii  14 

ii  ii 

ii  9 

ii  6 

-3  o 

II  32 

II  31 

ii  29 

II  28 

II  26 

ii  24 

II  22 

II  20 

ii  18 

ii  16 

ii  13 

-2  40 

H37 

1135 

ii  34 

H33 

ii  31 

ii  30 

II  28 

II  27 

ii  25 

ii  23 

II  21 

—  2  2O 

II  41 

II  40 

ii  39 

II38 

ii  37 

ii  36 

ii  34 

H33 

1132 

ii  30 

II  28 

—  2   0 

II  46 

1145 

1144 

H43 

ii  43 

ii  41 

ii  40 

II  40 

1138 

H37 

ii  35 

-1  40 

II  50 

II  50 

H49 

1149 

ii  48 

1147 

ii  46 

II  46 

H45 

H44 

ii  43 

—  I  20 

ii  55 

ii  55 

ii  54 

ii  54 

ii  53 

ii  53 

ii  52 

II  52 

ii  52 

1151 

ii  50 

—  I   0 

H59 

ii  59 

H59 

ii  59 

H59 

H59 

1158 

II  58 

1158 

ii  58 

ii  58 

-0  40 

12  4 

12  4 

12  4 

12  4 

12  4 

12  4 

12  4 

12  4 

12  5 

12  5 

12  5 

—  0  20 

12  9 

12  9 

12  9 

12  IO 

12  10 

12  10 

12  IO 

12  II 

12  II 

12  12 

12  12 

0  0 

12  13 

12  14 

12  14 

1215 

12  15 

12  l6 

12  l6 

12  17 

12  18 

12  19 

12  19 

-f-0  20 

12  18 

12  19 

12  19 

12  20 

12  20 

12  22 

12  22 

I223 

1225 

12  26 

12  27 

o  40 

12  22 

12  23 

12  24 

12  25 

12  26 

12  27 

12  28 

12  29 

1231 

1233 

1234 

1   0 

12  27 

12  28 

12  29 

1231 

12  32 

1233 

1234 

12  36 

1238 

12  40 

12  41 

I  20 

12  32 

1233 

1234 

1236 

1237 

1239 

12  40 

12  42 

1244 

1247 

1249 

I  40 

1237 

1238 

1239 

12  41 

1243 

1244 

12  46 

1249 

1251 

1254 

12  56 

2  0 

12  41 

1243 

1244 

12  46 

1248 

12  50 

1252 

1255 

1258 

13  I 

13  4 

2  20 

12  46 

1247 

1249 

12  52 

1253 

12  56 

1259 

13   I 

13  4 

13  8 

1311 

2  40 

12  50 

1252 

1254 

1257 

1259 

13  2 

13  5 

13  7 

1311 

1315 

1319 

3  0 

1255 

1257 

1259 

13  2 

13  5 

13  8 

13  ii 

13  H 

13  17 

13  22 

1326 

3  20 

13  o 

13  2 

13  5 

13  7 

13  10 

1313 

13  17 

13  20 

13  24 

13  29 

1334 

3  40 

13  4 

13  7 

13  10 

1313 

13  16 

1319 

1323 

1327 

I33i 

1336 

1341 

4  0 

13  9 

1312 

1315 

13  18 

1322 

1325 

1329 

1333 

1338 

1343 

1349 

4  20 

13  14 

13  17 

13  20 

1323 

13  27 

1331 

1335 

1340 

1345 

1350 

1356 

4  40 

13  19 

13  22 

1325 

1329 

1332 

1337 

I34i 

1346 

1352 

1358 

14  4 

5  0 

1323 

1327 

1330 

1334 

1338 

1343 

1347 

1353 

1358 

14  5 

14  ii 

5  20 

13  28 

1332 

1335 

1340 

1344 

1349 

1354 

1359 

14  5 

14  12 

1419 

5  40 

1333 

1337 

1341 

1345 

1350 

1355 

14  o 

14  6 

14  12 

14  19 

1427 

6  0 

1338 

1342 

1346 

1350 

1355 

14  I 

14  6 

14  13 

14  19 

14  26 

1435 

6  20 

1343 

1347 

1351 

1356 

14  i 

14  7 

14  12 

1419 

14  26 

1434 

1443 

6  40 

1347 

1352 

1356 

14  I 

14  7 

1413 

14  18 

14  26 

1433 

1442 

I45i 

7  0 

1352 

1357 

14  I 

14  7 

14  12 

1419 

1425 

1432 

1440 

1449 

1459 

7  20 

1357 

14  2 

14  7 

14  13 

14  18 

1425 

i43i 

1439 

1448 

1457 

15  7 

7  40 

14  2 

14  7 

14  12 

14  18 

1424 

I43i 

1438 

1446 

1455 

15  4 

15  15 

8  0 

14  7 

14  12 

14  17 

1423 

1430 

1437 

1445 

1452 

15  2 

15  12 

1523 

SMITHSONIAN  TABLES. 


174 


TABLE  61, 
DURATION    OF   SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 
of 
the  Sun. 

I,ATITUDE  NORTH. 

71° 

72° 

73° 

74° 

75° 

76° 

77° 

78° 

79° 

80° 

h.  m. 

h.  in. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

-8°  0' 

9  10 

8  59 

8  47 

833 

8  17 

758 

7  37 

7  10 

638 

556 

-740 

9  18 

9  08 

8  56 

8  43 

8  28 

8  ii 

7  50 

726 

6  56 

6  18 

-7  20 

9  26 

9  17 

9  6 

853 

8  39 

823 

8  4 

7  41 

7  14 

638 

-7  o 

9  35 

9  26 

9  16 

9  3 

8  50 

835 

8  17 

756 

7  3i 

6  58 

-640 

9  43 

9  34 

9  25 

9  14 

9  i 

8  47 

8  30 

8  ii 

7  47 

7  17 

—  6  20 
-6  o 

9  5i 
9  59 

9  43 
9  52 

9  34 
9  43 

9  24 
9  34 

9  12 
9  23 

8  59 
9  ii 

8  43 
8  56 

8  25 
8  39 

8  3 
8  19 

736 
7  54 

-540 

10  7 

10   I 

9  53 

9  44 

9  34 

9  22 

9  9 

853 

8  34 

8  ii 

-5  20 

10  15 

10  9 

10   2 

9  53 

9  44 

9  34 

9  22 

9  7 

8  50 

8  28 

-5  o 

10  23 

10  17 

10  II 

10  3 

9  55 

9  45 

9  34 

9  20 

9  5 

8  46 

-440 

10  31 

10  26 

10  20 

10  13 

10  5 

9  56 

9  46 

9  34 

9  19 

9  2 

—  4  20 

10  39 

10  34 

10  29 

10  22 

10  15 

10  7 

9  58 

9  47 

9  34 

9  18 

-4  o 

10  47 

10  43 

10-38 

10  32 

10  26 

10  18 

10  10 

10  0 

9  49 

9  34 

-340 

10  55 

10  51 

10  46 

10  41 

10  36 

10  29 

10  22 

10  13 

10  3 

9  50 

-3  20 

ii  3 

10  59 

10  55 

10  51 

10  46 

10  40 

10  34 

10  26 

10  17 

10  6 

-3  o 

ii  ii 

ii  8 

ii  4 

II   0 

10  56 

10  51 

10  45 

10  39 

10  31 

10  22 

-240 

ii  19 

ii  16 

ii  13 

II  10 

ii  6 

II   2 

10  57 

10  52 

10  45 

10  37 

—  2  20 

ii  26 

ii  24 

II  22 

II  19 

ii  16 

II  13 

ii  8 

ii  4 

10  59 

10  52 

—  2   0 

ii  34 

ii  32 

II  31 

II  28 

ii  26 

II  23 

II  20 

ii  17 

ii  13 

ii  8 

-I  40 

ii  42 

ii  41 

ii  39 

II  38 

ii  36 

ii  34 

II  32 

ii  29 

ii  26 

ii  23 

—  I  20 

ii  49 

ii  49 

ii  48 

ii  47 

ii  46 

ii  45 

ii  43 

ii  42 

ii  40 

ii  38 

—  I   0 

ii  57 

ii  57 

ii  56 

ii  56 

ii  56 

ii  55 

ii  55 

ii  55 

ii  54 

ii  53 

-040 

12  5 

12  5 

12  5 

12  5 

12   6 

12   6 

12  7 

12  7 

12   8 

12   8 

—  o  20 

12  13 

12  13 

12  14 

12  15 

12  l6 

12  17 

12  18 

12  2O 

12  21 

12  23 

0  0 

12  20 

12  22 

12  22 

12  24 

12  26 

12  28 

12  29 

12  32 

12  35 

12  38 

+  0  20 

12  28 

12  30 

12  31 

12  34 

12  36 

12  38 

12  41 

12  44 

12  49 

12  53 

o  40 

12  36 

12  38 

12  40 

12  43 

12  46 

12  49 

12  53 

12  57 

13   2 

13  9 

1  0 

12  44 

12  46 

12  49 

12  52 

12  56 

13  o 

13  5 

13  10 

13  16 

13  24 

i  20 

12  52 

12  55 

12  58 

I3   2 

13   6 

13  II 

13  16 

13  23 

13  30 

13  40 

i  40 

12  59 

13  3 

13  7 

I3  II 

13  i6 

13  22 

13  28 

13  36 

13  44 

13  55 

2  0 

13  7 

13  ii 

13  16 

13  20 

13  26 

13  32 

13  40 

13  49 

13  59 

14  ii 

2  2O 

13  15 

13  19 

13  25 

13  30 

13  36 

13  43 

13  52 

14  i 

14  13 

14  27 

2  40 

13  23 

13  28 

13  33 

13  40 

13  46 

13  54 

14  4 

14  H 

14  28 

14  43 

3  0 

13  31 

13  36 

13  42 

13  49 

13  57 

14  5 

14  16 

14  28 

14  42 

14  59 

3  20 

13  39 

13  44 

13  5i 

13  59 

14  7 

14  17 

14  28 

14  4i 

14  56 

15  16 

3  40 

13  47 

13  53 

14  i 

14  8 

14  17 

14  28 

14  40 

14  55 

15  ii 

15  33 

4  0 

13  55 

14  2 

14  10 

14  18 

14  28 

14  40 

14  53 

15  8 

15  27 

15  50 

4  20 

14  3 

14  10 

14  19 

14  28 

M  38 

14  5i 

15  5 

15  22 

15  43 

16  7 

4  40 

14  ii 

14  19 

14  28 

14  38 

14  49 

15   2 

15  18 

15  36 

15  58 

16  25 

5  0 

14  19 

14  28 

14  37 

14  48 

15   0 

15  14 

15  3i 

15  50 

16  14 

16  44 

5  20 

14  27 

14  37 

14  46 

14  58 

15  ii 

15  26 

15  44 

16  5 

16  31 

17  3 

5  40 

14  35 

14  45 

14  56 

15  8 

15  22 

15  38 

15  57 

16  20 

16  47 

17  22 

6  0 

14  44 

14  54 

15  5 

15  19 

15  33 

15  50 

16  ii 

16  35 

17  5 

17  43 

6  20 

14  52 

15  3 

15  15 

15  29 

15  44 

16  3 

16  25 

16  51 

17  23 

18  5 

6  40 

15  i 

15  12 

15  25 

15  40 

15  56 

16  16 

16  39 

17  7 

17  41 

18  27 

7  0 

15  10 

15  22 

15  35 

15  50 

16  8 

16  29 

1653 

17  23 

18  i 

18  50 

7  20 

15  18 

12  31 

15  45 

16  i 

16  20 

16  42 

17  8 

17  40 

18  21 

19  16 

7  4o 

15  27 

15  40 

15  55 

16  12 

16  32 

16  55 

17  23 

17  58 

18  42 

19  44 

8  0 

15  35 

15  50 

16  5 

16  23 

16  44 

17  9 

17  39 

18  16 

19  5 

20  15 

SMITHSONIAN  TABLES. 


175 


TABLE;  61. 

DURATION    OF   SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 
of 
the  Sun. 

LATITUDE  NORTH. 

60° 

61° 

62° 

63° 

64° 

65° 

66° 

67° 

68° 

69° 

70° 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

+  8°  0' 

14  7 

14  12 

14  17 

1423 

1430 

1437 

1445 

1453 

15  2 

15  12 

1523 

8  20 

14  12 

14  i"t 

1423 

1429 

1436 

1443 

1452 

15  o 

15  10 

15  20 

15  32 

8  40 

1417 

14  22 

14  28 

1435 

1442 

M50 

1458 

15  7 

15  17 

15  28 

1540 

9  0 

14  22 

1427 

1434 

1441 

1448 

1456 

15  5 

15  14 

15  25 

1536 

1549 

9  20 

1427 

1432 

1439 

1446 

1454 

15  2 

15  ii 

15  21 

1532 

1544 

1557 

9  40 

1432 

1438 

1445 

1452 

15  0 

15  9 

15  18 

15  28 

1540 

1552 

16  6 

10  0 

1437 

1443 

1450 

1458 

15  6 

1515 

1525 

1535 

1547 

16  o 

16  15 

10  20 

1442 

1449 

1456 

15  4 

1513 

15  22 

1532 

1543 

1555 

16  8 

16  24 

10  40 

1447 

1454 

15  2 

15  10 

15  19 

15  28 

1539 

1550 

16  3 

16  17 

1633 

II  0 

1452 

1459 

15  7 

15  16 

1525 

1535 

1546 

1558 

16  ii 

1626 

16  42 

II  20 

1457 

15  5 

15  13 

15  22 

i53i 

1541 

1553 

16  5 

16  19 

1634 

1652 

II  40 

15  2 

15  10 

15  19 

15  28 

1538 

1548 

16  o 

16  13 

16  27 

1643 

17  i 

12  0 

15  8 

15  16 

15  25 

1534 

1544 

1555 

16  7 

16  21 

1635 

1652 

1711 

12  20 

15  13 

15  21 

1531 

1540 

1550 

16  2 

16  15 

16  29 

1644 

17  i 

1721 

12  40 

1518 

15  27 

1536 

1546 

1557 

16  9 

l6  22 

1637 

1653 

1711 

1731 

13  0 

15  23 

1533 

1542 

1553 

16  4 

1616 

1630 

1645 

17  2 

17  20 

1741 

13  20 

15  29 

1539 

1548 

1559 

16  ii 

16  23 

1637 

1653 

17  10 

1730 

1752 

13  40 

1535 

1544 

1555 

16  5 

16  17 

1631 

1645 

17  i 

17  19 

1740 

18  3 

14  0 

1540 

1550 

16  I 

16  12 

16  24 

1638 

1653 

17  10 

1729 

1750 

18  14 

14  20 

1546 

1556 

16  7 

16  19 

1631 

16  46 

17  I 

1719 

1738 

18  o 

1826 

14  40 

i55i 

16  2 

16  13 

16  25 

1638 

1653 

17  9 

17  28 

1748 

18  ii 

1838 

15  0 

1557 

16  8 

16  19 

1632 

1646 

17  i 

17  17 

1737 

1758 

IS  22 

1850 

15  20 

16  2 

16  14 

1626 

1639 

1653 

17  9 

17  26 

1746 

18  8 

1833 

19  3 

15  40 

16  8 

16  20 

1632 

16  46 

17  i 

1717 

1735 

1755 

1818 

1845 

19  16 

16  0 

16  14 

1626 

1639 

1653 

17  8 

1725 

1744 

18  5 

1829 

1857 

1930 

16  20 

16  20 

1632 

16  46 

17  o 

17  16 

1733 

1753 

1815 

18  40 

19  10 

1945 

16  40 

1626 

1639 

1652 

17  7 

1723 

1741 

18  2 

1825 

1851 

1923 

20  I 

17  0 

1632 

1645 

1659 

17  14 

I73i 

1750 

18  ii 

1835 

19  3 

1936 

20  17 

17  20 

1638 

1652 

17  6 

17  22 

1739 

1759 

18  21 

1846 

19  15 

1950 

2035 

17  40 

1645 

1658 

1713 

1729 

1747 

18  8 

1831 

i857 

19  28 

20  6 

2055 

18  0 

1651 

17  5 

17  20 

1737 

1756 

18  17 

1841 

19  8 

i94i 

20  22 

21  17 

18  20 

1658 

1712 

17  28 

1745 

18  5 

1826 

1852 

19  20 

1955 

2040 

21  42 

18  40 

17  4 

1719 

1735 

1753 

18  14 

1836 

19  3 

1933 

20  10 

2059 

2213 

19  0 

1711 

17  26 

1743 

18  2 

1823 

1846 

1914 

1946 

2O  26 

21  2O 

2258 

19  20 

1717 

1733 

i75i 

18  10 

1832 

1856 

1925 

20  o 

2044 

2145 

19  40 

1724 

1741 

1759 

18  19 

1841 

19  7 

1937 

20  14 

21  3 

22  l6 

20  0 

I73i 

1748 

18  7 

1828 

1851 

1919 

1950 

2030 

21  23 

2259 

20  20 

1738 

1756 

1815 

i837 

19  i 

1930 

20  4 

2047 

2447 

2O  40 

1745 

18  4 

18  23 

1846 

19  12 

1942 

20  19 

21  5 

22  17 

21  0 

1752 

14  ii 

1832 

1856 

1923 

1925 

2034 

21  26 

23  I 

21  20 

18  o 

28  20 

1841 

19  6 

1934 

20  8 

20  50 

21  50 

21  40 

18.8 

1828 

1850 

19  16 

1946 

2O  22 

21  8 

22  19 

22  0 

18  16 

1837 

19  o 

1927 

1958 

2037 

21  29 

23  2 

22  2O 

18  24 

1846 

19  10 

1938 

20  II 

2053 

21  52 

22  40 

1832 

1855 

19  20 

1950 

2025 

21  II 

22  21 

23  0 

1841 

19  4 

1931 

20  2 

2O  40 

2131 

23  3 

23  20 

1849 

1913 

1941 

20  14 

2056 

2154 

23  27 

1852 

19  17 

1946 

2O  19 

21  2 

22  3 

SMITHSONIAN  TABLES. 


176 


TABLE  61. 

DURATION    OF   SUNSHINE   AT 
DIFFERENT    LATITUDES. 


TABLE    62. 

DECLINATION    OF    THE    SUN 
FOR    THE   YEAR    1894. 


Declination 

I^ATITUDE  NORTH. 

of 

the  Sun. 

71° 

72° 

73° 

74° 

75° 

h.  m. 

h.  m. 

h.  m. 

h.  tn. 

h.  m. 

+  8°  0' 

15  35 

15  50 

16  5 

16  23 

16  44 

8  20 

15  44 

15  59 

16  16 

16  35 

16  57 

8  40 

15  53 

16  9 

16  26 

16  46 

17  10 

9  0 

16  3 

16  19 

16  37 

16  58 

17  23 

9  20 

16  12 

16  29 

16  48 

17  10 

17  37 

9  40 

l6  22 

16  39 

16  59 

17  23 

17  5i 

10  0 

16  31 

16  50 

17  ii 

17  35 

18  5 

10  20 

16  41 

17  o 

17  22 

17  49 

18  20 

10  40 

16  50 

17  ii 

17  34 

18  2 

18  36 

II  0 

17  i 

17  22 

17  47 

18  16 

18  52 

II  20 

17  ii 

17  34 

17  59 

18  31 

19  9 

II  40 

17  22 

17  45 

18  13 

18  46 

19  27 

12  0 

17  32 

17  57 

18  26 

19  i 

19  46 

12  20 

17  43 

18  9 

18  40 

19  18 

20  7 

12  40 

17  55 

18  22 

18  55 

19  35 

20  29 

13  0 

18  6 

18  35 

19  ii 

19  54 

20  55 

13  20 

18  18 

18  49 

19  26 

20  14 

21  23 

13  40 

18  30 

19  2 

19  43 

20  35 

21  59 

14  0 

18  43 

19  17 

20   I 

21   0 

22  50 

14  20 

18  56 

19  33 

20  20 

21  28 

14  40 

19  10 

19  49 

20  41 

22   2 

15  0 

19  24 

20  7 

21  5 

22  52 

15  20 

19  40 

20  26 

21  32 

15  40 

19  55 

20  46 

22   5 

16  0 

20  13 

21  IO 

22  54 

16  20 

20  31 

21  36 

16  40 

20  51 

22   8 

17  0 

21  13 

22  56 

17  20 

21  39 

17  40 

22  II 

76° 

77° 

78° 

79° 

80° 

+  8°  Ox 

17  9 

17  39 

18  16 

19  5 

20  15 

8  20 

17  23 

17  55 

18  35 

19  29 

20  50 

8  40 

17  38 

18  12 

18  56 

19  56 

21  33 

9  0 

17  53 

18  30 

19  17 

20  25 

22  35 

9  29 

18  8 

18  48 

19  41 

20  59 

9  40 

18  25 

19  8 

20   6 

21  40 

10  0 

18  41 

19  28 

20  31 

22  39 

10  20 

18  59 

19  50 

21   6 

10  40 

19  18 

20  15 

21  46 

II  0 

19  38 

2O  41 

22  43 

II  20 

19  59 

21  13 

II  40 

20  23 

21  50 

12  0 

20  49 

22  46 

12  20 

21  19 

12  40 

21  55 

Day  of 
Month. 

Jan. 

Feb. 

Mar. 

I 

-22°  59' 

-17°  V 

-7°29/ 

4 

22  42 

16  8 

6  20 

7 

22  21 

15  13 

5  10 

10 

21  55 

14  15 

4  o 

13 

21  26 

13  15 

2  49 

16 

-20  53 

—12  14 

-i  38 

iq 

20  17 

II  10 

—  o  27 

-7 

21 

19  50 

10  27 

+  0  21 

24 

19  8 

9  21 

I  32 

27 

18  23 

8  14 

2  42 

30 

17  35 

3  52 

Apr. 

May. 

June. 

I 

+  4°  39' 

+15°  10' 

+22°  6' 

4 

5  48 

16  3 

22  28 

7 

6  56 

16  53 

22  47 

10 

8  3 

17  42 

23  3 

13 

9  9 

18  27 

23  14 

16 

+10  13 

+19  10 

+23  22 

*9 

ii  16 

19  50 

23  27 

21 

ii  57 

20  15 

23  27 

24 

12  57 

20  49 

23  25 

27 

13  55 

2\  21 

23  20 

30 

14  5i 

21  49 

23  II 

July. 

Aug. 

Sept. 

i 

+23°  T 

+17°  58' 

+  8°  12' 

4 

22  52 

17  12 

7  6 

7 

22  35, 

l6  22 

5  59 

10 

22  13 

15  30 

4  5i 

13 

21  49 

14  37 

3  42 

16 

+21  21 

+13  4i 

+  2  33 

!9 

20  49 

12  43 

i  23 

21 

20  27 

12  3 

+  o  37 

24 

19  50 

II   2 

—  o  34 

27 

19  II 

9  59 

i  44 

30 

18  28 

8  55 

2  54 

Oct. 

Nov. 

Dec. 

i 

-  3°  17' 

-14°  32' 

-21°  52' 

4 

4  27 

15  28 

22  18 

7 

5  36 

16  22 

22  39 

10 

6  45 

17  14 

22  57 

13 

7  53 

18  3 

23  II 

16 

-  8  59 

-18  49 

-23  21 

19 

10  5 

19  33 

23  26 

21 

10  48 

20  o 

23  27 

24 

ii  5i 

20  37 

23  26 

27 

12  53 

21  12 

23  20 

30 

13  53 

21  42 

23  10 

SMITHSONIAN  TABLES. 


177 


TABLE  63. 

RELATIVE    INTENSITY    OF   SOLAR    RADIATION. 

Mean    vertical    intensity   for   24    hours    of   solar   radiation  /  and    the   solar 
constant   A,   in   terms    of  the    mean    solar  constant   A0. 


Date. 

Motion  of 
the  Sun 
in 
Longitude. 

RELATIVE  MEAN  VERTICAL  INTENSITY  (  ~  j  - 

A 
A0' 

LATITUDE  NORTH. 

0° 

10° 

20° 

30° 

40° 

50° 

60° 

70° 

80° 

90° 

Jan.    i 
16 

o?99 

15.78 

0.303 
.307 

0.265 
.271 

O.22O 

.229 

0.169 
.180 

0.117 
.129 

0.066 
.078 

0.018 
.028 

1-0335 
1.0324 

Feb.    i 
15 

31-54 
45-34 

.312 
•317 

.282 
.293 

.244 
.261 

.200 
.223 

.150 

.177 

.100 
.118 

.048 
.075 

0.006 
.027 

1.0288 
1.0235 

Mar.    i 
16 

59-  14 
73-93 

.320 
.321 

.303 
.313 

.279 
.296 

•245 
.270 

.204 
.236 

.158 
•1-95 

.108 
.148 

.056 

.097 

0.013 
.057 

1.0173 
1.0096 

Apr.    i 
16 

89.70 
104.49 

.317 
•311 

.319 
.321 

.312 
•323 

•295 
•315 

.269 
.297 

.235 
.271 

.195 
.238 

.148 

.201 

.101 

.175 

0.082 
.177 

1.0009 
0.9923 

May    i 
16 

119.29 
134-05 

.303 
.294 

.318 
.318 

•330 

-333 

•329 

•339 

.320 
•337 

.302 
•327 

.278 
.312 

•253 
.298 

.255 

.317 

•259 
.322 

0.9841 
0.9772 

June    i 
16 

149.82 
164.60 

.287 
.283 

.315 
.313 

•334 
.334 

-345 
-348 

•349 
•354 

•345 
.353 

•337 
.348 

•344 
.361 

.360 
.378 

.366 
.384 

0.9714 
0.9679 

/»(?    i 
16 

179-39 
194.13 

.283 
.287 

.312 
.314 

•333 
•332 

•347 
•342 

•  352 
•345 

•351 
•340 

•345 
•329 

•356 

•331 

•373 
•347 

•379 
•352 

0.9666 
0.9674 

Aug.    i 
16 

209.94 
224.73 

.294 
.303 

.'316 
.318 

•330 
.325 

•334 
.322 

•330 
.310 

.318 
.291 

.300 
.264 

.282 
.234 

.295 
.227 

.300 
.231 

0.9709 
0.9760 

S^/.    i 
16 

240.50 
255-29 

.310 
.315 

.318 

.315 

.316 
.305 

•305 
.284 

.285 
.256 

.256 
.220 

.220 

.178 

.180 
.130 

•139 
.107 

.140 
.043 

0.9828 
0.9909 

Otf.      i 
16 

270.07 

284.86 

.317 

.316 

.308 
.298 

.289 
.271 

.261 
.236 

.225 
.194 

.183 
.147 

•135 
.097 

.084 
.047 

.065 
.015 

0-9995 
1.0080 

-Afoz'.    i 
16 

300.63 
315-42 

.312 
.308 

.286 

.276 

.251 
.235 

.211 
.190 

.164 
.140 

.114 
.089 

.063 
.040 

.018 

1.0164 
1.0235 

Zto.    i 
16 

330.I9 

344.98 

.304 
.302 

.267 

.263 

.224 

.218 

•175 
.167 

.124 
•US 

.072 
.064 

.024 
.016 

1.0288 
1.0323 

Fmr..... 

3.305 

0.301 

0.289 

0.268 

0.241 

0.209 

0.173 

0.144 

o.i33 

0.126 

SMITHSONIAN  TABLES. 


I78 


CONVERSION    OF  LJNEAR    MEASURES. 

Inches  into  millimetres , TABLE  64 

Millimetres  into  inches TABLE  65 

Feet  into  metres      .     .     .     .     .     .     .     .     •.     .     .     .     .     .     .  TABLE  66 

Metres  into  feet TABLE  67 

Miles  into  kilometres TABLE  68 

Kilometres  into  miles TABLE  69 

Interconversion  of  nautical  and  statute  miles TABLE  70 

Continental  measures  of  length  with  their  metric  and  English 

equivalents TABLE  71 


179 


TABLE    64. 


INCHES    INTO    MILLIMETRES. 

i  inch  =  25.40005  mm. 


Inches. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0.00 

o.oo 

0.25 

0.51 

0.76 

1.02 

1.27 

1.52 

I.78 

2.03 

2.29 

O.IO 

2.54 

2.79 

3-05 

3.30 

3.56 

3.81 

4.06 

4-32 

4-57 

4.83 

O.2O 

5.08 

5-33 

5-59 

5.84 

6.10 

6-35 

6.60 

6.86 

7.II 

7-37 

0.30 

7.62 

7-87 

8.13 

8.38 

8.64 

8.89 

9.14 

9.40 

9.65 

9.91 

0.40 

10.16 

10.41 

10.67 

10.92 

11.18 

11-43 

11.68 

11.94 

12.19 

12.45 

0.50 

12.70 

12-95 

13-21 

1346 

13.72 

13.97 

14.22 

14.48 

1473 

14.99 

0.60 

15-24 

15-49 

15-75 

16.00 

16.26 

16.51 

16.76 

17.02 

17.27 

17.53 

0.70 

17.78 

18.03 

18.29 

$8.54 

18.80 

19.05 

19.30 

I9-56 

19.81 

20.07 

0.80 

20.32 

20.57 

20.83 

21.08 

21-34 

21-59 

21.84 

22.  IO 

22.35 

22.61 

0.90 

22.86 

23.11 

23-37 

23.62 

23.88 

24.13 

24-38 

24.64 

24.89 

25-15 

1.00 

25.40 

25-65 

25-91 

26.16 

26.42 

26.67 

26.92 

27.18 

27-43 

27.69 

I.IO 

27.94 

28.19 

28.45 

28.70 

28.96 

29.21 

29.46 

29.72 

29.97 

30.23 

1.20 

30.48 

30.73 

30-99 

31.24 

3I-50 

31-75 

32.00 

32.26 

32.51 

32.77 

.30 

33-02 

33-27 

33-53 

33.78 

34-04 

34-29 

34-54 

34-80 

35-05 

35-31 

.40 

35.56 

35-8i 

36.07 

36-32 

36.58 

36-83 

37-oS 

37.34 

37.59 

37.85 

.50 

38.10 

38.35 

38.61 

38.86 

39.12 

39-37 

39-62 

39.88 

40.13 

40.39 

.60 

40.64 

40.89 

4i.i5 

41.40 

41.66 

41.91 

42.16 

42.42 

42.67 

42.93 

.70 

43.18 

43-43 

43-69 

43-94 

44.20 

4445 

44-70 

44.96 

45-21 

4547 

.80 

45-72 

45-97 

46.23 

46.48 

46.74 

46.99 

47-24 

47-50 

47-75 

48.01 

1.90 

48.26 

48.51 

48.77 

49.02 

49.28 

49-53 

49.78 

50.04 

50.29 

50.55 

2.00 

50.80 

51-05 

51-31 

5L56 

51-82 

52.07 

52.32 

52.58 

52.83 

53.09 

2.IO 

53-34 

53-59 

53.85 

54.10 

54.36 

54-6i 

54-86 

55-12 

55-37 

55.63 

2.2O 

55-88 

56.13 

56.39 

56.64 

56.90 

57.15 

57-40 

57.66 

57-91 

58.17 

2.30 

58-42 

58.67 

58.93 

59-i8 

59.44 

59-69 

59-94 

60.20 

60.45 

60.71 

2.40 

60.96 

61.21 

61.47 

61.72 

61.98 

62.23 

62.48 

62.74 

62.99 

63-25 

2.50 

63-50 

63.75 

64.01 

64.26 

64.52 

64-77 

65.02 

65.28 

65.53 

65.79 

2.60 

66.04 

66.29 

66.55 

66.80 

67.06 

67.31 

67-56 

67.82 

68.07 

68.33 

2.70 

68.58 

68.83 

69.09 

69-34 

69.60 

69.85 

70.10 

70.36 

70.61 

70.87 

2.80 

71.12 

71-37 

71.63 

71.88 

72.14 

72.39 

72.64 

72.90 

73-15 

7341 

2.90 

73-66 

73-91 

74-17 

74-42 

74-68 

74.93 

75-iS 

7544 

75.69 

75-95 

3.00 

76.20 

76.45 

76.71 

76.96 

77.22 

7747 

77.72 

77.98 

78-23 

78.49 

3.10 

78.74 

78.99 

79.25 

79-50 

79.76 

80.01 

80.26 

80.52 

80.77 

81.03 

3.20 

81.28 

8i.53 

8i.79 

82.04 

82.30 

82.55 

82.80 

83.06 

83-31 

83.57 

3-30 

83.82 

84.07 

84.33 

84-59 

84.84 

85.09 

85.34 

85.60 

85-85 

86.11 

340 

86.36 

86.61 

86.87 

87.12 

87.38 

87-63 

87.88 

88.14 

88.39 

88.65 

3.50 

88.90 

89-15 

89.41 

89.66 

89.92 

90.17 

90.42 

90.68 

90-93 

91.19 

3-6o 

91.44 

91.69 

9I-95 

92.20 

92.46 

92.71 

92.96 

93.22 

9347 

9373 

3-70 

93.98 

94-23 

94-49 

94.74 

95-00 

95-25 

95-50 

95.76 

96.01 

96.27 

3.80 

96-52 

96.77 

97-03 

97.28 

97-54 

97-79 

98.04 

98.30 

98-55 

98.81 

3-90 

99.06 

99-31 

99-57 

99-82 

100.08 

100.33 

100.58 

100.84 

101.09 

101.35 

4.00 

101.60 

101.85 

102.  1  1 

102.36 

102.62 

102.87 

103.12 

103.38 

103.63 

103.89 

4.10 

104.14 

104.39 

104.65 

104.90 

105.16 

105.41 

105.66 

105.92 

106.17 

106.43 

4.20 

106.68 

106.93 

107.19 

107.44 

107.70 

107-95 

108.20 

108.46 

108.71 

108.97 

4.30 

109.22 

109.47 

109.73 

109.98 

110.24 

110.49 

110.74 

III.OO 

111.25 

111.51 

4.40 

111.76 

112.01 

112.27 

112.52 

112.78 

113-03 

113.28 

H3.54 

113-79 

114.05 

4.50 

114.30 

H4-55 

II4.8I 

115.06 

115-32 

H5-57 

115-82 

116.08 

116.33 

116.59 

4.60 

116.84 

117.09 

117-35 

117.60 

117.86 

ii8.ii 

118.36 

118.62 

118.87 

119.13 

4.70 

119.38 

119.63 

119.89 

120.14 

120.40 

120.65 

120.90 

121.  l6 

121.41 

121.67 

4.80 

121.92 

122.17 

122.43 

122.68 

122.94 

123.19 

123.44 

123.70 

123-95 

124.21 

4.90 

124.46 

124.71 

124.97 

125.22 

125.48 

125-73 

125.98 

126.24 

126.49 

126.75 

5.00 

127.00 

127.25 

127.51 

127.76 

128.02 

128.27 

128.52 

128.78 

129.03 

129.29 

P          t'  nal  Parts       Incfo.      o.ooi       0.002      0.003      0.004      0.005      0.006      0.007      0.008      0.009 

mm.     0.025      0.051      0.076      0.102      0.127      0.152      0.178      0.203      0.229 

SMITHSONIAN  TABLES. 


180 


TABLE  64. 


INCHES    INTO    MILLIMETRES. 

i  inch  =  25. 40005  mm. 


Inches. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

5.00 

127.00 

127.25 

127.51 

127.76 

128.02 

128.27 

128.52 

128.78 

129.03 

129.29 

5.10 

129-54 

129.79 

130.05 

130.30 

130.56 

130.81 

131.06 

131.32 

131.57 

131.83 

5.20 

132.68 

132.33 

132.59 

132.84 

133.10 

133-35 

133.60 

133.86 

134.11 

134.37 

5-3° 

134.62 

134.87 

135.13 

135.38 

I35.64 

135.89 

136.14 

136.40 

136.65 

136.91 

540 

137.16 

137.41 

137.67 

137.92 

138.18 

138.43 

138.68 

138.94 

139.19 

139.45 

5.50 

139.70 

139-95 

140.21 

140.46 

140.72 

140.97 

141.22 

141.48 

I4L73 

141.99 

5-6o 

142.24 

142.49 

142.75 

143.00 

143.26 

143.51 

143.76 

144.02 

144.27 

144.53 

5-7o 

144.78 

I45.03 

145.29 

145-54 

145.80 

146.05 

146.30 

146.56 

146.81 

147.07 

5-8o 

147.32 

M7.57 

147.83 

148.08 

148.34 

148.59 

148.84 

149.10 

149.35 

149.61 

5-90 

149.86 

150.11 

150.37 

150.62 

150.88 

I5LI3 

I5L38 

151.64 

151-89 

152.15 

6.00 

152.40 

152.66 

152.91 

I53.I6 

153.42 

153.67 

I53.92 

I54.I8 

154-43 

154.69 

6.10 

154.94 

I55.I9 

155.45 

I55.70 

I55.96 

156.21 

156.46 

156.72 

T56.97 

157.23 

6.2O 

157.48 

157.73 

157-99 

158.24 

158.50 

158.75 

159.00 

159.26 

159.51 

159-77 

6.30 

160.02 

160.27 

160.53 

160.78 

161.04 

161.29 

161.54 

161.80 

162.05 

162.31 

640 

162.56 

162.81 

163.07 

163.32 

163.58 

163.83 

164.08 

164.34 

164.59 

164.85 

6.50 

165.10 

165.35 

165.61 

165.86 

166.  12 

166.37 

166.62 

166.88 

167.13 

167.39  1 

6.60 

167.64 

167.89 

168.15 

168.40 

168.66 

168.91 

169.16 

169.42 

169.67 

169.93 

6.70 

170.18 

170.43 

170.69 

170.94 

171.20 

I7L45 

171.70 

171.96 

172.21 

172.47 

6.80 

172.72 

172.97 

173.23 

I73.48 

173.74 

173.99 

174.24 

174.50 

174-75 

175.01 

6.90 

175.26 

175.51 

175-77 

176.02 

176.28 

176.53 

176.78 

177.04 

177.29 

177-55 

7.00 

177.80 

178.05 

178.31 

178.56 

178.82 

179.07 

179.32 

I79.58 

I79.83 

180.09 

7.10 

180.34 

180.59 

180.85 

181.10 

181.36 

181.61 

181.86 

182.12 

182.37 

182.63 

7.20 

182.88 

183.13 

183.39 

183.64 

183.90 

184.15 

184.40 

184.66 

184.91 

185.17 

7.30 

185.42 

185.67 

185.93 

186.18 

186.44 

186.69 

186.94 

187.20 

187.45 

187.71 

7.40 

187.96 

188.21 

188.47 

188.72 

188.98 

189.23 

189.48 

189.74 

189.99 

190.25 

7.50 

190.50 

190.75 

191.01 

191.26 

191-52 

191.77 

192.02 

192.28 

192.53 

192.79 

7.60 

193.04 

193.29 

193.55 

193.80 

194.06 

I94.3I 

194.56 

194.82 

195.07 

195.33 

7.70 

I95.58 

195.83 

196.09 

196.34 

196.60 

196-85 

197.10 

197.36 

197.61 

197.87 

7.80 

198.12 

198.37 

198.63 

198.88 

199.14 

J99-39 

199.64 

199.90 

200.15 

200.41 

7.90 

2OO.66 

200.91 

201.17 

201.42 

201.68 

201.93 

202.  l8 

202.44 

202.69 

202.95 

8.00 

203.20 

203.45 

203.71 

203.96 

204.22 

204.47 

204.72 

204.98 

205.23 

205.49 

8.10 

205.74 

205.99 

206.25 

206.50 

206.  76 

207.01 

207.26 

207.52 

207.77 

208.03 

8.20 

208.20 

208.53 

208.79 

209.04 

209.30 

209.55 

209.80 

210.06 

210.31 

210.57 

8.30 

210.82 

2II.O7 

211-33 

211.58 

211.84 

212.09 

212.34 

212.60 

212.85 

213.11 

8.40 

213.36 

213.61 

213.87 

214.12 

214.38 

214.63 

214.88 

215.14 

215-39 

215.65 

8.50 

215.90 

216.15 

216.41 

216.66 

216.92 

217.17 

217.42 

217.68 

217.93 

218.19 

8.60 

218.44 

218.69 

218.95 

219.20 

219.46 

219.71 

219.96 

220.22 

220.47 

220.73 

8.70 

220.98 

221.23 

221.49 

221.74 

222.00 

222.25 

222.50 

222.76 

223.01 

223.27 

8.80 

223.52 

223.77 

224.03 

224.28 

224.54 

224.79 

225.04 

225.30 

225.55 

225.81 

8.90 

226.06 

226.31 

226.57 

226.82 

227.08 

227.33 

227.58 

227.84 

228.09 

228.35 

9.00 

228.60 

228.85 

229.11 

229.36 

229.62 

229.87 

230.12 

230.38 

230.63 

230.89 

9.10 

231.14 

23L39 

231-65 

231.90 

232.16 

232.41 

232.66 

232.92 

233.I7 

233-43 

9.20 

233.68 

233.93 

234.19 

234-44 

234.70 

234.95 

235.20 

235.46 

235.71 

235-97 

9-30 

236.22 

236.47 

236.73 

236.98 

237-24 

237.49 

237.74 

238.00 

238.25 

238.51 

9.40 

238.76 

239.01 

239.27 

239.52 

239.78 

240.03 

240.  28 

240.54 

240.79 

24L05 

9.50 

241.30 

24L55 

241.81 

242.06 

242.32 

242.57 

242.82 

243.08 

243-33 

243.59 

9.60 

243.84 

244.09 

244-35 

244.60 

244.86 

245.11 

245.36 

245.62 

245.87 

246.13 

9.70 

246.38 

246.63 

246.89 

247.14 

247.40 

247-65 

247.90 

248.16 

248.41 

248.67 

9.80 

248.92 

249.17 

249-43 

249.68 

249-94 

250.19 

250.44 

250.70 

250.95 

251.21 

9.90 

251.46 

251.71 

25L97 

252.22 

252.48 

252.73 

252.98 

253.24 

25349 

253-75 

10.00 

254.00 

254.25 

254.51 

254.76 

255.02 

255.27 

255.52 

255.78 

256.03 

256.29 

Prooort'      1  P    t       Incll«    °-001      °-°°2      °-003      °-°°4      °-°°5      °-°°6      °-°°7      °-°°8      °-°°9 

mm.     0.025      0.051      0.076      0.102      0.127      0.152      0.178      0.203      0.229 

SMITHSONIAN  TABLES. 


181 


TABLE   64. 


INCHES    INTO    MILLIMETRES. 

i  inch  =  25.40005  mm. 


Inches. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

10.00 

254.00 

254.25 

254.51 

254.76 

255-02 

255.27 

255.52 

255.78 

256.03 

256.29 

10.10 

256.54 

256.79 

257.05 

257.30 

257-56 

257-Sl 

258.06 

258.32 

258.57 

258.83 

10.20 

259.08 

259.33 

259-59 

259.84 

260.  10 

260.35 

260.60 

260.86 

26l.il 

261.37 

10.30 

261.62 

261.87 

262.!., 

262.38 

262.64 

262.89 

263.14 

263.40 

263.65 

263.91 

10.40 

264.16 

264.41 

264.6^ 

264.92 

265.18 

265.43 

265.68 

265.94 

266.19 

266.45 

10.50 

266.  70 

266.95 

267.21 

267.46 

267.72 

267.97 

268.22 

268.48 

268.73 

268.99 

10.60 

269.24 

269.49 

269.75 

279.00 

270.26 

270.51 

270.76 

271.02 

271.27 

271.53 

10.70 

271.78 

272.03 

272.29 

272.54 

272.80 

273.05 

273.30 

273.56 

273.81 

274.07 

10.80 

274.32 

274.57 

274-93 

275.08 

275-34 

275.59 

275.84 

276.10 

276.35 

276.61 

10.90 

276.86 

277.11 

277.37 

277.62 

277:88 

278.13 

278.38 

278.64 

278.89 

279.I5 

11.00 

279.40 

279.65 

279.91 

280.16 

280.42 

280.67 

280.  92 

281.18 

281.43 

281.69 

II.  10 

281.94 

282.19 

282.45 

282.70 

282.96 

283.21 

283.46 

283.72 

283.97 

284.23 

11.20 

284.48 

284.73 

284.99 

285.24 

285.50 

285.75 

286.00 

286.26 

286.51 

286.77 

H.30 

287.02 

287.27 

287.53 

287.78 

288.04 

288.29 

288.54 

288.80 

289.05 

289.31 

11.40 

289.56 

289.81 

290.07 

290.32 

290.58 

290.83 

291.08 

29L34 

29L59 

291-85 

11.50 

292.10 

292.35 

292.61 

292.86 

293.12 

293.37 

293.62 

293.88 

294.13 

294.39 

1  1.  60 

294.64 

294.89 

295.15 

295.40 

295.66 

295-91 

296.16 

296.42 

296.67 

296.93 

11.70 

297.18 

297.43 

297.69 

297.94 

298.20 

298.45 

298.70 

298.96 

299.21 

299.47 

11.80 

299.72 

299.97 

300.23 

300.48 

300.74 

300.99 

301.24 

301.50 

301.75 

302.01 

11.90 

302.26 

302.51 

302.77 

303-02 

303.28 

303.53 

303.78 

304.04 

304.29 

304.55 

12.00 

304.80 

305.05 

305-3I 

305.56 

305.82 

306.07 

306.32 

306.58 

306.83 

307.09 

I2.IO 

307.34 

307.59 

307.85 

308.  10 

308.36 

308.61 

308.86 

309.12 

309.37 

309.63 

I2.2O 

309.88 

310.13 

310.39 

310.64 

310.90 

3H.I5 

311.40 

311.66 

311.91 

312.17 

12.30 

312.42 

312.67 

312.93 

313.18 

313.44 

3I3.69 

313.94 

314.20 

314.45 

3H.7I 

12.40 

3M.96 

S^-ai 

3I5.47 

315-72 

315.98 

316.23 

316.48 

316.74 

316.99 

317.25 

12.50 

317.50 

317.75 

318.01 

318.26 

318.52 

318.77 

319.02 

319.28 

319.53 

319.79 

12.60 

320.04 

320.29 

320.55 

320.80 

321.06 

32L31 

32L56 

321.82 

322.07 

322.33 

12.70 

322.58 

322.83 

323.09 

323.34 

323.60 

323.85 

324.10 

324.36 

324.61 

324.87 

12.80 

325.I2 

325.37 

325.63 

325.88 

326.  14 

326.39 

326.64 

326.90 

327.I5 

327.41 

12.90 

327.66 

327.91 

328.17 

328.42 

328.68 

328.93 

329.18 

329.44 

329.69 

329-95 

13.00 

330.20 

330.45 

330.71 

330.96 

331.22 

33L47 

331.72 

33L98 

332.23 

332.49 

13.10 

332.74 

332.99 

333-25 

333-50 

333.76 

334.01 

334-26 

334-52 

334-77 

335.03 

13.20 

335.28 

335-53 

335-79 

336.04 

336.30 

336.55 

336.80 

337.06 

337.31 

337.57 

I3-30 

337.82 

338.07 

338.33 

338.58 

338.84 

339-09 

339-34 

339.60 

339-85 

340.11 

13.40 

340.36 

340.61 

340.87 

341.12 

341.38 

341.63 

341.88 

342.14 

342.39 

342.65 

13.50 

342.90 

343-15 

34341 

343.66 

343.92 

344-17 

344-42 

344.68 

344-93 

345.19 

13.60 

345-44 

345.69 

345-95 

346.20 

346.46 

346.71 

346.96 

347.22 

347-47 

347-73 

13.70 

347.98 

348.23 

348.49 

348.74 

349-0° 

349-25 

349.50 

349.76 

350.01 

350.27 

13.80 

350.52 

350-77 

351-03 

351.28 

35L54 

351-79 

352.04 

352.30 

352.55 

352.8i 

13.90 

353.06 

353.31 

353-57 

353.82 

354.o8 

354-33 

354.58 

354.84 

355.09 

355-35 

14.00 

355.60 

355.85 

356.li 

356.36 

356.62 

356.87 

357-12 

357.38 

357.63 

357.89 

14.10 

358.14 

358.39 

358.65 

358.90 

359-  l6 

359-41 

359-66 

359.92 

360.17 

360.43 

14.20 

360.68 

360.93 

361.19 

361.44 

361.70 

36i.95 

362.20 

362.46 

362.71 

362.97 

14.30 

363.22 

363.47 

363-73 

363.98 

364.24 

364-49 

364.74 

365.00 

365-25 

365-51 

14.40 

365.76 

366.01 

366.27 

366.52 

366.78 

367-03 

367.28 

367.54 

367.79 

368.05 

14.50 

368.30 

368.55 

368.81 

369.06 

369-32 

369-57 

369.82 

370.08 

370.33 

370.59 

14.60 

370.84 

371.09 

371-35 

371.60 

371.86 

372.ii 

372.36 

372.62 

372.87 

373.13 

14.70 

373.38 

373.63 

373.89 

374.14 

374.40 

374.65 

374.90 

375.16 

375-41 

375.67 

14.80 

375-92 

376.17 

376.43 

376.68 

376.94 

377.19 

377-44 

377.70 

377.95 

378.21 

14.90 

378.46 

378.71 

378.97 

379-22 

379.48 

379-73 

379.98 

380.24 

380.49 

380.75 

15.00 

381.00 

381-25 

381.51 

381.76 

382.02 

382.27 

382.52 

382.78 

383.03 

383-29 

_                                    Inch,     o.ooi       0.002      0.003      0.004      °-°°5      °.006      °-°°7      °-°°8      °-°°9 

Prooortional  Parts 

mm.     0.025      0.051      0.076      0.102      0.127      0.152      0.178      0.203      0.229 

SMITHSONIAN  TABLES. 


182 


INCHES    INTO    MILLIMETRES. 

i  inch  =  25.40005  mm. 


TABLE  64. 


Inches. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

15.00 

381.00 

381.25 

38I.5I 

381.76 

382.02 

382.27 

382.52 

382.78 

383-03 

383-29 

15.10 

383.54 

383.79 

384-05 

384.30 

384.56 

384-81 

385-06 

385.32 

385.57 

385-83 

15.20 

386.08 

386.33 

386.59 

386.84 

387.10 

387.35 

387.60 

387.86 

388.11 

388.37 

I5-30 

388.62 

388.87 

389.13 

389.38 

389.64 

389-89 

390.14 

390.40 

390.65 

390.91 

15.40 

391.16 

391.41 

391.67 

391.92 

392.18 

392-43 

392.68 

392.94 

393.19 

393-45 

15.50 

393-70 

393-95 

394-21 

394-46 

394.72 

394.97 

395-22 

395.48 

395-73 

395-99 

15.60 

396.24 

39.649 

396.75 

397-00 

397-26 

397.51 

397.76 

398.02 

398.27 

398.53 

15-70 

398.78 

399-03 

399.29 

399-54 

399.80 

400.05 

400.30 

400.56 

400.81 

401.07 

15.80 

401.32 

401.57 

401.83 

402.08 

402.34 

402.59 

402.84 

403.10 

403-35 

403.61 

15.90 

403.86 

404.11 

404.37 

404.62 

404.88 

405.13 

405.38 

405-64 

405-89 

406.15 

16.00 

406.40 

406.65 

406.91 

407.16 

407.52 

407.67 

407.92 

408.18 

408.43 

408.69 

16.10 

408.94 

409.19 

409.45 

409.70 

409.96 

410.21 

410.46 

410.72 

410.97 

411.23 

16.20 

411.48 

4II-73 

411.99 

412.24 

412.50 

412.75 

413.00 

413.26 

413-51 

413.77 

16.30 

414.02 

414.27 

414.53 

414.78 

415.04 

4I5-29 

4I5.54 

415.80 

416.05 

416.31 

16.40 

416.56 

416.81 

417.07 

417.32 

417.58 

417.83 

418.08 

418.34 

418.59 

418-85 

16.50 

419.10 

4I9-35 

419.61 

419.86 

420.12 

420.37 

420.62 

420.88 

421.13 

421.39 

16.60 

421.64 

421.89 

422.15 

422.40 

422.66 

422.91 

423.16 

423.42 

423.67 

423.93 

16.70 

424.18 

424.43 

424.69 

424.94 

425.20 

425.45 

425.70 

425.96 

426.21 

426.47 

16,80 

426.72 

426.97 

427.23 

427.48 

427.74 

427.99 

428.24 

428.50 

428.75 

429.01 

16.90 

429.26 

429.51 

429.77 

430.02 

430.28 

430.53 

430.78 

431-04 

431.29 

43L55 

17.00 

431.80 

432.05 

432.31 

432.56 

432.82 

433.07 

433-32 

433-58 

433.83 

434.09 

17.10 

434-34 

434.59 

434.85 

435-10 

435.36 

435-61 

435-86 

436.12 

436.37 

436.63 

17.20 

436.88 

437-13 

437-39 

437.64 

437.90 

438.15 

438.40 

438.66 

438-91 

439-  1  7 

17.30 

439-42 

439.67 

439-93 

440.18 

440.44 

440.69 

440-94 

441.20 

441-45 

441.71 

17.40 

441.96 

442.21 

442.47 

442.72 

442.98 

443.23 

443-48 

443-74 

443-99 

444-25 

17.50 

444-50 

444-75 

445-01 

445.26 

445-52 

445.77 

446.02 

446.28 

446.53 

446.79 

17.60 

447.04 

447-29 

447-55 

447.80 

448.06 

448.31 

448.56 

448.82 

449.07 

449-33 

17.70 

449.58 

449-83 

450.09 

450-34 

450.60 

450.85 

451.10 

451.36 

451.61 

45I-87 

17.80 

452.12 

452-37 

452.63 

452.88 

453-14 

453-39 

453-64 

453-9° 

454-15 

454-41 

17.90 

454.66 

454-91 

455-17 

455-42 

455.68 

455.93 

456.18 

456.44 

456.69 

456.95 

18.00 

457.20 

457-45 

457.71 

457.96 

458.22 

458.47 

458.72 

458.98 

459-23 

459-49 

18.10 

459-74 

459-99 

460.25 

460.50 

460.76 

461.01 

461.26 

461.52 

461.77 

462.03 

18.20 

462.28 

462.53 

462.79 

463.04 

463.30 

463.55 

463.80 

464.06 

464.31 

464.57 

18.30 

464.82 

465.07 

465.33 

465.58 

465.84 

466.09 

466.34 

466.60 

466.85 

467.11 

18.40 

467.36 

467.61 

467.87 

468.12 

468.38 

468.63 

468.88 

469.14 

469-39 

469.35 

18.50 

469.90 

470.15 

470.41 

470.66 

470.92 

471.17 

471.42 

471.68 

47L93 

472.19 

18.60 

472.44 

472.69 

472.95 

473-20 

473.46 

473-71 

473-96 

474.22 

474-47 

474.73 

18.70 

474.98 

475-23 

475-49 

475-74 

476.00 

476.25 

476.50 

476.76 

477-01 

477.27 

18.80 

477-52 

477-77 

478.03 

478.28 

478.54 

478.79 

479.04 

479.30 

479-55 

479.81 

18.90 

480.06 

480.31 

480.57 

480.82 

481.08 

48i.33 

481-58 

481.84 

482.09 

482.35 

19.00 

482.60 

482.85 

483.11 

483-36 

483.62 

483.87 

484.12 

484.38 

484.63 

484.89 

19.10 

485.14 

485.39 

485-65 

485.90 

486.16 

486.41 

486.66 

486.92 

487.17 

48743 

19.20 

487.68 

487.93 

488.  19 

488.44 

488.70 

488.95 

489.20 

489.46 

489.71 

489.97 

19.30 

490.22 

490.47 

490.73 

490.98 

491.24 

491.49 

491.74 

492.00 

492-25 

492.51 

19.40 

492.76 

493-01 

493-27 

493-52 

493-78 

494-03 

494.28 

494-54 

494-79 

495-05 

19.50 

495.30 

495-55 

495-8i 

496.06 

496.32 

496.57 

496.82 

497.08 

497-33 

497-59 

19.60 

497.84 

498.09 

498.35 

498.60 

498.86 

499.11 

499-36 

499.62 

499.87 

500.13 

19.70 

500.38 

500.34 

500.89 

501.14 

501.40 

501-65 

501.91 

502.16 

502.41 

502.67 

19.80 

502.92 

503.18 

503.43 

503.68 

503.94 

504-19 

504.45 

504.70 

504.95 

505-21 

19.90 

505-46 

505-72 

505.97 

506.22 

506.48 

506.73 

506.99 

507.24 

507.49 

507.75 

20.00 

508.00 

508.26 

508.51 

508.76 

509.02 

509.27 

509.53 

509-78 

510.03 

510.29 

Proportional  Parts     Incl1'    °'001      °'°02     °'°°3     °'0°4     °'0°5      °'°°6     °'0°7     °'°°8     °'°°9 

mm.     0.025      0.051      0.076      0.102      0.127      0.152      0.178      0.203      0.229 

SMITHSONIAN  TABLES. 


183 


TABLE  64. 


INCHES    INTO    MILLIMETRES. 

i  inch  =  25.40005  mm. 


Inches. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

20.00 

508.00 

508.26 

508.51 

508.76 

509.02 

509.27 

509.53 

509.78 

510.03 

510.29 

20.10 

510.54 

510.80 

5H.05 

5H.30 

5H.56 

5H.8l 

512.07 

512.32 

512.57 

512.83 

20.20 

513.08 

5I3.34 

513.59 

513.84 

5I4.IO 

514.35 

514.61 

514.86 

SIS-" 

5I5.37 

20.30 

5I5.62 

515.88 

516.13 

516.38 

516.64 

516.89 

517.15 

517.40 

517.65 

5I7.9I 

20.40 

518.16 

518.42 

518.67 

518.92 

519.18 

5I9-43 

5I9-69 

5I9.94 

520.19 

520.45 

20.50 

520.70 

520.96 

521.21 

521.46 

521.72 

521.97 

522.23 

522.48 

522.73 

522.99 

20.60 

523.24 

523.50 

523.75 

524.00 

524.26 

524.51 

524.77 

525.02 

525.27 

525.53 

20.70 

525.78 

526.04 

526.29 

526.54 

526.80 

526.95 

527.31 

527.56 

527.81 

528.07 

20.80 

528.32 

528.58 

528.83 

529.08 

529.34 

529.59 

5?9.85 

530.10 

530.35 

530.61 

20.90 

530.86 

53LI2 

531-37 

531.62 

53L88 

532.13 

532.39 

532.64 

532.89 

533-15 

21.00 

533-40 

533.66 

533-91 

534.16 

534.42 

534.67 

534-93 

535.18 

535-43 

535.69 

21.10 

535-94 

536.20 

536.45 

536.70 

536.96 

537-21 

537.47 

537.72 

537.98 

538.23 

21.20 

538.48 

538.74 

538.99 

539-24 

539-50 

539-75 

540.01 

540.26 

540.51 

540.77 

21.30 

541.02 

54L28 

541-53 

54L78 

542.04 

542.29 

542.55 

542.80 

543-05 

543.31 

21.40 

543.56 

543.82 

544.07 

544.32 

544.58 

544.83 

545.09 

545-34 

545.59 

545.85 

21.50 

546.10 

546.36 

546.61 

546.86 

547-12 

547-37 

547.63 

547-88 

548.13 

548.39 

21.60 

548.64 

548.90 

549-  J5 

54940 

549.66 

549-91 

550.17 

550.42 

550.67 

550.93 

21.70 

551.18 

551-44 

551-69 

55L94 

552.20 

552.45 

552.71 

552.96 

553.21 

553-47 

21.80 

553.72 

553.98 

554.23 

55448 

554.74 

554.99 

555.25 

555-50 

555-75 

556.oi 

21.90 

556.26 

556.52 

556.77 

557-02 

557.28 

557-53 

557-79 

558.04 

558.29 

558.55 

22.00 

558.80 

559-o6 

559.31 

559.56 

559-82 

560.07 

560.03 

560.58 

560.83 

561.09 

22.  IO 

561.34 

561.60 

561.85 

562.10 

562.36 

562.61 

562.87 

563-12 

563-37 

563.63 

22.2O 

563.88 

564.14 

564.39 

564.64 

564.90 

565-15 

56541 

565-66 

565-91 

566.17 

22.30 

566.42 

566.68 

566.93 

567.18 

567.44 

567.69 

567.95 

568.20 

568.45 

568.71 

22.40 

568.96 

569-22 

569.47 

569.72 

569.98 

570.23 

570.49 

570.74 

570.99 

57L25 

22.50 

57L50 

57L76 

572.01 

572.26 

572.52 

572.77 

573.03 

573-28 

573-53 

573-79 

22.60 

574-04 

574-30 

574-55 

574.80 

575.o6 

575-31 

575-57 

575-82 

576.07 

576.33 

22.70 

576.58 

576.84 

577.09 

577.34 

577.6o 

577.95 

578.ii 

578.36 

578.61 

578.87 

22.80 

579-12 

579.38 

579-63 

579-88 

580.14 

580.39 

580.65 

580.90 

581.15 

581.41 

22.90 

581.66 

581.92 

582.17 

582.42 

582.68 

582.93 

583-19 

58344 

583.69 

583.95 

23.00 

584.20 

584-46 

584-71 

584.96 

585-22 

585.47 

585.73 

585-98 

586.23 

586.49 

23.10 

586.74 

587-00 

587-25 

587-50 

587-76 

588.01 

588.27 

588.52 

588.77 

589.03 

23.20 

589.28 

589.54 

589.79 

590.04 

590-30 

590.55 

590.81 

591.06 

59L3I 

59^57 

23-30 

591-82 

592.08 

592.33 

592.58 

592.84 

593.09 

593-35 

593.6o 

593.85 

594.ii 

23.40 

594.36 

594-62 

594.87 

595.12 

595.38 

595.63 

595.89 

596.14 

596.39 

596-65 

23.50 

596.90 

597-16 

597-41 

597.66 

597-92 

598.17 

598.43 

598.68 

598.93 

599-  19 

23.60 

599-44 

599-70 

599-95 

600.20 

600.46 

600.71 

600.97 

601.22 

601.47 

601.73 

23.70 

601.98 

602.24 

602.49 

602.74 

603.00 

603.25 

603.51 

603.76 

604.01 

604.27 

23.80 

604.52 

604.78 

605.03 

605.28 

605.54 

605.79 

606.05 

606.30 

606.55 

606.81 

23.90 

607.06 

607.32 

607.57 

607.82 

608.08 

608.33 

608.59 

608.84 

609.09 

609.35 

24.00 

609.60 

609.86 

6io.n 

610.36 

610.62 

610.87 

611.13 

611.38 

611.63 

611.89 

24.10 

612.14 

612.40 

612.65 

612.90 

613.16 

613.41 

613.67 

613.92 

614.17 

614-43 

24.20 

614.68 

614.94 

615.19 

615.44 

615.70 

615.95 

616.21 

616.46 

616.71 

616.97 

24.30 

617.22 

617.48 

6i7.73 

617.98 

618.24 

618.49 

618.75 

619.00 

619-25 

619.51 

24.40 

619.76 

620.02 

620.27 

620.52 

620.78 

621.03 

621.29 

621.54 

621.79 

622.05 

24.50 

622.30 

622.56 

622.81 

623.06 

623.32 

623.57 

623.83 

624.08 

624.33 

624.59 

24.60 

624.84 

625.10 

625.35 

625.60 

625.86 

626.11 

626.37 

626.62 

626.87 

627.13 

24.70 

627.38 

627.64 

627.89 

628.14 

628.40 

628.65 

628.91 

629.16 

629.41 

629.67 

24.80 

629.92 

630.10 

630.43 

630.68 

630.94 

631.19 

631-45 

631.70 

631-95 

632.21 

24.90 

632.46 

632.72 

632.97 

633-22 

633.48 

633-73 

633.99 

634.24 

634.49 

634.75 

25.00 

635-00 

635.26 

635-51 

635-76 

636.02 

636.27 

636.53 

636.78 

637-03 

637.29 

ProDort'      1  P    t       Inch*    °-001      °-002     °.°°3     °-°°4     °-°°5     °-°°6     °-°°7      0.008      0.009 

mm.     0.025      0.051      0.076      0.102      0.127      0.152      0.178      0.203      °>229 

SMITHSONIAN  TABL£«. 


184 


TABLE  64 


INCHES    INTO    MILLIMETRES. 

i  inch  =  25.40005  mm. 


Inches. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

25.00 

635.00 

635-26 

635.51 

635.76 

636.02 

636.27 

636.53 

636.78 

637.03 

637.29 

25.10 

637-80 

638.05 

638.30 

638.56 

638.81 

639.07 

639.32 

639-57 

639.83 

25.20 

640.08 

640.34 

640.59 

640.84 

641.10 

64L35 

641.61 

641.86 

642.11 

642.37 

25-30 

642.62 

642.88 

643.13 

643.38 

643-64 

643.89 

644.15 

644.40 

644-65 

644.91 

25.40 

645.16 

645.42 

645.67 

645.92 

646.  18 

646.43 

646.69 

646.94 

647.19 

64745 

25.50 

647.70 

647.96 

648.21 

648.46 

648.72 

648.97 

649-23 

649.48 

649-73 

649.99 

25.60 

650.24 

650.50 

650.75 

651.00 

651.26 

65L5I 

65L77 

652.02 

654.27 

652.53 

25.70 

652.78 

653.04 

653.29 

653-54 

653-80 

654.05 

654.31 

654.56 

654-81 

655.07 

25-80 

655-32 

655.58 

655.83 

656.08 

656.34 

656.59 

656.85 

657.10 

657.35 

657.61 

25.90 

657-86 

658.12 

658.37 

658.62 

658.88 

659-I3 

659-39 

659.89 

660.15 

26.00 

660.40 

660.66 

660.91 

661.16 

661.42 

661.67 

661.93 

662.18 

662.43 

662.69 

26.10 

662.94 

663.20 

663.45 

663.70 

663.96 

664.21 

664.47 

664.72 

664.97 

665.23 

26.20 

665.48 

665.74 

665.99 

666.24 

666.50 

666.75 

667.01 

667.26 

667.51 

667.77 

26.30 

668.02 

668.28 

668.53 

668.78 

669.04 

669.29 

669-55 

669.80 

670.05 

670.31 

26.40 

670.56 

670.82 

671.07 

671.32 

671.58 

671.83 

672.09 

672.34 

672.59 

672.85 

26.50 

673.10 

673.36 

673.61 

673-86 

674.12 

674.37 

674.63 

674.88 

675.13 

675-39 

26.60 

675.64 

675.90 

676.15 

676.40 

676.66 

676.91 

677.17 

677.42 

677.67 

677-93 

26.70 

678.18 

678.44 

678.69 

678.94 

679.20 

679.45 

679.71 

679.96 

680.21 

680.47 

26.80 

680.72 

680.98 

681.23 

681.48 

681.74 

681.99 

682.25 

682.50 

682.75 

683.01 

26.90 

683.26 

683.52 

683.77 

684.02 

684.28 

684.53 

684.79 

685.04 

685.29 

685.55 

27.00 

685.80 

686.06 

686.31 

686.56 

686.82 

687.07 

687.33 

687.58 

687.83 

688.09 

27.10 

688.34 

688.60 

688.85 

689.  10 

689.36 

689.61 

689.87 

690.12 

690.37 

690.63 

27.20 

690.88 

691.14 

691.39 

691.64 

691.90 

692.15 

692.41 

692.66 

692.91 

693.17 

27.30 

693.42 

693.68 

693.93 

694.  18 

694.44 

694.69 

694.95 

695.  20 

69545 

695.71 

27.40 

695.96 

696.22 

696.47 

696.72 

696.98 

697-23 

69749 

697.74 

697.99 

698.25 

27.50 

698.50 

698.76 

699.01 

699.  26 

699.52 

699.77 

700.03 

700.28 

700.53 

700.79 

27.60 

701.04 

701.30 

701.55 

701.80 

702.06 

702.21 

702.57 

702.82 

703-07 

703.33 

27.70 

703-58 

703.84 

704.09 

704.34 

704.60 

704-85 

705.11 

705.36 

705.61 

705.87 

27.80 

706.12 

706.38 

706.63 

706.88 

707.14 

707.39 

707.65 

707.90 

708.15 

708.41 

27.90 

708.66 

708.92 

709.17 

709.42 

709.68 

709.93 

710.19 

710.44 

710.69 

710.95 

28.00 

711.20 

711.46 

711.71 

711.96 

712.22 

712.47 

712.73 

712.98 

713.23 

7I3-49 

28.10 

7I3-74 

714.00 

714.25 

714.50 

714.76 

715.01 

715.27 

715.52 

715.77 

716.03 

28.20 

716.28 

716.54 

716.79 

717.04 

717.30 

717.55 

717.81 

718.06 

718.31 

718.57 

28.30 

718.82 

719-08 

719-33 

719-58 

719.84 

720.09 

720.35 

720.60 

720.85 

721.11 

28.40 

721.36 

721.62 

721.87 

722.12 

722.39 

722.63 

722.89 

723.14 

723.39 

723.65 

28.50 

723.90 

724.16 

724.41 

724.66 

724.92 

725.17 

725.43 

725.68 

725.93 

726.  19 

28.60 

726.44 

726.70 

726.95 

727.20 

727.46 

727.71 

727.97 

728.22 

728.47 

728.73 

28.70 

728.98 

729.24 

729.49 

729-74 

730.00 

730.25 

730.51 

730.76 

731.01 

731.27 

28.80 

73I-52 

73L78 

732.03 

732.28 

732-54 

732.79 

733-05 

733-30 

733-55 

733-81 

28.90 

734.06 

734-32 

734-57 

734.82 

735-oS 

735-33 

735-59 

735-84 

736.09 

736.35 

29.00 

736.60 

736.86 

737." 

737.36 

737-62 

737-87 

738.13 

738.38 

738.63 

738.89 

29.10 

739-14 

739-40 

739-65 

739.90 

740.16 

740.41 

740.67 

740.92 

741.17 

741-43 

29.20 

741.68 

741.94 

742.19 

742.44 

742.70 

742.95 

743-21 

743.46 

743-71 

743-97 

29.30 

744.22 

744.48 

744-73 

744.98 

745-24 

745-49 

745-75 

746.00 

746-25 

746.51 

29.40 

746.76 

747-02 

747-27 

747.52 

747-78 

748.03 

748.29 

748.54 

748.79 

749.05 

29.50 

749-30 

749-56 

749.81 

750.o6 

750.32 

750.57 

750.83 

751.08 

75L33 

75L59 

29.60 

751.84 

752.10 

752-35 

752.60 

752-86 

753." 

753.37 

753-62 

753.87 

754.13 

29.70 

754-38 

754.64 

754.89 

755-14 

755-40 

755.65 

755-91 

756.16 

756.41 

756.67 

29.80 

756.92 

757-18 

757-43 

757-68 

757-94 

758.19 

758.45 

758.70 

758.95 

759-21 

29.90 

759-46 

759-72 

759-97 

760.22 

760.48 

760.73 

760.99 

761.24 

761.49 

761.75 

30.00 

762.00 

762.26 

762.51 

762.76 

763.02 

763.27 

763.53 

763.78 

764.03 

764.29 

P         r         P  rt        Inch,     o.ooi      0.002      0.003      0.004      0.005      0.006      0.007      0.008      0.009 

1   S'      mm.      0.025      0.051      0.076      0.102      0.127      °«I52      0.178      0.203      0.229 

SMITHSONIAN  TABLES. 


185 


TABLE  64. 


INCHES    INTO    MILLIMETRES. 

i  inch  =  25.40005  mm. 


1 
Inches. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

30.00 

762.00 

762.26 

762.51 

762.76 

763.02 

763.27 

763.53 

763.78 

764.03 

764-29 

30.10 

764.54 

764.80 

765.05 

765.30 

765.56 

765.81 

766.07 

766.32 

766.57 

766.83 

30.20 

767.08 

767.34 

"767-59 

767.84 

768.10 

768.35 

768.61 

768.86 

769.11 

769.37 

30.30 

769.62 

769.88 

770.13 

770.38 

770.64 

770.89 

77LI5 

771.40 

77I-65 

771.91 

30.40 

772.16 

772.42 

772.67 

772.92 

773.18 

773-43 

773.69 

773-94 

774-19 

774-45 

30.50 

774.70 

774.96 

775.21 

775-46 

775.72 

775-97 

776.23 

776.48 

776.73 

776.99 

30.60 

777.24 

777.50 

777-75 

778.00 

778.26 

778.51 

778.77 

779.02 

779.27 

779-53 

30.70 

779.78 

780.04 

780.29 

780.54 

780.80 

781.05 

781.31 

781.56 

781.81 

782.07 

30.80 

782.32 

782.58 

782.83 

783.08 

783.34 

783.59 

783.85 

784.  10 

784.35 

784.61 

30.90 

784.86 

785.12 

785.37 

785.62 

785.88 

786.13 

786.39 

786.64 

786.89 

787.15 

31.00 

787.40 

787.66 

787.91 

788.16 

788.42 

788.67 

788.93 

789.18 

789.43 

789.69 

31-*0 

789.94 

790.20 

790.45 

790.70 

790.96 

791.21 

79M7 

791.72 

791.97 

792.23 

31.20 

792.48 

792.74 

792.99 

793.24 

793-50 

793-75 

794-01 

794.26 

794-51 

794-77 

31.3° 

795-02 

795.28 

795.53 

795.78 

796.04 

796.29 

796.55 

796.80 

797-05 

797.31 

31.40 

797.56 

797.82 

798.07 

798.32 

798.58 

798.83 

799-09 

799-34 

799-59 

799.85 

31.50 

800.10 

800.36 

800.61 

800.86 

801.12 

801.37 

801.63 

801.88 

802.13 

802.39 

31.60 

802.64 

802.90 

803.15 

803.40 

803.66 

803.91 

804.17 

804.42 

804.67 

804.93 

31.70 

805.18 

805.44 

805.69 

805.94 

806.20 

806.45 

806.71 

806.96 

807.21 

807.47 

31.80 

807.72 

807.98 

808.23 

808.48 

808.74 

808.99 

809.25 

809.50 

809.75 

Siojoi 

31.90 

810.26 

810.52 

810.77 

8II.02 

811.28 

8H.53 

811.79 

812.04 

812.29 

812.55 

32.00 

812.80 

Inch,     o.ooi       0.002      0.003      0.004      0.005      0.006      0.007      0.008      0.009 
mm.      0.025      0.051       0.076      0.102       0.127      0.152       0.178      0.203      0.229 

SMITHSONIAN  TABLES. 


186 


TABLE  65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


Milli- 
metres. 

0 

• 

2 

3 

4 

5 

6 

7 

8 

9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

0 

0.0000 

0.0394 

0.0787 

0.1181 

0.1575 

0.1968 

0.2362 

0.2756 

0.3150 

0.3543 

10 

0-3937 

0.4331 

0.4724 

0.5118 

0.5512 

0.5906 

0.6299 

0.6693 

0.7087 

0.7480 

20 

0.7874 

0.8268 

0.8661 

0.9055 

0.9449 

0.9842 

1.0236 

1.0630 

I.I024 

I.I4I7 

30 

1.1811 

1.2205 

1.2598 

1.2992 

1.3386 

1.3780 

I.4I73 

I.4567 

1.4961 

1-5354 

40 

1.5748 

1.6142 

1.6535 

1.6929 

1.7323 

I.77I6 

1.8110 

1.8504 

1.8898 

1.9291 

50 

1.9685 

2.0079 

2.0472 

2.0866 

2.1260 

2.1654 

2.2047 

2.2441 

2.2835 

2.3228 

60 

2.3622 

2.4016 

2.4409 

2.4803 

2.5197 

2.559° 

2.5984 

2.6378 

2.6772 

2.7165 

70 

2-7559 

2-7953 

2-8346 

2.8740 

2.9134 

2.9528 

2.9921 

3.03I5 

3.0709 

3.II02 

80 

3.1496 

3.1890 

3-2283 

3.2677 

3.307I 

3.3464 

3-3858 

3.4252 

34646 

3.5039 

90 

3-5433 

3.5828 

3.6220 

3-6614 

3.7008 

3.7402 

3-7795 

3.8189 

3.8583 

3.8976 

100 

3-9370 

3.9764 

4-0157 

4.0551 

4.0945 

4.1338 

4-1732 

4.2126 

4.2520- 

4.2913 

no 

4.3307 

4.3701 

4.4094 

4.4488 

4.4882 

4.5276 

4-5669 

4.6063 

4.6457 

4.6850 

120 

4.7244 

4.7638 

4.8031 

4-8425 

4.8819 

4.9212 

4.9606 

5.0000 

5-0394 

5.0787 

130 

5-ii8i 

5.1575 

5.1968 

5.2362 

5-2756 

5.3*50 

5-3543 

5-3937 

54331 

54724 

140 

5.5H8 

5.5512 

5.5905 

5.6299 

5.6693 

5.7086 

5.7480 

5.7874 

5.8268 

5.8661 

150 

5.9055 

5-9449 

5.9842 

6.0236 

6.0630 

6.1024 

6.1417 

6.1811 

6.2205 

6.2598 

160 

6.2992 

6.3386 

6.3779 

6.4173 

6.4567 

6.4960 

6-5354 

6.5748 

6.6142 

6.6535 

170 

6.6929 

6.7323 

6.7716 

6.8IIO 

6.8504 

6.8898 

6.9291 

6.9685 

7.0079 

7.0472 

180 

7.0866 

7.1260 

7.1653 

7.2047 

7.2441 

7-2834 

7.3228 

7.3622 

7.4016 

74409 

190 

7.4803 

7.5197 

7-5590 

7-5984 

7.6378 

7.6772 

7-7165 

7-7559 

7-7953 

7.8346 

200 

7.8740 

7.9J34 

7.9527 

7.9921 

8.0315 

8.0708 

8.IIO2 

8.1496 

8.1890 

8.2283 

210 

8.2677 

8.3071 

8.3464 

8.3858 

8.4252 

8.4646 

8.5039 

8-5433 

8.5827 

8.6220 

220 

8.6614 

8.7008 

8.7401 

8-7795 

8.8189 

8.8582 

8.8976 

8.9370 

8.9764 

9-0157 

230 

9-0551 

9.0945 

9.!338 

9.1732 

9.2126 

9.2520 

9.2913 

9.3307 

9.3701 

9.4094 

240 

9.4488 

9.4882 

9.5275 

9.5669 

9-6063 

9.6456 

9.6850 

9.7244 

9.7638 

9.8031 

250 

9.8425 

9.8819 

9.9212 

9.9606 

10.0000 

10.0394 

10.0787 

10.1181 

10.1575 

10.1968 

260 

10.2362 

10.2756 

10.3149 

10-3543 

10.3937 

10.4330 

10.4724 

10.5118 

10.5512 

10.5905 

270 

10.6299 

10.6693 

10.7086 

10.7480 

10.7874 

10.8268 

10.8661 

10.9055 

10.9449 

10.9842 

280 

11.0236 

11.0630 

11.1023 

II.I4I7 

11.1811 

11.2204 

11.2598 

11.2992 

II.3338 

11.3779 

290 

11.4173 

11.4568 

11.4960 

11-5354 

11.5748 

11.6142 

11.6535 

11.6929 

11.7323 

II.77I6 

300 

11.8110 

11.8504 

11.8897 

11.9291 

11.9685 

12.0078 

12.0472 

12.0866 

12.1260 

12.1653 

310 

12.2047 

12.2441 

12.2834 

12.3228 

12.3622 

12.4016 

12.4409 

12.4803 

12.5197 

12.5590 

320 

12.5984 

12.6378 

12.6771 

12.7165 

12.7559 

12.7952 

12.8346 

12.8740 

12.9134 

12.9527 

330 

12.9921 

13-0315 

13.0708 

13.1102 

13.1496 

13.1890 

13.2283 

13.2677 

13.3071 

13.3464 

340 

13.3858 

13.4252 

134645 

13.5039 

13.5433 

13.5826 

13.6220 

13.6614 

13.7008 

13.7401 

350 

13-7795 

13.8189 

13.8582 

13.8976 

13.9370 

13.9764 

14.0157 

14-0551 

14.0945 

14.1338 

360 

14.1732 

14.2126 

14.2519 

14.2913 

14.3307 

14.3700 

14.4094 

14.4488 

14.4882 

14.5275 

370 

14.5669 

14.6063 

14.6456 

14.6850 

14.7244 

14.7638 

14.8031 

14.8425 

14.8819 

14.9212 

380 

14.9606 

15.0000 

15-0393 

15.0787 

15.1181 

15.1574 

15.1968 

15.2362 

I5.2756 

I5.3I49 

390 

15-3543 

15-3937 

154330 

15.4724 

15.5118 

15-5512 

15.5905 

15.6299 

15.6693 

15.7086 

400 

15.7480 

15-7874 

15.8267 

15.8661 

15.9055 

15.9448 

15.9842 

16.0236 

16.0630 

16.1023 

Tenths  of  a  millimetre. 

Hundredths  of  a  millimetre. 

mm. 

Inch.             mm.             Inch. 

mm. 

Inch.            mm.              Inch. 

O.I 

0.0039              °-6              0.0236 

O.OI 

0.0004             0.06               0.0024 

.2 

.0079                .7                .0276 

.02 

.0008               .07                .0028 

•3 

.0118                .S                .0315 

.03 

.0012      -         .08                .0031 

•4 

.0157                -9                .0354 

.04 

.0016               .09                .0035 

•5 

.0197              i.o                .0394 

.05 

.0020               .10                .0039 

SMITHSONIAN  TABLES. 


TABLE    65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


Milli- 
metres. 

.0 

.. 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

400 

15.748 

15.752 

15.756 

15.760 

15.764 

15.768 

15.772 

I5.776 

15.779 

15.783 

401 

15.787 

I5.79I 

15-795 

15-799 

15.803 

15.807 

15.811 

15.815 

15.819 

15.823 

402 

15.827 

15.831 

15.835 

15.839 

15.842 

15.846 

15.850 

15.854 

15-858 

15.862 

403 

15.866 

15.870 

15.874 

15.878 

15.882 

15.886 

15.890 

15.894 

15.898 

15.902 

404 

15.905 

15.909 

15.913 

15.9*7 

15.921 

15.925 

15.929 

15-933 

15.937 

15.941 

405 

15-945 

15-949 

15.953 

15.957 

15.961 

15.965 

15.968 

15.972 

15.976 

15.980 

406 

15.984 

15.988 

15.992 

15-996 

16.000 

16.004 

16.008 

16.012 

16.016 

I6.O2O 

407 

16/024 

16.028 

16.031 

16.035 

16.039 

16.043 

16.047 

16.051 

16.055 

16.059 

408 

16.063 

16.067 

16.071 

16.075 

16.079 

16.083 

16.087 

16.091 

16.094 

16.098 

409 

16.  102 

16.106 

16.110 

16.114 

16.118 

16.122 

16.126 

16.130 

16.134 

16.138 

410 

16.142 

16.146 

16.150 

16.154 

16.157 

16.161 

16.165 

16.169 

16.173 

16.177 

411 

16.181 

16.185 

16.189 

16.193 

16.197 

16.201 

16.205 

16.209 

16.213 

16.217 

412 

16.220 

16.224 

16.228 

16.232 

16.236 

16.240 

16.244 

16.248 

16.252 

16.256 

413 

16.260 

16.264 

16.268 

16.272 

16.276 

16.279 

16.283 

16.287 

16.291 

16.295 

414 

16.299 

16.303 

16.307 

16.311 

16.315 

16.319 

16.323 

16.327 

16.331 

16.335 

415 

l6-339 

16.342 

16.346 

16.350 

16.354 

16.358 

16.362 

16.366 

16.370 

16.374 

416 

16.378 

16.382 

16.386 

16.390 

16.394 

16.398 

16.402 

16.405 

16.409 

16.413 

417 

16.417 

16.421 

16.425 

16.429 

16.433 

16.437 

16.441 

16.445 

16.449 

16.453 

418 

16.457 

16.461 

16.465 

16.468 

16.472 

16.476 

16.480 

16.484 

16.488 

16.492 

419 

16.496 

16.500 

16.504 

16.508 

16.512 

16.516 

16.520 

16.524 

16.528 

16.531 

420 

i6.535 

16.539 

16.543 

16.547 

16.551 

16.555 

16.559 

16.563 

16.567 

16.571 

421 

16.575 

l6-579 

.16.583 

16.587 

16.591 

16.594 

16.598 

16.602 

16.606 

16.610 

422 

16.614 

16.618 

16.622 

16.626 

16.630 

16.634 

16.638 

16.642 

16.646 

16.650  i 

423 

16.654 

16.657 

16.661 

16.665 

!6.669 

16.673 

16.677 

16.681 

16.685 

16.689 

424 

16.693 

16.697 

16.701 

16.705 

16.709 

16.713 

16.717 

16.720 

16.724 

16.728 

425 

16.732 

16.736 

16.740 

16.744 

16.748 

16.752 

16.756 

16.760 

16.764 

16.768 

426 

16.772 

16.776 

16.779 

16.783 

16.787 

16.791 

16.795 

16.799 

16.803 

16.807 

427 

16.811 

16.815 

16.819 

16.823 

16.827 

16.831 

16.835 

16.839 

16.842 

16.846 

428 

16.850 

16.854 

16.858 

16.862 

16.866 

16.870 

16.874 

16.878 

16.882 

16.886 

429 

16.890 

16.894 

16.898 

16.902 

16.905 

16.909 

16.913 

16.917 

16.921 

16.925 

430 

16.929 

16.933 

16.937 

16.941 

16.945 

16.949 

16.953 

16.957 

16.961 

16.965 

43i 

16.968 

16.972 

16.976 

16.980 

16.984 

16.988 

16.992 

16.996 

17.000 

17.004 

432 

17.008 

17.012 

17.016 

17.020 

17.024 

17.028 

17.031 

17-035 

17.039 

17.043 

433 

17.047 

17.051 

17.055 

17-059 

17.063 

17.067 

17.071 

17.075 

17.079 

17.083 

434 

17.087 

17.091 

17.094 

17.098 

17.102 

17.106 

17.110 

17.114 

17.118 

17.122 

435 

17.126 

17.130 

17.134 

17.138 

17.142 

17.146 

17.150 

I7-I54 

17.157 

17.161 

436 

17.165 

17.169 

I7.I73 

17.177 

17.181 

17.185 

17.189 

17.193 

17.197 

17.201 

437 

17.205 

17.209 

17.213 

17.217 

17.220 

17.224 

17.228 

17.232 

17.236 

17.240 

438 

17.244 

17.248 

17-252 

17-256 

17.260 

17.264 

17.268 

17.272 

17.276 

17.279 

439 

17-283 

17.287 

17.291 

17-295 

17.299 

17.303 

17.307 

17.311 

17-3*5 

17.319 

440 

17-323 

17.327 

I7.33I 

17.335 

17-339 

17.342 

17.346 

17.350 

17.354 

17.358 

441 

17.362 

17-366 

17.370 

17.374 

17.378 

17.382 

17.386 

17.390 

17.394 

17.398 

442 

17.402 

17.405 

17.409 

17.413 

17.417 

17.421 

17.425 

17.429 

17.433 

17-437 

443 

17.441 

17-445 

17.449 

17453 

17-457 

17.461 

17.465 

17.468 

17.472 

17.476 

444 

17.480 

17.484 

17.488 

17.492 

17.496 

17.500 

17.504 

17.508 

17.512 

17.516 

445 

17.520 

17-524 

17-528 

I7.53I 

17.535 

17-539 

17.543 

17.547 

17.551 

17.555 

446 

17.559 

17-563 

17.567 

I7.57I 

17.575 

17-579 

17.583 

17.587 

I7-591 

17-594 

447 

17.598 

17.602 

17.606 

17.610 

17.614 

17.618 

17.622 

17.626 

17.630 

17.634 

448 

17.638 

17.642 

17.646 

17.650 

17-654 

17.657 

17.661 

17.665 

17.669 

17.673 

449 

17.677 

17.681 

17.685 

17.689 

17.693 

17.697 

17.701 

17-705 

17.709 

17.713 

450 

17.717 

17.720 

17.724 

17.728 

17.732 

17.736 

17.740 

17.744 

17.748 

17.752 

SMITHSONIAN  TABLES. 


188 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


TABLE   65. 

**« 


Milli- 
metres. 

.0 

-. 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

450 

17.717 

17.720 

17.724 

17.728 

17.732 

17.736 

17.740 

17.744 

17.748 

17.752 

45i 

I7-756 

17.760 

17.764 

17.768 

17.772 

17.776 

17-779 

17.783 

17.787 

17.791 

452 

17-795 

17.799 

17.803 

17.807 

I7.8II 

17.815 

17.819 

17.823 

17-827 

17.831 

453 

I7-835 

17.839 

17.842 

17.846 

17.850 

17.854 

17.858 

17.862 

17.866 

17.870 

454 

17.874 

17.878 

17.882 

17.886 

17.890 

17.894 

17-898 

17.902 

17.905 

17.909 

455 

i7-9T3 

17.917 

17.921 

17.925 

17.929 

17.933 

17-937 

17.941 

17-945 

17.949 

456 

17-953 

17-957 

17.961 

17.965 

17.968 

17.972 

17.976 

17.980 

17.984 

17.988 

457 

17.992 

17.996 

18.000 

18.004 

18.008 

18.012 

18.016 

I8.O2O 

18.024 

18.028 

458 

18.031 

18.035 

18.039 

18.043 

18.047 

18.051 

18.055 

18.059 

18.063 

18.067 

459 

18.071 

18.075 

18.079 

18.083 

18.087 

18.091 

18.094 

18.098 

iS.  IO2 

18.106 

460 

18.110 

I8.II4 

18.118 

I8.I22 

18.126 

18.130 

18.134 

18.138 

I8.T42 

18.146 

461 

18.150 

18.154 

18.157 

18.161 

18.165 

18.169 

18.173 

18.177 

18.181 

18.185 

462 

18.189 

18.193 

18.197 

18.201 

18.205 

18.209 

18.213 

18.216 

18.220 

18.224 

463 

18.228 

18.232 

18.236 

18.240 

18.244 

18/248 

18.252 

18.256 

18.260 

18.264 

464 

18.268 

18.272 

18.276 

18.279 

18.283 

18.287 

18.291 

18.295 

18.299 

18.303 

465 

18.307 

18.311 

18.315 

18.319 

18.323 

18.327 

18.331 

18.335 

18-339 

18.342 

466 

18.346 

18.350 

18.354 

18.358 

18.362 

18.366 

18.370 

18.374 

18.378 

18.382 

467 

18.386 

18.390 

18.394 

18.398 

18.402 

18.405 

18.409 

18.413 

18.417 

18.421 

468 

18.425 

18.429 

18-433 

18.437 

18.441 

18.445 

18.449 

18.453 

18.457 

18.461 

469 

18.465 

18.468 

18.472 

18.476 

18.480 

18.484 

18.488 

18.492 

18.496 

18.500 

470 

18.504 

18.508 

18.512 

18.516 

18.520 

18.524 

18.528 

18.531 

18.535 

18.539 

471 

18.543 

18.547 

18.551 

18.555 

18.559 

18.563 

18.567 

18.571 

18.575 

18.579 

472 

18.583 

18.587 

18.591 

18.594 

18.598 

18.602 

18.606 

18.610 

18.614 

18.618 

473 

18.622 

18.626 

18.630 

18.634 

18.638 

18.642 

18.646 

18.650 

18.654 

18.657 

474 

18.661 

18.665 

18.669 

18.673 

18.677 

18.681 

18.685 

18.689 

18.693 

18.697 

475 

18.701 

18.705 

18.709 

18.713 

18.716 

18.720 

18.724 

18.728 

18.732 

18.736 

476 

18.740 

18.744 

18.748 

18.752 

18.756 

18.760 

18.764 

18.768 

18.772 

18.776 

477 

18.779 

18.783 

18.787 

18.791 

18.795 

18.799 

18.803 

18.807 

18.811 

18.815 

478 

18.819 

18.823 

18.827 

18.831 

18.835 

18.839 

18.842 

18.846 

18.850 

18.854 

479 

18.858 

18.862 

18.866 

18.870 

18.874 

18.878 

18.882 

18.886 

18.890 

18.894 

480 

18.898 

18.902 

18.905 

18.909 

18.913 

18.917 

18.921 

18.925 

18.929 

18.933 

481 

18.937 

18.941 

18.945 

18.949 

18.953 

18.957 

18.961 

18.965 

18.968 

18.972 

482 

18.976 

18.980 

18.984 

18.988 

18.992 

18.996 

19.000 

19.004 

19.008 

19.012 

483 

19.016 

19.020 

19.024 

19.028 

19.031 

I9-035 

19.039 

I9-043 

19.047 

19.051 

484 

I9-055 

I9-059 

19.063 

19.067 

19.071 

I9-075 

19.079 

19-083 

19.087 

19.091 

485 

19.094 

19.098 

19.102 

19.106 

19.110 

19.114 

19.118 

19.122 

19.126 

19.130 

486 

!9-T34 

19.138 

19.142 

19.146 

19.  150 

I9.J54 

I9-J57 

19.161 

19.165 

19.169 

487 

I9-I73 

19.177 

19.181 

19.185 

19.189 

19.193 

19.197 

19.201 

19-205 

19.209 

488 

19.213 

19.216 

19.220 

19.224 

19.228 

19.232 

19.236 

19.240 

19.244 

19.248 

489 

19.252 

I9.256 

19.260 

19.264 

19.268 

19.272 

19.276 

19.279 

19-283 

19.287 

490 

19.291 

I9-295 

19.299 

19-303 

19.307 

19.311 

I9.3!5 

19-319 

I9-323 

19.327 

49  1 

I9.33I 

19-335 

19-339 

19.342 

19.346 

I9-350 

19.354 

I9.358 

19.362 

19.366 

492 

19.370 

19-374 

19.378 

19-382 

19.386 

19.390 

19-394 

I9-398 

19.402 

19-405 

493 

19.409 

19.413 

19.417 

19.421 

I9-425 

19.429 

19433 

19-437 

19.441 

19-445 

494 

19.449 

19.453 

19-457 

19.461 

19.465 

19.468 

19.472 

19.476 

19.480 

19.484 

495 

19.488 

19.492 

19.496 

19.500 

19.504 

19.508 

19.512 

19.516 

19.520 

19-524 

496 

19.528 

I9.53I 

19-535 

19-539 

19.543 

I9.547 

I9.55I 

19-555 

19-559 

19-563 

497 

19-567 

I9.57I 

19-575 

19-579 

I9.583 

19-587 

I9-591 

19-594 

I9-598 

19.602 

498 

19.606 

19.610 

19.614 

19.618 

19.622 

19.626 

19.630 

19.634 

19.638 

19.642 

499 

19.646 

19.650 

19.654 

I9-657 

19.661 

19-665 

19.669 

19.673 

19.677 

19.681 

500 

19-685 

19.689 

19-693 

19.697 

19.701 

19-705 

19.709 

I9-7I3 

19.716 

19.720 

SMITHSONIAN  TABLES. 


189 


TABLE  65 


MILLIMETRES    INTO    INCHES. 

i  mm.  —  0.03937  inch. 


Milli- 
metres. 

.0 

.. 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

500 

19-685 

19.689 

19.693 

19.697 

19.701 

19.705 

19.709 

I9-7I3 

19.716 

19.720 

5oi 

19.724 

19.728 

I0\732 

19.736 

19.740 

19.744 

19.748 

I9-752 

I9-756 

19.760 

502 

19.764 

19.768 

19.772 

19.776 

19.779 

I9.783 

19.787 

19.791 

J9-795 

19.799 

503 

19.803 

19.807 

19.811 

19.815 

19.819 

19.823 

19.827 

19.831 

19-835 

19.839 

504 

19.842 

19.846 

19.850 

I9.854 

19.858 

19.862 

19.866 

19.870 

19.874 

19.878 

505 

19.882 

19.886 

19.890 

19.894 

19.898 

19.902 

I9-905 

19.909 

I9-9I3 

19.917 

506 

19.921 

19.925 

19.929 

19-933 

19-937 

19.941 

19-945 

19.949 

J9-953 

19-957 

507 

19.961 

19.965 

19.968 

19.972 

19.976 

19.980 

19.984 

19.988 

19.992 

19.996 

508 

20.000 

20.004 

20.008 

20.012 

20.016 

2O.O2O 

20.024 

20.028 

20.031 

20.035 

509 

20.039 

20.043 

20.047 

20.051 

20.055 

20.059 

20.063 

20.067 

20.071 

20.075 

510 

2O.O79 

20.083 

20.087 

2O.O9I 

20.094 

20.098 

2O.  IO2 

20.  106 

20.110 

20.114 

5ii 

20.118 

20.122 

2O.I26 

20.130 

20.134 

20.138 

20.  142 

20.  146 

20.150 

20.154 

512 

20.157 

20.161 

20.  165 

20.169 

20.173 

20.177 

20.181 

20.185 

20.189 

20.  193 

513 

20.197 

2O.2OI 

20.205 

20.  2O9 

20.213 

20.2l6 

2O.22O 

20.224 

20.228 

20.232 

5H 

20.  236 

2O.24O 

20.244 

20.  248 

20.252 

20.256 

20.  260 

20.  264 

20.268 

20.272 

515 

20.276 

20.279 

20.283 

20.287 

20.291 

20.295 

20.299 

20.303 

20.307 

2O.3II 

5i6 

20.315 

20.319 

20.323 

20.327 

20.331 

20.335 

20.339 

20.342 

20.346 

20.350 

517 

20.354 

20.358 

20.362 

20.366 

20.370 

20.374 

20.378 

20.382 

20.386 

20.390 

5i8 

20.394 

20.398 

2O.4O2 

20.405 

20.409 

20.413 

20.417 

20.421 

20.425 

20.429 

519 

20.433 

20.437 

2O.44I 

20.445 

20.449 

20.453 

20.457 

20.461 

20.465 

20.468 

520 

20.472 

20.476 

20.480 

20.484 

20.488 

20.492 

20.496 

20.500 

20.504 

20.508 

521 

20.512 

20.516 

20.520 

20.524 

20.528 

20.531 

20.535 

20.539 

20.543 

20.547 

522 

20.551 

20.555 

20.559 

20.563 

20.567 

20.571 

20.575 

20.579 

20.583 

20.587 

523 

20.591 

20.594 

20.598 

20.602 

20.606 

20.610 

2O.6T4 

20.618 

20.622 

20.626 

524 

20.630 

20.634 

20.638 

2O.642 

20.646 

20.  650 

20.654 

20.657 

20.661 

20.665 

525 

20.669 

20.673 

20.677 

20.681 

20.685 

20.689 

20.693 

20.697 

20.701 

20.705 

526 

20.709 

20.713 

20.716 

20.720 

20.724 

20.728 

20.732 

20.736 

20.740 

20.744 

527 

20.748 

20.752 

20.756 

20.760 

20.764 

20.768 

20.772 

20.776 

20.779 

20.783 

528 

20.787 

2O.79I 

20.795 

20.799 

20.803 

20.807 

20.8II 

20.815 

20.819 

20.823 

529 

20.827 

20.831 

20.835 

20.839 

20.842 

20.846 

20.850 

20.854 

20.858 

20.862 

530 

20.866 

2O.87O 

20.874 

20.878 

20.882 

20.886 

20.890 

20.894 

20.898 

2O.9O2 

53i 

20.905 

20.909 

20.913 

20.917 

20.921 

20.925 

20.929 

20.933 

20.937 

2O.94I 

532 

20.945 

20.949 

20.953 

20.957 

20.961 

20.965 

20.968 

20.972 

20.976 

20.980 

533 

20.984 

20.988 

20.992 

20.996 

21.000 

21.004 

2I.008 

21.012 

2I.OI6 

21.020 

534 

21.024 

2I.O28 

21.031 

21.035 

21.039 

21.043 

21.047 

21.051 

21-055 

21.059 

535 

21.063 

21.067 

21.071 

21.075 

21.079 

21.083 

21.087 

21.091 

21.094 

21.098 

536 

21.102 

2I.I06 

21.  IIO 

21.114 

2I.II8 

21.122 

21.126 

21.130 

21.134 

21.138 

537 

21.142 

21.146 

21.150 

21.154 

21.157 

21.161 

2I.I65 

2I.I69 

21.173 

21.177 

538 

21.181 

21.185 

2I.I89 

21-193 

21.197 

21.201 

21.205 

21.209 

21.213 

2I.2I6 

539 

2I.22O 

21.224 

21.228 

21.232 

21.236 

21.240 

21.244 

21.248 

21.252 

21.256 

540 

21.260 

21.264 

21.268 

21.272 

21.276 

21.279 

21.283 

21.287 

21.291 

21-295 

541 

21.299 

21.303 

21.307 

21.311 

21.315 

21.319 

21.323 

21.327 

21.331 

21-335 

542 

21-339 

21.342 

21.346 

21.350 

21-354 

21.358 

21.362 

21.366 

21.370 

21-374 

543 

21.378 

21.382 

21.386 

21.390 

21-394 

21.398 

21.402 

21.405 

21.409 

21.413 

544 

21.417 

21.421 

21.425 

21.429 

21-433 

21-437 

21.441 

21.445 

21.449 

21-453 

545 

21-457 

2I.46I 

21.465 

21.468 

21.472 

21.476 

21.480 

21.484 

21.488 

21.492 

546 

21.496 

21.500 

21.504 

21.508 

21.512 

21.516 

21.520 

21.524 

21.528 

21-531 

547 

21-535 

2L539 

21-543 

21-547 

21-551 

21.555 

21-559 

21.563 

21.567 

21.571 

548 

21.575 

21-579 

2L583 

21.587 

21.591 

21-594 

21.598 

21.602 

21.606 

21.610 

549 

21.614 

21.618 

21.622 

21.626 

21.630 

21.634 

21.638 

21.642 

21.646 

21.650 

550 

21.654 

21.657 

2I.66I 

21.665 

21.669 

21.673 

21.677 

2I.68I 

21.685 

21.689 

SMITHSONIAN  TABLES. 


IQO 


TABLE   65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


Mil!!- 
metres. 

.0 

.. 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

550 

21.654 

21.657 

2I.66I 

21.665 

21.669 

21.673 

21.677 

2I.68I 

21.685 

21.689 

55i 

21.693 

21.697 

21.701 

21.705 

21.709 

21.713 

21.716 

21.720 

21.724 

21.728 

552 

21.732 

21.736 

21.740 

21.744 

21.748 

21.752 

21.756 

21.760 

21.764 

21.768 

553 

21.772 

21.776 

21.779 

21.783 

21.787 

21.791 

21-795 

21.799 

21.803 

21.807 

554 

2I.8II 

2I.8I5 

21.819 

21.823 

21.827 

21.831 

21.835 

21.839 

21.842 

21.846 

555 

21.850 

21.854 

21.858 

21.862 

21.866 

21.870 

21.874 

21.878 

21.882 

21.  886 

556 

21.890 

21.894 

21.898 

21.902 

21.905 

21.909 

21.913 

21.917 

21.921 

21.925 

557 

21.929 

21-933 

21.937 

21.941 

21-945 

21.949 

2L953 

21-957 

21.961 

21.965 

558 

21.968 

21.972 

21.976 

21.980 

21.984 

21.988 

21.992 

21.996 

22.000 

22.004 

559 

22.OO8 

22.OI2 

22.OI6 

22.020 

22.024 

22.028 

22.031 

22.035 

22.039 

22.043 

560 

22.047 

22.051 

22.055 

22.059 

22.063 

22.067 

22.071 

22.075 

22.079 

22.083 

56i 

22.087 

22.O9I 

22.094 

22.098 

22.102 

22.106 

22.  IIO 

22.114 

22.1l8 

22.122 

562 

22.126 

22.I3O 

22.134 

22.138 

22.142 

22.146 

22.150 

22.153 

22.157 

22.l6l 

563 

22.165 

22.169 

22.173 

22.177 

22.I8I 

22.185 

22.189 

22.193 

22.197 

22.2OI 

564 

22.205 

22.2O9 

22.213 

22.2l6 

22.220 

22.224 

22.228 

22.232 

22.236 

22.240 

565 

22.244 

22.248 

22.252 

22.256 

22.260 

22.264 

22.268 

22.272 

22.276 

22.279 

566 

22.283 

22.287 

22.291 

22.295 

22.299 

22.303 

22.307 

22.311 

22.315 

22.319 

567 

22.323 

22.327 

22.331 

22.335 

22.339 

22.342 

22.346 

22.350 

22.354 

22.358 

568 

22.362 

22.366 

22.370 

22.374 

22.378 

22.382 

22.386 

22.390 

22.394 

22.398 

569 

22.402 

22.405 

22.409 

22.413 

22.417 

22.421 

22.425 

22.429 

22.433 

22.437 

570 

22.441 

22-445 

22.449 

22.453 

22.457 

22.461 

22.465 

22.468 

22.472 

22.476 

57i 

22.480 

22.484 

22.488 

22.492 

22.496 

22.500 

22.504 

22.508 

22.512 

22.516 

572 

22.520 

22.524 

22.528 

22.531 

22.535 

22.539 

22-543 

22.547 

22.551 

22-555 

573 

22.559 

22.563 

22.567 

22.571 

22.575 

22.579 

22.583 

22.587 

22.591 

22.594 

574 

22.598 

22.6O2 

22.6o6 

22.610 

22.614 

22.618 

22.622 

22.626 

22.630 

22.634 

575 

22.638 

22.642 

22.646 

22.650 

22.653 

22.657 

22.661 

22.665 

22.669 

22.673 

576 

22.677 

22.681 

22.685 

22.689 

22.693 

22.697 

22.7OI 

22.705 

22.709 

22.713 

577 

22.716 

22.720 

22.724 

22.728 

22.732 

22.736 

22.74O 

22.744 

22.748 

22.752 

578 

22.756 

22.760 

22.764 

22.768 

22.772 

22.776 

22.779 

22.783 

22.787 

22.791 

579 

22.795 

22.799 

22.803 

22.8O7 

22.8II 

22.815 

22.819 

22.823 

22.827 

22.831 

580 

22.835 

22.839 

22.842 

22.846 

22.850 

22.854 

22.858 

22.862 

22.866 

22.870 

58i 

22.874 

22.878 

22.882 

22.886 

22.890 

22.894 

22.898 

22.902 

22.905 

22.909 

582 

22.913 

22.917 

22.921 

22.925 

22.929 

22.933 

22.937 

22.941 

22.945 

22.949 

583 

22.953 

22.957 

22.961 

22.965 

22.968 

22.972 

22.976 

22.980 

22.984 

22.988 

584 

22.992 

22.996 

23.000 

23.004 

23.008 

23.012 

23.016 

23.020 

23.024 

23.028 

585 

23.031 

23.035 

23.039 

23-043 

23.047 

23-051 

23.055 

23.059 

23.063 

23.067 

586 

23.071 

23.075 

23.079 

23.083 

23.087 

23.091 

23.094 

23.098 

23.102 

23.106 

587 

23.110 

23.114 

23.118 

23.122 

23.126 

23.130 

23.134 

23-138 

23.142 

23.146 

588 

23.150 

23.153 

23.157 

23.161 

23.165 

23.169 

23.I73 

23.177 

23.181 

23.185 

589 

23.189 

23.!93 

23.197 

23.201 

23.205 

23.209 

23.213 

23.216 

23.220 

23.224 

590 

23.228 

23.232 

23.236 

23.240 

23.244 

23.248 

23.252 

23.256 

23.260 

23.264 

591 

23.268 

23.272 

23.276 

23.279 

23.283 

23.287 

23.291 

23.295 

23.299 

23.303 

592 

23.307 

23.311 

23.315 

23-319 

23.323 

23.327 

23.33I 

23-335 

23.339 

23.342 

593 

23.346 

23.350 

23-354 

23.358 

23.362 

23.366 

23.370 

23.374 

23.378 

23.382 

594 

23.386 

23.390 

23.394 

23.398 

23.402 

23405 

23.409 

23413 

23.417 

23.421 

595 

23.425 

23.429 

23-433 

23.437 

23.441 

23445 

23-449 

23.453 

23.457 

23.461 

596 

23-465 

23.468 

23.472 

23.476 

23.480 

23.484 

23.488 

23-492 

23-496 

23.500 

597 

23.504 

23-508 

23.512 

23-516 

23.520 

23.524 

23.528 

23.531 

23.535 

23.539 

598 

23-543 

23.547 

23.55I 

23.555 

23-559 

23.563 

23.567 

23-571 

23.575 

23-579 

599 

23.583 

23-587 

23.59I 

23.594 

23.598 

23.602 

23.606 

23.610 

23.614 

23.618 

600 

23.622 

23.626 

23.630 

23.634 

23-638 

23.642 

23.646 

23.650 

23-653 

23.657 

SMITHSONIAN  TABLES. 


TABLE   65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


Milli- 
metres. 

.0 

.. 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

[nches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

600 

23.622 

23.626 

23.630 

23.634 

23-638 

23-642 

23.646 

23.650 

23.653 

23.657 

601 

23.661 

23-665 

23.669 

23.673 

23.677. 

23.681 

23-685 

23.689 

23.693 

23.697 

602 

23.701 

23.705 

23.709 

23.713 

23.716 

23.720 

23.724 

23.728 

23.732 

23.736 

603 

23.740 

23-744 

23.748 

23.752 

23.756 

23.760 

23.764 

23.768 

23.772 

23.776 

604 

23.779 

23.783 

23.787 

23.791 

23.795 

23.799 

23.803 

23.807 

23.8II 

23.815 

605 

23.819 

23.823 

23.827 

23.831 

23.835 

23.839 

23.842 

23.846 

23.850 

23.854 

606 

23.858 

23.862 

23.866 

23.870 

23.874 

23.8/8 

23.882 

23.886 

23.890 

23.894 

607 

23.898 

23.902 

23.905 

23.909 

23-9J3 

23.917 

23.921 

23.925 

23.929 

23.933 

608 

23-937 

23.941 

23-945 

23.949 

23.953 

23-957 

23.961 

23-965 

23.968 

23.972 

609 

23.976 

23.980 

23.984 

23.988 

23.992 

23.996 

24.000 

24.004 

24.008 

24.012 

610 

24.016 

24.020 

24.024 

24.028 

24.031 

24.035 

24.039 

24.043 

24.047 

24.051 

611 

24.055 

24.059 

24.063 

24.067 

24.071 

24.075 

24.079 

24.083 

24.087 

24.091 

612 

24.094 

24.098 

24.102 

24.106 

24.110 

24.114 

24.118 

24.122 

24.126 

24.130 

613 

24.134 

24.138 

24.142 

24.146 

24.150 

24.153 

24.157 

24.161 

24.165 

24.169 

614 

24.173 

24.177 

24.181 

24.185 

24.189 

24.193 

24.197 

24.201 

24.205 

24.  209 

615 

24.213 

24.216 

24.220 

24.224 

24.228 

24.232 

24.236 

24.240 

24.244 

24.248 

616 

24.252 

24.256 

24.260 

24.264 

24.268 

24.272 

24.276 

24.279 

24.283 

24.287 

617 

24.291 

24.295 

24.299 

24.303 

24.307 

24.311 

24-  31  5 

24.319 

24.323 

24.327 

618 

24.33I 

24-335 

24.339 

24.342 

24.346 

24.350 

24-354 

24.358 

24.362 

24.366 

619 

24.370 

24-374 

24.378 

24.382 

24.386 

24.390 

24.394 

24.398 

24.402 

24.405 

620 

24.409 

24.413 

24.417 

24.421 

24.425 

24.429 

24.433 

24.437 

24.441 

24.445 

621 

24.449 

24.453 

24-457 

24.461 

24.465 

24.468 

24-472 

24.4/6 

24.480 

24.484 

622 

24.488 

24.492 

24.496 

24.500 

24.504 

24.508 

24.512 

24.516 

24.520 

24.524 

623 

24.528 

24.531 

24-535 

24-539 

24-543 

24-547 

24-551 

24-555 

24-559 

24.563 

624 

24.567 

24.571 

24.575 

24-579 

24-583 

24.587 

24-591 

24-594 

24.598 

24.602 

625 

24.606 

24.610 

24.614 

24.618 

24.622 

24.626 

24.630 

24.634 

24-638 

24.642 

626 

24.646 

24.650 

24.653 

24.657 

24.661 

24.665 

24.669 

24.6/3 

24.677 

24.681 

627 

24.685 

24.689 

24.693 

24.697 

24.701 

24.705 

24.709 

24.713 

24.716 

24.720 

628 

24.724 

24.728 

24.732 

24.736 

24.740 

24.744 

24.748 

24.752 

24.756 

24.760 

629 

24.764 

24.768 

24.772 

24.776 

24.779 

24.783 

24.787 

24.791 

24-795 

24.799 

630 

24.803 

24.807 

24.811 

24.815 

24.819 

24.823 

24.827 

24.831 

24.835 

24.839 

631 

24.842 

24.846 

24.850 

24.854 

24.858 

24.862 

24.866 

24.870 

24.874 

24.878 

632 

24.882 

24.886 

24.890 

24.894 

24.898 

24.902 

24-905 

24.909 

24-9J3 

24.917 

633 

24.921 

24.925 

24.929 

24.933 

24.937 

24.941 

24.945 

24.949 

24-953 

24.957 

634 

24.961 

24.965 

24.968 

24.972 

24.976 

24.980 

24.984 

24.988 

24.992 

24.996 

635 

25.000 

25.004 

25.008 

25.012 

25.016 

25.020 

25.024 

25.028 

25.031 

25.035 

636 

25.039 

25.043 

25.047 

25.051 

25-055 

25.059 

25-063 

25.067  25.071 

25.075 

637 

25.079 

25.083 

25-087 

25.091 

25-094 

25.098 

25.102 

25.106 

25.110 

25.114 

638 

25.118 

25.122 

25.126 

25.130 

25.134 

25.138 

25-142 

25.146 

25-150 

25.153 

639 

25.157 

25.161 

25.165 

25.169 

25.173 

25-I77 

25.181 

25-185 

25.189 

25.I93 

640 

25.I97 

25.201 

25.205 

25.209 

25-213 

25.216 

25.220 

25.224 

25.228 

25.232 

641 

25.236 

25.240 

25.244 

25.248 

25-252 

25.256 

25.260 

25.264 

25.268 

25.272 

642 

25.276 

25.279 

25-283 

25.287 

25.291 

25.295 

25-299 

25.303 

25-307 

25.3II 

643 

25.315 

25.319 

25.323 

25.327 

25-33I 

25.335 

25.339 

25.342 

25.346 

25.350 

644 

25-354 

25.358 

25.362 

25.366 

25.370 

25.374 

25.378 

25.382 

25.386 

25.390 

645 

25.394 

25.398 

25.402 

25405 

25.409 

25.413 

25.417 

25.421 

25.425 

25429 

646 

25.433 

25-437 

25.441 

25-445 

25-449 

25-453 

25-457 

25.461 

25-465 

25.468 

647 

25.472 

25.476 

25.480 

25.484 

25-488 

25492 

25.496 

25.500 

25-504 

25.508 

648 

25.512 

25.516 

25.520 

25.524 

25.528 

25.531 

25.535 

25-539 

25.543 

25-547 

649 

25.551 

25-555 

25-559 

25.563 

25-567 

25.57I 

25-575 

25-579 

25-583 

25-587 

650 

25-591 

25.594 

25.598 

25.602 

25.606 

25.610 

25.614 

25.618 

25.622 

25.626 

SMITHSONIAN  TABLES. 


IQ2 


TABLE  65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch* 


Milli- 
metres. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

650 

25-591 

25-594 

25.598 

25.602 

25.606 

25.610 

25.614 

25.618 

25.622 

25.626 

651 

25.630 

25.634 

25-638 

25.642 

25.646 

25.650 

25.653 

25.657 

25.661 

25.665 

652 

25.669 

25.673 

25.677 

25.681 

25-685 

25.689 

25.693 

25.697 

25.701 

25.705 

653 

25.709 

25.713 

25-716 

25.720 

25.724 

25.728 

25.732 

25.736 

25.740 

25.744 

654 

25.748 

25.752 

25.756 

25.760 

25.764 

25.768 

25.772 

25.776 

25-779 

25.783 

655 

25.787 

25.791 

25-795 

25.799 

25.803 

25.807 

25.811 

25.815 

25.819 

25.823 

656 

25.827 

25.831 

25.835 

25.839 

25.842 

25.846 

25-850 

25.854 

25.858 

25.862 

657 

25.866 

25.870 

25.874 

25.878 

25.882 

25.886 

25.890 

25.894 

25.898 

25.902 

658 

25-905 

25.909 

25.913 

25.9!7 

25.921 

25.925 

25.929 

25.933 

25.937 

25.94I 

659 

25-945 

25-949 

25.953 

25.957 

25.961 

25.965 

25.968 

25.972 

25.976 

25-980 

660 

25.984 

25.988 

25.992 

25.996 

26.000 

26.004 

26.008 

26.012 

26.016 

26.O2O 

661 

26.024 

26.028 

26.031 

26.035 

26.039 

26.043 

26.047 

26.051 

26.055 

26.059 

662 

26.063 

26.067 

26.071 

26.075 

26.079 

26.083 

26.087 

26.090 

26.094 

26.098 

663 

26.IO2 

26.  106 

26.IIO 

26.114 

26.118 

26.122 

26.126 

26.130 

26.134 

26.138 

664 

26.142 

26.  146 

26.150 

26.153 

26.157 

26.161 

26.165 

26.169 

26.173 

26.177 

665 

26.181 

26.185 

26.189 

26.193 

26.197 

26.2OI 

26.205 

26.209 

26.213 

26.216 

666 

26.220 

26.224 

26.228 

26.232 

26.236 

26.240 

26.244 

26.248 

26.252 

26.256 

667 

26.260 

26.264 

26.268 

26.272 

26.276 

26.279 

26.283 

26.287 

26.291 

26.295 

668 

26.299 

26.303 

26.307 

26.311 

26.315 

26.319 

26.323 

26.327 

26.331 

26.335 

669 

26.339 

26.342 

26.346 

26.350 

26.354 

26.358 

26.362 

26.366 

26.370 

26.374 

670 

26.378 

26.382 

26.386 

26.390 

26.394 

26.398 

26.402 

26.405 

26.409 

26.413 

671 

26.417 

26.421 

26.425 

26.429 

26.433 

26.437 

26.441 

26.445 

26.449 

26.453 

672 

26.457 

26.461 

26.465 

26.468 

26.472 

26.476 

26.480 

26.484 

26.488 

26.492 

673 

26.496 

26.500 

26.504 

26.508 

26.512 

26.516 

26.520 

26.524 

26.528 

26.531 

674 

26-535 

26.539 

26.543 

26.547 

26.551 

26.555 

26-559 

26.563 

26.567 

26.571 

675 

26.575 

26.579 

26.583 

26.587 

26.590 

26.594 

26.598 

26.602 

26.606 

26.610 

676 

26.614 

26.618 

26.622 

26.626 

26.630 

26.634 

26.638 

26.642 

26.646 

26.650 

677 

26.653 

26.657 

26.661 

26.665 

26.669 

26.673 

26.677 

26.681 

26.685 

26.689 

678 

26.693 

26.697 

26.701 

26.705 

26.709 

26.713 

26.716 

26.720 

26.724 

26.728 

679 

26.732 

26.736 

26.740 

26.744 

26.748 

26.752 

26.756 

26.760 

26.764 

26.768 

680 

26.772 

26.776 

26.779 

26.783 

26.787 

26.791 

26.795 

26.799 

26.803 

26.807 

68  1 

26.8II 

26.815 

26.819 

26.823 

26.827 

26.831 

26.835 

26.838 

26.842 

26.846 

682 

26.850 

26.854 

26.858 

26.862 

26.866 

26.870 

26.874 

26.878 

26.882 

26.886 

683 

26.890 

26.894 

26.898 

26.902 

26.905 

26.909 

26.913 

26.917 

26.921 

26.925 

684 

26.929 

26.933 

26.937 

26.941 

26.945 

26.949 

26.953 

26.957 

26.961 

26.965 

685 

26.968 

26.972 

26.976 

26.980 

26.984 

26.988 

26.992 

26.996 

27.000 

27.004 

686 

27.008 

27.012 

27.016 

27.020 

27.024 

27.028 

27.031 

27.035 

27.039 

27.043 

687 

27.047 

27.051 

27.055 

27.059 

27.063 

27.067 

27.071 

27.075 

27.079 

27.083 

688 

27.087 

27.090 

27.094 

27.098 

27.102 

27.106 

27.110 

27.114 

27.118 

27.122 

689 

27.126 

27.130 

27.134 

27.138 

27.142 

27.146 

27.150 

27.153 

27.157 

27.161 

690 

27.165 

27.169 

27.173 

27.177 

27.181 

27.185 

27.l89 

27.193 

27.197 

27.20! 

691 

27.205 

27.209 

27.213 

27.216 

27.220 

27.224 

27.228 

27.232 

27.236 

27.240 

692 

27.244 

27.248 

27.252 

27.256 

27.260 

27.264 

27.268 

27.272 

27.276 

27.279 

693 

27.283 

27.287 

27.291 

27.295 

27.299 

27.303 

27.307 

27.311 

27.315 

27.319 

694 

27.323 

27.327 

27-331 

27.335 

27.339 

27.342 

27.346 

27.350 

27-354 

27.358 

695 

27.362 

27.366 

27.370 

27.374 

27.378 

27.382 

27.386 

27.390 

27-394 

27.398 

696 

27.402 

27.405 

27.409 

27.413 

27.417 

27.421 

27.425 

27.429 

27.433 

27437 

697 

27.441 

27.445 

27-449 

27.453 

27.457 

27.461 

27.465 

27.468 

27472 

27.476 

698 

27.480 

27.484 

27.488 

27.492 

27.496 

27.500 

27.504 

27.508 

27.512 

27.516 

699 

27.520 

27-524 

27.528 

27.531 

27-535 

27.539 

27-543 

27.547 

27.551 

27-555 

700 

27-559 

27-563 

27.567 

27.571 

27.575 

27.579 

27.583 

27.587 

27.590 

27.594 

SMITHSONIAN  TABLES. 


193 


TABLE   65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


Milli- 
metres. 

.0 

.' 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

700 

27-559 

27.563 

27.567 

27.571 

27.575 

27.579 

27.583 

27.587 

27.590 

27-594 

701 

27-598 

27.602 

27.606 

27.610 

27.614 

27.618 

27.622 

27.626 

27.630 

27.634 

702 

27.638 

27.642 

27.646 

27.650 

27.653 

27.657 

27.661 

27-665 

27.669 

s- 

27.673 

703 

27.677 

27.681 

27-685 

27.689 

27-693 

27.697 

27.701 

27.705 

27.709 

27.713 

704 

27.716 

27.720 

27.724 

27.728 

27.732 

27.736 

27.740 

27-744 

27.748 

27.752 

705 

27.756 

27.760 

27.764 

27.768 

27.772 

27.776 

27.779 

27.783 

27.787 

27.791 

706 

27-795 

27.799 

27.803 

27.807 

27.811 

27.815 

27.819 

27-823 

27.827 

27.831 

707 

27.835 

27.839 

27.842 

27.846 

27.850 

27.854 

27.858 

27.862 

27.866 

27.870 

708 

27.8.74 

27.878 

27.882 

27.886 

27.890 

27.894 

27.898 

27.902 

27.905 

27.909 

709 

27.913 

27.917 

27.921 

27.925 

27.929 

27-933 

27.937 

27.941 

27-945 

27.949 

710 

27.953 

27.957 

27.961 

27.965 

27.968 

27.972 

27.976 

27.980 

27.984 

27.988 

711 

27.992 

27.996 

28.000 

28.004 

28.008 

28.012 

28.016 

28.020 

28.024 

28.028 

712 

28.031 

28.035 

28.039 

28.043 

28.047 

28.051 

28.055 

28.059 

28.063 

28.067 

713 

28.071 

28.075 

28.079 

28.083 

28.087 

28.090 

28.094 

28.098 

28.IO2 

28.106 

714 

28.110 

28.114 

28.118 

28.122 

28.126 

28.130 

28.134 

28.138 

28.142 

28.146 

715 

28.150 

28.153 

28.157 

28.l6l 

28.165 

28.169 

28.173 

28.177 

28.I8I 

28.185 

716 

28.189 

28.193 

28.197 

28.2OI 

28.205 

28.209 

28.213 

28.216 

28.220 

28.224 

717 

28.228 

28.232 

28.236 

28.  240 

28.244 

28.248 

28.252 

28.256 

28.260 

28.264 

718 

28.268 

28.272 

28.276 

28.279 

28.283 

28.287 

28.291 

28.295 

28.299 

28.303 

719 

28.307 

28.311 

28.315 

28.319 

28.323 

28.327 

28.331 

28.335 

28.339 

28.342 

720 

28.346 

28.350 

28.354 

28.358 

28.362 

28.366 

28.370 

28.374 

28.378 

28.382 

721 

28.386 

28.390 

28.394 

28.398 

28.402 

28.405 

28.409 

28.413 

28.417 

28.421 

722 

28.425 

28.429 

28.433 

28.437 

28.441 

28.445 

28.449 

28.453 

28.457 

28.461 

723 

28.465 

28.468 

28.472 

28.476 

28.480 

28.484 

28.488 

28.492 

28.496 

28.500 

724 

28.504 

28.508 

28.512 

28.516 

28.520 

28.524 

28.528 

28.531 

28.535 

28.539 

725 

28.543 

28.547 

28.551 

28.555 

28-559 

28.563 

28.567 

28.571 

28.575 

28.579 

726 

28.583 

28.587 

28.590 

28.594 

28.598 

28.602 

28.606 

28.610 

28.614 

2S.6l8 

727 

28.622 

28.626 

28.630 

28.634 

28.638 

28.642 

28.646 

28.650 

28.653 

28.657 

728 

28.661 

28.665 

28.669 

28.673 

28.677 

28.681 

28.685 

28.689 

28.693 

28.697 

729 

28.701 

28.705 

28.709 

28.713 

28.716 

28.720 

28.724 

28.728 

28.732 

28.736 

730 

28.740 

28.744 

28.748 

28.752 

28.756 

28.760 

28.764 

28.768 

28.772 

28.776 

73i 

28.779 

28.783 

28.787 

28.791 

28.795 

28.799 

28.803 

28.807 

28.8II 

28.815 

732 

28.819 

28.823 

28.827 

28.831 

28.835 

28.839 

28.842 

28.846 

28.850 

28.854 

733 

28.858 

28.862 

28.866 

28.870 

28.874 

28.878 

28.882 

28.886 

28.890 

28.894 

734 

28.898 

28.902 

28.905 

28.909 

28.913 

28.9!7 

28.921 

28.925 

28.929 

28.933 

735 

28.937 

28.941 

28.945 

28.949 

28.953 

28.957 

28.961 

28.965 

28.968 

28.972 

736 

28.976 

28.980 

28.984 

28.988 

28.992 

28.996 

29.000 

29.004 

29.008 

29.012 

737 

29.016 

29.020 

29.024 

29.028 

29.031 

29.035 

29.039 

29.043 

29.047 

29.051 

733 

29.055 

29.059 

29.063 

29.067 

29.071 

29.075 

29.079 

29.083 

29.087 

29.090 

739 

29.094 

29.098 

29.  IO2 

29.106 

29.110 

29.114 

29.118 

29.122 

29.126 

29.130 

740 

29-  J  34 

29.138 

29.142 

29.  146 

29.150 

29.153 

29.157 

29.161 

29.165 

29.169 

74i 

29.173 

29.177 

29.l8l 

29.185 

29.189 

29.193 

29.197 

29.201 

29.205 

29.209 

742 

29.213 

29.216 

29.220 

29.224 

29.228 

29.232 

29.236 

29.240 

29.244 

29.248 

743 

29.252 

29-256 

29.260 

29.264 

29.268 

29.272 

29.276 

29.279 

29.283 

29.287 

744 

29.291 

29.295 

29.299 

29.303 

29.307 

29.311 

29.315 

29.319 

29.323 

29.327 

745 

29.331 

29.335 

29.339 

29.342 

29.346 

29.350 

29.354 

29.358 

29.362 

29.366 

746 

29.370 

29.374 

29.378 

29.382 

29.386 

29.390 

29.394 

29.398 

29.402 

29.405 

747 

29.409 

29.4I3 

29.417 

29.421 

29.425 

29.429 

29.433 

29-437 

29.441 

29.445 

748 

29.449 

29-453 

29-457 

29.461 

29.465 

29.468 

29.472 

29.476 

29.480 

29.484 

749 

29.488 

29.492 

29.496 

29.500 

29.504 

29.508 

29.512 

29.516 

29.520 

29.524 

750 

29.528 

29.53I 

29.535 

29.539 

29.543 

29.547 

29.55I 

29.555 

29-559 

29.563 

SMITHSONIAN  TABLES. 


194 


TABLE  65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


Milli- 
metres. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

750 

29.528 

29.531 

29.535 

29.539 

29-543 

29.547 

29.551 

29-555 

29.559 

29.563 

75i 

29.567 

29.571 

29-575 

29.579 

29.583 

29.587 

29.590 

29.594 

29.598 

29.602 

752 

29.606 

29.610 

29.614 

29.618 

29.622 

29.626 

29.630 

29.634 

29.638 

29.642 

753 

29.646 

29.650 

29.653 

29.657 

29.661 

29.665 

29.669 

29.673 

29.677 

29.681 

754 

29.685 

29.689 

29.693 

29.697 

29.701 

29.705 

29.709 

29.713 

29.716 

29.  720 

755 

29.724 

29.728 

29.732 

29.736 

29.740 

29.744 

29.748 

29.752 

29.756 

29.760 

756 

29.764 

29.768 

29.772 

29.776 

29.779 

29.783 

29.787 

29.791 

29.795 

29.799 

757 

29.803 

29.807 

29.811 

29.815 

29.819 

29.823 

29.827 

29.831 

29.835 

29.839 

758 

29.842 

29.846 

29.850 

29.854 

29-858 

29.862 

29.866 

29.870 

29.874 

29.878 

759 

29.882 

29.886 

29.890 

29.894 

29.898 

29.902 

29.905 

29.909 

29.913 

29.917 

760 

29.921 

29.925 

29.929 

29-933 

29.937 

29.941 

29-945 

29.949 

29-953 

29.957 

761 

29.961 

29.965 

29.968 

29.972 

29.976 

29.980 

29.984 

29.988 

29.992 

29.996 

762 

30.000 

30.004 

30.008 

30.012 

30.016 

30.020 

•  30.024 

30.027 

30.031 

30.035 

763 

30.039 

30.043 

30.047 

30.051 

30.055 

30.059 

30.063 

30.067 

30.071 

30.075 

764 

30.079 

30.083 

30.087 

30.090 

30.094 

30.098 

30.  102 

30.106 

30.110 

30.H4 

765 

30.II8 

30.122 

30.126 

30.130 

3°-I34 

30.138 

30.142 

30.146 

30.150 

30.153 

766 

30.157 

30.161 

30.165 

30.169 

30.173 

30.177 

30.I8I 

30.185 

30.189 

30.193 

767 

30.197 

30.201 

30.205 

30.209 

30.213 

30.216 

30.220 

30.224 

30.228 

30.232 

768 

30.236 

30.240 

30.244 

30.248 

30-252 

30.256 

30.260 

30.264 

30.268 

30.272 

769 

30.276 

30.279 

30.283 

30.287 

30.291 

30.295 

30.299 

30.303 

30.307 

30.3H 

770 

30.315 

30.319 

30.323 

30.327 

30.331 

30.335 

30.339 

30.342 

30.346 

30.350 

771 

30.354 

30.358 

30.362 

30.366 

30.370 

30.374 

30.378 

30.382 

30.386 

30.390 

772 

30-394 

30.398 

30.402 

30.405 

30.409 

30.413 

30.417 

30.421 

30.425 

30.429 

.  773 

30.433 

30.437 

30.441 

30.445 

30.449 

30.453 

30.457 

30.461 

30.465 

30.468 

774 

30.472 

30.476 

30.480 

30.484 

30.488 

30.492 

30.496 

30.500 

30.504 

30.508 

775 

30.512 

30.516 

30.520 

30.524 

30.528 

30.531 

30.535 

30.539 

30.543 

30.547 

776 

30.551 

30.555 

30.559 

30.563 

30.567 

30.571 

30.575 

30.579 

30.583 

30.587 

777 

30.590 

30.594 

30.598 

30.602 

30.606 

30.610 

30.614 

30.618 

30.622 

30.626 

778 

30.630 

30.634 

30.638 

30-642 

30.646 

30.650 

30.653 

30.657 

30.661 

30.665 

779 

30.669 

30.673 

30.677 

30.681 

30.685 

30.689 

30.693 

30.697 

30.701 

30.705 

780 

30.709 

30.713 

30.716 

30.720 

30.724 

30.728 

30.732 

30.736 

30.740 

30.744 

781 

30.748 

30.752 

30.756 

30.760 

30.764 

30.768 

30.772 

30.776 

30.779 

30.783 

782 

30.787 

30.791 

30.795 

30.799 

30.803 

30.807 

30.8II 

30.815 

30.819 

30.823 

783 

30.827 

30.831 

30.835 

30-839 

30.842 

30.846 

30.850 

30.854 

30.858 

30.862 

784 

30.866 

30.870 

30.874 

30.878 

30.882 

30.886 

30.890 

30.894 

30.898 

30.902 

785 

30.905 

30.909 

30.913 

30.917 

30.921 

30.925 

30.929 

30.933 

30.937 

30.941 

786 

30.945 

30.949 

30.953 

30.957 

30.961 

30.965 

30.968 

30.972 

30.976 

30.980 

787 

30.984 

30.988 

30.992 

30.996 

31.000 

31.004 

31.008 

31.012 

31.016 

31.020 

788 

31.024 

31.027 

3L03I 

3L035 

31-039 

31.043 

3L047 

3L05I 

3L055 

3L059 

789 

31.063 

3L067 

3L07I 

3L075 

31.079 

31.083 

31.087 

31.090 

3L094 

31.098 

790 

31.102 

31.106 

31.110 

31.114 

31.118 

31.122 

31.126 

3LI30 

3LI34 

3LI38 

791 

31.142 

3LI46 

3LI50 

3LI53 

3LI57 

3I.l6l 

31-165 

31-169 

3LI73 

3I-I77 

792 

3I.l8l 

3LI85 

31.189 

3LI93 

3LI97 

31.201 

31.205 

3L2I3 

31.216 

793 

31.220 

31.224 

31.228 

31.232 

31.236 

31.240 

3L244 

31.248 

3L252 

31.256 

794 

31.260 

31.264 

31.268 

3L272 

31.276 

31.279 

31.283 

3L287 

31.291 

3L295 

795 

31.299 

3L303 

3L307 

3I.3H 

3L3I5 

3L3T9 

3L323 

3L327 

3L33I 

3L335 

796 

31-339 

3L342 

3L346 

3L350 

3^.354 

3L358 

31.362 

31.366 

3L370 

3L374 

797 

31.378 

3L382 

31.386 

3L390 

31-394 

3L398 

31.402 

3L405 

31.409 

31.413 

798 

3L4I7 

31.421 

31.425 

3L429 

3L433 

31-437 

31.441 

3L445 

3J.449 

3L453 

799 

31-457 

3L46l 

3L465 

3L468 

3L472 

3L476 

31.480 

31.484 

31.488 

3L492 

800 

31.496 

31.500 

3L504 

3L508 

3L5I2 

3L5I6 

3L520 

3L524 

3L527 

3L53I 

SMITHSONIAN  TABLES. 


195 


TABLE  65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


Milli- 
metres. 

.0 

•' 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

800 

31.496 

3L500 

3L504 

31.508 

3L5I2 

31.516 

3L520 

3L524 

3J-527 

3I-53I 

801 

3I-535 

31-539 

31-543 

3L547 

3L55I 

3L555 

31-559 

3L563 

31.567 

3L57I 

802 

31-575 

31-579 

31.583 

3L587 

3I-590 

3L594 

3L598 

31.602 

31.606 

31.610 

803 

31.614 

31.618 

31.622 

31.626 

31.630 

31.634 

31.638 

31.642 

31.646 

3L650 

804 

3I-653 

3L657 

3T.66I 

31.665 

31.669 

31.673 

31.677 

31.681 

31.685 

3L689 

805 

31-693 

31.697 

31.701 

3L705 

31.709 

3L7I3 

31.716 

31.720 

31.724 

31.728 

806 

3I-732 

3J.736 

31.740 

31-744 

3L748 

3L752 

31.756 

31.760 

31.764 

31.768 

807 

31.772 

31.776 

31-779 

3L783 

3L787 

3L79I 

31-795 

3L799 

31.803 

31-807 

808 

31.811 

31.815 

31.819 

31.823 

31.827 

31.831 

31.835 

31.839 

31.842 

31.846 

809 

31-850 

31.854 

31.858 

31.862 

31.866 

31.870 

3L874 

3L878 

31.882 

31.886 

810 

31.890 

31.894 

31.898 

31.902 

3L905 

31.909 

3L9I3 

31.917 

31.921 

3L925 

811 

31.929 

31.933 

3L937 

3L94I 

3L945 

3L949 

31.953 

3L957 

31.961 

3L965 

812 

31-968 

31.972 

31.976 

31.980 

31.984 

31.988 

31.992 

31.996 

32.000 

32.004 

813 

32.008 

32.012 

32.016 

32.020 

32.024 

32.027 

32.031 

32.035 

32.039 

32.043 

814 

32.047 

32.051 

32.055 

32.059 

32.063 

32.067 

32.071 

32.075 

32.079 

32.083 

815 

32.087 

32.090 

32.094 

32.098 

32.102 

32.106 

32.110 

32.114 

32.118 

32.122 

816 

32.126 

32.130 

32.134 

32.138 

32.142 

32.146 

32.150 

32.153 

32.157 

32.161 

817 

32-165 

32.169 

32.173 

32.177 

32.181 

32-185 

32.189 

32.193 

32.197 

32.201 

818 

32.205 

32.209 

32.213 

32.216 

32.220 

32.224 

32.228 

32.232 

32.236 

32.240 

819 

32-244 

32.248 

32.252 

32.256 

32.260 

32.264 

32.268 

32.272 

32.276 

32.279 

820 

32.283 

32.287 

32.291 

32.295 

32.299 

32.303 

32.307 

32.311 

32.315 

32.319  i 

821 

32.323 

32.327 

32.331 

32.335 

32.339 

32.342 

32.346 

32.350 

32.354 

32.358  j 

822 

32.362 

32.366 

32.370 

32.374 

32.378 

32.382 

32.386 

32.390 

32.394 

32.398  ! 

823 

32.402 

32.405 

32.409 

22.413 

32.417 

32.421 

32.425 

32.429 

32.433 

32.437 

824 

32.441 

32.445 

32.449 

32.453 

32.457 

32.461 

32.465 

32.468 

32.472 

32.476 

825 

32.480 

32.484 

32.488 

32.492 

32.496 

32.500 

32.504 

32.508 

32.512 

32.516! 

826 

32-520 

32.524 

32.527 

32.531 

32.535 

32.539 

32.543 

32.547 

32.551 

32.555 

827 

32.559 

32.563 

32.567 

32.5/1 

32.575 

32.579 

32.583 

32.587 

32.590 

32.594  : 

828 

32.598 

32.602 

32.606 

32.610 

32.614 

32.618 

32.622 

32.626 

32.630 

32.634 

829 

32.638 

32.642 

32.646 

32.650 

32.653 

32.657 

32.661 

32.665 

32.669 

32.673  i 

830 

32.677 

32.681 

32.685 

32-689 

32.693 

32.697 

32.701 

32.705 

32.709 

32.713 

831 

32.716 

32.720 

32.724 

32.728 

32.732 

32.736 

32.740 

32.744 

32.748 

32.752 

832 

32.756 

32.760 

32.764 

32.768 

32.772 

32.776 

32.779 

32.783 

32.787 

32.791 

833 

32.795 

32.799 

32.803 

32.807 

32.811 

32-815 

32.819 

32.823 

32.827 

32.831 

834 

32.835 

32.839 

32.842 

32.846 

32.850 

32.854 

32.858 

32.862 

32.866 

32.870 

835 

32.874 

32.878 

32.882 

32.886 

32.890 

32-894 

32.898 

32.902 

32.905 

32.909 

836 

32.913 

32.917 

32.921 

32.925 

32.929 

32.933 

32.937 

32.941 

32.945 

32.949 

837 

32.953 

32.957 

32.961 

32.965 

32.968 

32.972 

32.976 

32.980 

32.984 

32.988 

838 

32-992 

32.996 

33.000 

33.004 

33.008 

33-oi2 

33.016 

33-020 

33.024 

33.027 

839 

33.031 

33-035 

33.039 

33.043 

33-047 

33-05I 

33-055 

33-059 

33.063 

33.067 

840 

33.071 

33-075 

33-079 

33.083 

33-087 

33.090 

33-094 

33.098 

33.102 

33.106 

841 

33-no 

33-114 

33-118 

33.122 

33.126 

33-I30 

33-134 

33.138 

33.142 

33-146 

842 

33.150 

33-153 

33-157 

33-i6i 

33.165 

33-169 

33-173 

33-177 

33.181 

33-185 

843 

33-189 

33.193 

33-197 

33-201 

33-205 

33.209 

33.213 

33.216 

33.220 

33-224 

844 

33-228 

33-232 

33.236 

33.240 

33-244 

33-248 

33.252 

33.256 

33.260 

33.264 

845 

33-268 

33.272 

33.276 

33-279 

33.283 

33-287 

33-29I 

33-295 

33.299 

33.303 

846 

33.307 

33.311 

33-3I5 

33.319 

33.323 

33.327 

33-331 

33-335 

33-339 

33.342 

847 

33.346 

33.350 

33-354 

33-358 

33.362 

33.366 

33-370 

33-374 

33.378 

33-382 

848 

33.386 

33-390 

33-394 

33.398 

33.402 

33-405 

33.409 

33.4I3 

33.417 

33-421 

849 

33-425 

33.429 

33-433 

33-437 

33-441 

33-445 

33-449 

33-453 

33-457 

33-461 

850 

33.464 

33.468 

33-472 

33.476 

33.480 

33484 

33.488 

33.492 

33.496 

33.500 

SMITHSONIAN  TABLES. 


196 


TABLE  65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


Milli- 
metres. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches  . 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

850 

33-464 

33-468 

33.472 

33476 

33.480 

33.484 

33488 

33-492 

33-496 

33-500 

851 

33-504 

33-508 

33-512 

33.516 

33.520 

33.524 

33.527 

33-531 

33-535 

33-539 

852 

33-543 

33-547 

33-551 

33-555 

33-559 

33.563 

33-567 

33-571 

33-575 

33-579 

853 

33.583 

33.587 

33.590 

33-594 

33.598 

33.602 

33.606 

33.610 

33-614 

33-6i8 

854 

33.622 

33.626 

33.630 

33.634 

33.638 

33.646 

33.650 

33-653 

33.657 

855 

33.661 

33.665 

33.669 

33.673 

33.677 

33.681 

33.685 

33.689 

33-693 

33.697 

856 

33.701 

33.705 

33.709 

33.713 

33.716 

33.720 

33.724 

33.728 

33-732 

33.736 

857 

33.740 

33-744 

33-748 

33-752 

33.756 

33.760 

33.764 

33.768 

33-772 

33.776 

858 

33.779 

33.783 

33-787 

33-791 

33-795 

33.799 

33-803 

33.807 

33-811 

33.815 

859 

33.819 

33-823 

33.827 

33-831 

33.835 

33.839 

33.846 

33.850 

33.854 

860 

33.858 

33-862 

33-866 

33.870 

33.874 

33.878 

33.882 

33.886 

33-890 

33.894 

861 

33.898 

33.902 

33.905 

33.909 

33.9I3 

33.917 

33.921 

33.925 

33.929 

33-933 

862 

33-937 

33.941 

33-945 

33-949 

33-953 

33-957 

33.96I 

33.964 

33.968 

33-972 

863 

33-976 

33.980 

33-984 

33.988 

33-992 

33.996 

34.000 

34.004 

34.008 

34-012 

864 

34.016 

34.020 

34.024 

34-027 

34.031 

34.035 

34.039 

34.043 

34.047 

34.051 

865 

34.055 

34.059 

34-063 

34-067 

34.071 

34.075 

34.079 

34.083 

34-087 

34.090 

866 

34-094 

34-098 

34.102 

34-io6 

34.110 

34.H4 

34.118 

34.122 

34.126 

34.130 

867 

34-134 

34.138 

34.142 

34.146 

34.150 

34.153 

34.157 

34.161 

34-165 

34.169 

868 

34-173 

34.177 

34.181 

34.185 

34.189 

34-193 

34.197 

34.201 

34-205 

34.209 

869 

34-213 

34.216 

34.220 

34.224 

34-228 

34.232 

34.236 

34.240 

34.244 

34.248 

870 

34.252 

34.256 

34.260 

34.264 

34.268 

34.272 

34.276 

34.279 

34-283 

34-287 

871 

34-291 

34.295 

34.299 

34.303 

34.307 

34-311 

34.315 

34.319 

34-323 

34.327 

872 

34-331 

34-335 

34-339 

34.342 

34.346 

34o50 

34-354 

34.358 

34.362 

34.366 

873 

34-370 

34-374 

34.378 

34-382 

34.386 

34-39° 

34-394 

34.398 

34.402 

34.405 

874 

34.409 

34.413 

34.417 

34.421 

34.425 

34.429 

34-433 

34-437 

34-441 

34.445 

875 

34-449 

34-453 

34-457 

34.461 

34.464 

24.468 

34-472 

34.476 

34.48o 

34.484 

876 

34.488 

34.492 

34.496 

34-500 

34.504 

34.508 

34.512 

34.520 

34.524 

877 

34.527 

34.531 

34-535 

34-539 

34-543 

34-547 

34.551 

34.555 

34-559 

34.563 

8*-Q 
yo 

34.567 

34-571 

34-575 

34-579 

34-583 

34.587 

34.590 

34-594 

34.598 

34.602 

879 

34.606 

34.610 

34.6i4 

34-6i8 

34.622 

34.626 

34-630 

34.634 

34.638 

34.642 

880 

34-646 

34-650 

34.653 

34.657 

34.66i 

34.665 

34-669 

34.673 

34.677 

34.681 

881 

34.685 

34-689 

34.693 

34.697 

34.701 

34.705 

34.709 

34.713 

34.716 

34-720 

882 

34.724 

34.728 

34.732 

34.736 

34.740 

34-744 

34.748 

34.752 

34.756 

34.76o 

883 

34.764 

34.768 

34.772 

34.776 

34-779 

34.783 

34.787 

34.791 

34.795 

34-799 

884 

34-803 

34.807 

34.811 

34.815 

34-819 

34.823 

34.827 

34.831 

34.835 

34.839 

885 

34.842 

34.846 

34.850 

34.854 

34.858 

34.862 

34.866 

34.870 

34.874 

34.878 

886 

34.882 

34.886 

34.890 

34.894 

34.898 

34.902 

34.905 

34.909 

34.913 

34.917 

887 

34.921 

34.925 

34.929 

34-933 

34-937 

34-941 

34-945 

34-949 

34-953 

34-957 

888 

34.964 

34.968 

34.972 

34.976 

34.980 

34.984 

34.988 

34-992 

34.996 

889 

35.000 

35-004 

35.oo8 

35-012 

35.oi6 

35-020 

35.024 

35.027 

35-031 

35.035 

890 

35.039 

35-043 

35.047 

35-051 

35.055 

35.059 

35-063 

35-067 

35.071 

35.075 

891 

35.079 

35-083 

35.087 

35-090 

35.094 

35.098 

35-102 

35-106 

35.no 

35.H4 

892 

35-118 

35-122 

35.126 

35.130 

35.134 

35.138 

35.142 

35.I46 

35.150 

35.153 

893 

35-157 

35.161 

35.165 

35.169 

35.173 

35.177 

35.18! 

35.185 

35.189 

35.193 

894 

35-197 

35-201 

35-205 

35-209 

35.213 

35-216 

35.220 

35.224 

35-228 

35.232 

895 

35.236 

35-240 

35.244 

35-248 

35.252 

35.256 

35.26o 

35-264 

35.268 

35.272 

896 

35.276 

35.279 

35.283 

35.287 

35.291 

35.295 

35.299 

35.303 

35.307 

35.311 

897 

35.315 

35.319 

35.323 

35.327 

35.331 

35-335 

35-339 

35.342 

35.346 

35.350 

898 

35-354 

35.358 

35.362 

35-366 

35-370 

35.374 

35.378 

35.382 

35-386 

35.390 

899 

35-394 

35.398 

35-402 

35.405 

35409 

35.413 

35.417 

35.421 

35.425 

35.429 

900 

35-433 

35-437 

35.441 

35-445 

35-449 

35-453 

35.457 

35.461 

35.464 

35468 

SMITHSONIAN  TABLES. 


197 


TABLE  65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch* 


Milli- 
metres. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

900 

35-433 

35-437 

35441 

35-445 

35-449 

35453 

35-457 

35-46I 

35464 

35.468 

901 

35-472 

35.476 

35.480 

35.484 

35.488 

35492 

35.496 

35.500 

35.504 

35.508 

902 

35-512 

35.516 

35.520 

35.524 

35.527 

35-531 

35.535 

35.539 

35-543 

35-547 

9°3 

35-551 

35-555 

35-559 

35.563 

35.567 

35-571 

35.575 

35.579 

35.583 

35.587 

904 

35.590 

35-594 

35.598 

35-602 

35.6o6 

35.610 

35.614 

35.618 

35.622 

35.626 

905 

35.630 

35.634 

35.638 

35.642 

35.646 

35.650 

35.653 

35.657 

35.661 

35.665 

906 

35.669 

35.673 

35.677 

35.681 

35.685 

35.689 

35.693 

35.697 

35.701 

35.705 

907 

35-709 

35.713 

35.716 

35.720 

35.724 

35.728 

35.732 

35.736 

35-740 

35.744 

908 

35.748 

35.752 

35.756 

35.760 

35.764 

35.768 

35.772 

35.776 

35-779 

35.783 

909 

35.787 

35-791 

35-795 

35.799 

35.803 

35.807 

35.811 

35-815 

35.8i9 

35-823 

910 

35.827 

35.831 

35.835 

35.839 

35.842 

35.846 

35.850 

35.854 

35.858 

35-862 

911 

35-866 

35.870 

35.874 

35.878 

35.882 

35-886 

35.890 

35.894 

35-898 

35.902 

912 

35.905 

35.909 

35.913 

35-9*7 

35.921 

35.925 

35.929 

35-933 

35-937 

35-941 

913 

35-945 

35-949 

35-953 

35.957 

35.961 

35.964 

35.968 

35-972 

35.976 

35.98o 

914 

35.984 

35.988 

35.992 

35.996 

36.000 

36.004 

36.008 

36.012 

36.016 

36.020 

915 

36-024 

36.027 

36.031 

36.035 

36.039 

36.043 

36.047 

36-051 

36-055 

36.059 

916 

36.063 

36.067 

36.071 

36.075 

36.079 

36-083 

36-087 

36.090 

36.094 

36.098 

917 

36.  102 

36.  1  06 

36.110 

36.114 

36.118 

36.122 

36.126 

36.130 

36.134 

36.138 

918 

36.142 

36.  146 

36.150 

36.153 

36.157 

36.161 

36.165 

36.169 

36-173 

36.177 

919 

36.181 

36-185 

36.189 

36.193 

36.197 

36.201 

36.205 

36.209 

36.213 

36.216 

920 

36.220 

36.224 

36.228 

36.232 

36.236 

36.240 

36.244 

36.248 

36.252 

36.256 

921 

36.260 

36.264 

36.268 

36.272 

36.276 

36.279 

36.283 

36-287 

36.291 

36-295 

922 

36.299 

36.303 

36.307 

36-311 

36.315 

36.319 

36.323 

36.327 

36-331 

36.335 

923 

36.339 

36.342 

36-346 

36-350 

36.354 

36.358 

36.362 

36-366 

36.370 

36.374 

924 

36.378 

36.382 

36-386 

36.39° 

36.394 

36.398 

36.402 

36.405 

36.409 

36.413 

925 

36.417 

36.421 

36.425 

36.429 

36.433 

36.437 

36.441 

36.445 

36.449 

36.453 

926 

36.457 

36.461 

36.464 

36.468 

36.472 

36.476 

36.480 

36-484 

36.488 

36.492 

927 

36.496 

36-500 

36.504 

36-508 

36.512 

36-516 

36.520 

36-524 

36.527 

36.53T 

928 

36.535 

36.539 

36.543 

36.547 

36.551 

36.555 

36.559 

36.563 

36-567 

36.571 

929 

36.575 

36.579 

36-583 

36-587 

36.590 

36.594 

36.598 

36.602 

36.606 

36.610 

930 

36.614 

36.618 

36.622 

36.626 

36.630 

36-634 

36.638 

36.642 

36.646 

36.650 

93i 

36.653 

36.657 

36.661 

36.665 

36.669 

36.673 

36.677 

36.681 

36.685 

36.689 

932 

36.693 

36.697 

36.701 

36.705 

36.709 

36.713 

36.716 

36.720 

36-724 

36.728 

933 

36.732 

36.736 

36.740 

36.744 

36.748 

36.752 

36.756 

36.760 

36.764 

36.768 

934 

36.772 

36.776 

36.779 

36.783 

36.787 

36.791 

36.795 

36.799 

36.803 

36.807 

935 

36.811 

36.815 

36.819 

36.823 

36.827 

36.831 

36.835 

36-839 

36.842 

36.846 

936 

36.850 

36.854 

36.858 

36.862 

36.866 

36.870 

36.874 

36.878 

36.882 

36.886 

937 

36.890 

36.894 

36.898 

36.902 

36.905 

36.909 

36.913 

36.917 

36.921 

36-925 

938 

36.929 

36.933 

36.937 

36.941 

36.945 

36.949 

36.953 

36.957 

36.961 

36.964 

939 

36.968 

36.972 

36.976 

36.980 

36.984 

36.988 

36.992 

36.996 

37.000 

37.004 

940 

37.008 

37-012 

37.016 

37.020 

37.024 

37.027 

37.031 

37.035 

37-039 

37-043 

941 

37.047 

37.051 

37.055 

37-059 

37.063 

37.o67 

37.071 

37.075 

37.079 

37-083 

942 

37.087 

37.090 

37.094 

37-098 

37.102 

37.106 

37.110 

37.H4 

37.118 

37.122 

943 

37.126 

37-130 

37-134 

37.138 

37.142 

37.146 

37.150 

37-153 

37.157 

37.161 

944 

37.165 

37.169 

37-173 

37-177 

37.181 

37.185 

37.189 

37.193 

37.197 

37.201 

945 

37.204 

37.208 

37.212 

37.216 

37.220 

37-224 

37.228 

37.232 

37.236 

37.240 

946 

37.244 

37.248 

37-252 

37.256 

37.260 

37.264 

37.268 

37.272 

37.276 

37.279 

947 

37.283 

37-287 

37.291 

37.295 

37.299 

37.303 

37.307 

37.3H 

37.3J5 

37-3I9 

948 

37.323 

37.327 

37-331 

37-335 

37-339 

37-342 

37.346 

37.350 

37-354 

37.358 

949 

37.362 

37-366 

37-370 

37-374 

37.378 

37.382 

37.386 

37-390 

37-394 

37.398 

950 

37.402 

37.405 

37409 

37.413 

37.417 

37.421 

37425 

37.429 

37-433 

37437 

SMITHSONIAN  TABLES. 


198 


TABLE  65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


Milli- 
metres. 

.0 

' 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

950 

37.402 

37.405 

37.409 

37.413 

37.417 

37-421 

37.425 

37.429 

37-433 

37-437 

95i 

37-441 

37.445 

37-449 

37-453 

37-457 

37.461 

37.464 

37.468 

37.472 

37.476 

952 

37.480 

37.484 

37.488 

37.492 

37.496 

37.500 

37.504 

37.508 

37-512 

37.516 

953 

37-520 

37.524 

37.527 

37.531 

37-535 

37-539 

37-543 

37-547 

37.551 

37-555 

954 

37-559 

37.563 

37.567 

37.571 

37-575 

37-579 

37.583 

37.587 

37.590 

37-594 

955 

37.598 

37.602 

37.6o6 

37.610 

37.614 

37.6i8 

37.622 

37.626 

37.630 

37-634 

\j  i    *-'r 

956 

37.638 

37.642 

37-646 

37.650 

37.653 

37.657 

37-661 

37.665 

37.669 

37.673 

957 

37.677 

37.681 

37.685 

37.689 

37.693 

37.697 

37-701 

37.705 

37.709 

37.713 

958 

37.716 

37.720 

37.724 

37.728 

37.732 

37.736 

37.740 

37.744 

37.748 

37-752 

959 

37.756 

37.760 

37.764 

37.768 

37.772 

37.776 

37-779 

37.783 

37.787 

37-791 

960 

37-795 

37-799 

37.803 

37.807 

37-811 

37.815 

37.819 

37-823 

37.827 

37-831 

961 

37.835 

37.839 

37.842 

37.846 

37-850 

37.854 

37.858 

37-862 

37.866 

37.870 

962 

37.874 

37.878 

37.882 

37-886 

37-890 

37.894 

37-898 

37.901 

37.905 

37.909 

963 

37-9J3 

37-9J7 

37.921 

37.925 

37.929 

37-933 

37-937 

37-941 

37-945 

37-949 

964 

37.953 

37.957 

37.961 

37.964 

37.968 

37.972 

37.976 

37.980 

37.984 

37.988 

965 

37.992 

37.996 

38.000 

38.004 

38.008 

38.012 

38.016 

38.020 

38.024 

38-027 

966 

38.031 

38-035 

38.039 

38.043 

38.047 

38.051 

38.055 

38.059 

38.063 

38.067 

967 

38.071 

38.075 

38.079 

38.083 

38.087 

38.090 

38.094 

38.098 

38.102 

38.106 

968 

38.110 

38.114 

38.118 

38.122 

38.126 

38.130 

38.134 

38-138 

38.142 

38.146 

969 

38.150 

38.153 

38.157 

38.161 

38.165 

38.169 

38.173 

38.177 

38.181 

38.185 

970 

38.189 

38.193 

38.197 

38.201 

38-205 

38.209 

38.213 

38.216 

38.220 

38.224 

971 

38.228 

38.232 

38.236 

38.240 

38.244 

38.248 

38-252 

38.256 

38.260 

38.264 

972 

38.268 

38.272 

38.276 

38.279 

38.283 

38.287 

38.291 

38.295 

38.299 

38.303 

973 

38.307 

38.311 

38.315 

38.319 

38-323 

38.327 

38.331 

38.335 

38.339 

38-342 

974 

38.346 

38.350 

38.354 

38.358 

38.362 

38.366 

38.370 

38.374 

38.378 

38.382 

975 

38.386 

38-39° 

38.394 

38.398 

38-401 

38.405 

38.409 

38.413 

38.417 

38.421 

976 

38.425 

38.429 

38.433 

38.437 

38.441 

38.445 

38.449 

38.453 

38-457 

38.461 

977 

38.464 

38.468 

38.472 

38.476 

38.480 

38.484 

38.488 

38.492 

38.496 

38.500 

978 

38-504 

38.508 

38.512 

38-516 

38.520 

38.524 

38.527 

38.531 

38.535 

38.539 

979 

38.543 

38.547 

38.551 

38.555 

38-559 

38.563 

38.567 

38.571 

38.575 

38.579 

980 

38-583 

38.587 

38.590 

38.594 

38.598 

38.602 

38.606 

38.610 

38.614 

38.618 

981 

38.622 

38.626 

38.630 

38.634 

38.638 

38.642 

38.646 

38.650 

38.653 

38.657 

982 

38.661 

38.665 

38.669 

38.673 

38.677 

38.681 

38.685 

38.689 

38.693 

38.697 

983 

38.701 

38.705 

38.709 

38.713 

38.716 

38.720 

38-724 

38.728 

38.732 

38.736 

984 

38.740 

38.744 

38.748 

38.752 

38.756 

38.760 

38.764 

38.768 

38.772 

38.776 

985 

38.780 

38.783 

38-787 

38.791 

38.795 

38.799 

38.803 

38.807 

38.811 

38.815 

986 

38.819 

38.823 

38.827 

38-831 

38.835 

38.839 

38.842 

38.846 

38.850 

38.854 

987 

38.858 

38.862 

38.866 

38.870 

38.874 

38.878 

38.882 

38.886 

38.890 

38.894 

988 

38.898 

38.901 

38-905 

38.909 

38.913 

38.917 

38.921 

38.925 

38.929 

38.933 

989 

38.937 

38.941 

38.945 

38.949 

38.953 

38.957 

38-961 

38.964 

38.968 

38.972 

990 

38.976 

38.980 

38.984 

38.988 

38.992 

38.996 

39.000 

39.004 

39.008 

39.012 

991 

39.oi6 

39.020 

39.024 

39.027 

39-031 

39-035 

39.039 

39.043 

39-047 

39.051 

992 

39.055 

39-059 

39-o63 

39-067 

39.071 

39.075 

39.079 

39-083 

39.087 

39.090 

993 

39-°94 

39.098 

39.102 

39.106 

39.110 

39.H4 

39.H8 

39.122 

39.126 

39-I30 

994 

39.134 

39-I38 

39.142 

39.I46 

39-150 

39-I53 

39.157 

39.161 

39-!65 

39.169 

995 

39.173 

39-177 

39.181 

39.185 

39-189 

39-193 

39.197 

39-201 

39.205 

39-209 

996 

39-213 

39.216 

39.220 

39.224 

39.228 

39.232 

39.236 

39.240 

39-244 

39.248 

997 

39-252 

39-256 

39.260 

39.264 

39-268 

39-272 

39.276 

39-279 

39-283 

39.287 

998 

39.291 

39-295 

39-299 

39.303 

39-307 

39.3H 

39.3I5 

39.319 

39-323 

39.327 

999 

39.331 

39.335 

39-339 

39-342 

39.346 

39.350 

39-354 

39.358 

39.362 

39.366 

1000 

39-370 

39-374 

39-378 

39-382 

39.386 

39-390 

39-394 

39.398 

39.401 

39-405 

SMITHSONIAN  TABLES. 


I99 


TABLE    66. 


FEET    INTO    METRES. 

i  £001  =  0.3048006  metre. 


Feet. 

0 

1 

2 

3 

4 

5 

6 

7 

8 

9 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

0 

o.ooo 

0.305 

0.610 

0.914 

1.219 

1.524 

1.829 

2.134 

2.438 

2-743 

10 

3.048 

3.353 

3.658 

3-962 

4.267 

4.572 

4.877 

5.182 

5.486 

5-791 

20 

6.096 

6.401 

6.706 

7.OIO 

7-3*5 

7.620 

7.925 

8.230 

8.534 

8.839 

30 

9.144 

9-449 

9-754 

10.058 

10.363 

10.668 

10.973 

11.278 

11.582 

11.887 

40 

12.192 

12.497 

12.802 

13.106 

13.411 

13.716 

14.021 

14.326 

14.630 

14-935 

50 

15.240 

15.545 

15-850 

16.154 

16.459 

16.764 

17.069 

17-374 

17.678 

17-983 

60 

18.288 

18.593 

18.898 

19.202 

19-507 

19.812 

20.117 

20.422 

20.726 

21.031 

70 

21.336 

21.641 

21.946 

22.250 

22.555 

22.860 

23-I65 

23.470 

23.774 

24.079 

80 

24.384 

24.689 

24-994 

25.298 

25.603 

25.908 

26.213 

26.518 

26.822 

27.127 

90, 

27.432 

27.737 

28.042 

28.346 

28.651 

28.956 

29.261 

29.566 

29.870 

30.175 

0 

10 

20 

30 

40 

50 

60 

70 

80 

90 

100   I 

30.48 

33.53 

36.58 

39.62 

42.67 

45.72 

48.77 

51-82 

54-86 

57-91 

200 

60.96 

64.01 

67.06 

70.10 

73.15 

76.20 

79-25 

82.30 

85.34 

88.39 

300 

91.44 

94-49 

97-54 

100.58 

103.63 

106.68 

109.73 

112.78 

115.82 

118.87 

4°° 

121.92 

124.97 

128.02 

131.06 

134.11 

137.16 

140.21 

143.26 

146.30 

149-35 

500 

152.40 

155-45 

158.50 

161.54 

164-59 

167.64 

170.69 

173-74 

176.78 

179-83 

600 

182.88 

185.93 

188.98 

192.02 

195.07 

198.12 

201.17 

204.22 

207.26 

210.31 

?oo 

213.36 

216.41 

219.46 

222.50 

225-55 

228.60 

231-65 

234.70 

237-74 

240.79 

#00 

243.84 

246.89 

249-94 

252.98 

256.03 

259.08 

262.13 

265.18 

268.22 

271.27 

19°°    ; 

274.32 

277.37 

280.42 

283.46 

286.51 

289.56 

292.61 

295-66 

298.70 

301.75 

1000 

304.80 

307.85 

310.90 

313.94 

316.99 

320.04 

323.09 

326.14 

329.18 

332.23 

1  100 

335.28 

338.33 

34L38 

344.42 

347-47 

350.52 

353-57 

356.62 

359.67 

362.71 

I2OO 

365-76 

368.81 

371.86 

374.90 

377-95 

381.00 

384-05 

387.10 

390.14 

393.19 

1300 

396.24 

399.29 

402.34 

405-38 

408.43 

411.48 

4I4-53 

417.58 

420.62 

423-67 

1400 

426.72 

429.77 

432.82 

435-86 

438.91 

441.96 

445-01 

448.06 

451-10 

454-15 

1500 

457.20 

460.25 

463-30 

466.34 

469-39 

472.44 

475-49 

478.54 

481.58 

484.63 

1600 

487.68 

490.73 

493.78 

496.82 

499.87 

502.92 

505.97 

509.02 

512.07 

SIS-" 

1700 

518.16 

521.21 

524-26 

527-31 

530.35 

533-40 

536.45 

539.50 

542-55 

545-59 

1800 

548.64 

551-69 

554-74 

557-79 

560.83 

563.88 

566.93 

569.98 

573.03 

576.07 

1900 

579-12 

582.17 

585-22 

588.27 

59I-3I 

594.36 

597-41 

600.46 

603.51 

606.55 

2000 

609.60 

612.65 

615.70 

618.75 

621.79 

624.84 

627.89 

630.94 

633.99 

637.03 

2IOO 

640.08 

643.13 

646.18 

649.23 

652.27 

655.32 

658.37 

661.42 

664.47 

667.51 

22OO 

670.56 

673.61 

676.66 

679.71 

682.75 

685-80 

688.85 

691.90 

694.95 

697.99 

2300 

701.04 

704.09 

707.14 

710.19 

713-23 

716.28 

7I9-33 

722.38 

72543 

728.47 

2400 

73L52 

734-57 

737-62 

740.67 

743-71 

746.76 

749.81 

752.86 

755.91 

758.95 

2500 

762.00 

765-05 

768.10 

77LI5 

774-19 

777.24 

780.29 

783.34 

786.39 

78943 

2600 

792.48 

795-53 

798.58 

801.63 

804.67 

807.72 

810.77 

813.82 

816.87 

819.91 

2700 

822.96 

826.01 

829.06 

832.11 

835.15 

838.20 

841.25 

844-30 

847.35 

850.39 

2800 

853.44 

856.49 

859.54 

862.59 

865.63 

868.68 

871-73 

874.78 

877.83 

880.87 

2900 

883.92 

886.97 

890.02 

893.07 

896.11 

899.16 

902.21 

905.26 

908.31 

9II-35 

3000 

914.40 

917.45 

920.50 

923.55 

926.59 

929.64 

932.69 

935.74 

938.79 

941.83 

3100 

944-88 

947-93 

950.98 

954-03 

957.07 

960.12 

963.17 

966.22 

969.27 

972.31 

3200 

975.36 

978.41 

981.46 

984.51 

987.55 

990.60 

993-65 

996.70 

999.75 

1002.79 

33oo 

1005.84 

1008.89 

1011.94 

1014.99 

1018.03 

1021.08 

1024.13 

1027.18 

1030.23 

1033-27 

3400 

1036.32 

1039.37 

1042.42 

1045.47 

1048.51 

1051.56 

1054.61 

1057.66 

1060.71 

1063.75 

3500 

1066.80 

1069.85 

1072.90 

1075.95 

1078.99 

1082.04 

1085.09 

1088.14 

1091.19 

1094.23 

3600 

1097.28 

1100.33 

1103.38 

1106.43 

1109.47 

1112.52 

HI5-57 

1118.62 

1121.67 

1124.71 

3700 

1127.76 

1130.81 

1133.86 

1136.91 

II39-95 

1143.00 

1146.05 

1149.10 

1152.15 

II55-I9 

3800 

1158.24 

1161.29 

1164.34 

1167.39 

1170.43 

1173.48 

1176-53 

H79.58 

1182.63 

1185.67 

3900 

1188.72 

1191.77 

1194.82 

1197.87 

1200.91 

1203.96 

1207.01 

1210.06 

1213.11 

1216.15 

4000 

1219.20 

1222.25 

1225.30 

1228.35 

1231.39 

123444 

1237.49 

1240.54 

1243-59 

1246.63 

SMITHSONIAN  TABLES. 


200 


TABLE  66. 


FEET    INTO    METRES. 

i  foot  =  0.3048006  metre. 


Feet. 

0 

10 

20 

30 

40 

50 

60 

70 

80 

90 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

tn. 

4000 

1219.2 

1222.3 

1225.3 

1228.3 

1231.4 

1234.4 

1237-5 

1240.5 

1243.6 

1246.6 

4100 

1249.7 

1252.7 

1255.8 

1258.8 

1261.9 

1264.9 

1268.0 

1271.0 

1274.1 

1277.1 

4200 

1280.2 

1283.2 

1286.3 

1289.3 

1292.4 

1295.4 

1298.5 

I30L5 

1304.5 

1307.6 

4300 

I3I0.6 

I3I3.7 

1316.7 

1319.8 

1322.8 

1325.9 

1328.9 

1332.0 

1335.0 

I338.I 

4400 

I34I.I 

1344.2 

1347.2 

1350.3 

1353-3 

1356.4 

13594 

1362.5 

1365.5 

1368.6 

4500 

I37L6 

1374.7 

1377.7 

1380.7 

1383.8 

1386.8 

1389.9 

I392.Q 

1396.0 

1399.0 

4600 

1402.  1 

1405.1 

1408.2 

I4II.2 

I4I4.3 

I4I7.3 

1420.4 

1423.4 

1426.5 

1429.5 

4700 

1432.6 

1435-6 

1438.7 

1441.7 

1444.8 

1447.8 

1450.9 

J453-9 

1456.9 

1460.0 

4800 

1463.0 

1466.1 

1469.1 

1472.2 

1475.2 

1478.3 

1481.3 

1484.4 

1487.4 

1490.5 

4900 

1493-5 

1496.6 

1499.6 

1502.7 

1505.7 

1508.8 

I5II.8 

I5I4.9 

I5I7.9 

I52I.O 

5000 

1524.0 

1527.1 

I530.I 

I533-I 

1536.2 

1539.2 

1542.3 

1545-3 

1548.4 

I55I.4 

5100 

1554-5 

1557.5 

1560.6 

1563-6 

1566.7 

1569-7 

1572.8 

1575.8 

1578.9 

1581.9 

5200 

1585.0 

1588.0 

1591.1 

I594-I 

1597.2 

1600.2 

1603.3 

1606.3 

1609.3 

1612.4 

53°° 

1615.4 

1618.5 

1621.5 

1624.6 

1627.6 

1630.7 

1633.7 

1636.8 

1639.8 

1642.9 

5400 

1645.9 

1649.0 

1652.0 

I655.I 

1658.1 

1661.2 

1664.2 

1667.3 

1670.3 

1673.4 

5500 

1676.4 

1679-5 

1682.5 

1685.5 

1688.6 

1691.6 

1694.7 

1697.7 

1700.8 

1703.8 

5600 

1706.9 

1709.9 

1713.0 

1716.0 

1719.1 

1722.1 

1725.2 

1728.2 

I73L3 

1734-3 

5700 

1737.4 

1740.4 

1743.5 

1746.5 

1749.6 

1752.6 

1755.7 

1758.7 

1761.7 

1764.8 

5800 

1767.8 

1770.9 

1773.9 

1777.0 

1780.0 

1783.1 

1786.1 

1789.2 

1792.2 

1795.3 

5900 

1798.3 

1801.4 

1804.4 

1807.5 

1810.5 

1813.6 

1816.6 

1819.7 

1822.7 

1825.8 

6000 

1828.8 

1831.9 

1834.9 

1837.9 

1841.0 

1844.0 

1847.1 

1850.1 

1853.2 

1856.2 

6100 

1859.3 

1862.3 

1865.4 

1868.4 

1871.5 

1874-5 

1877.6 

1880.6 

1883.7 

1886.7 

6200 

1889.8 

1892.8 

1895.9 

1898.9 

1902.0 

1905.0 

1908.  i 

1911.1 

1914.1 

1917.2 

6300 

1920.2 

1923.3 

1926.3 

1929.4 

1932.4 

1935.5 

1938.5 

1941.6 

1944.6 

1947.7 

6400 

1950.7 

1953.8 

1956.8 

1959.9 

1962.9 

1966.0 

1969.0 

1972.1 

I975.I 

1978.2 

6500 

1981.2 

1984.3 

1987.3 

1990.3 

1993.4 

1996.4 

1999-5 

2002.5 

2005.6 

2008.6 

6600 

20II.7 

2014.7 

2017.8 

2O2O.8 

2023.9 

2026.9 

2030.0 

2033.0 

2036.  1 

2039.1 

6700 

2042.2 

2045.2 

2048.3 

2051.3 

2054.4 

2057.4 

2060.5 

2063.5 

2066.5 

2069.6 

6800 

2072.6 

2075-7 

2078.7 

2081.8 

2084.8 

2087.9 

2090.9 

2094.0 

2097.0 

2  100.  1 

6900 

2103.1 

2  106.2 

2109.2 

2II2.3 

2H5.3 

2118.4 

2121.4 

2124.5 

2127.5 

2130.6 

7000 

2133-6 

2136.7 

2139.7 

2142.7 

2145.8 

2148.8 

2151.9 

2154-9 

2158.0 

2161.0 

7100 

2164.1 

2167.1 

2170.2 

2173.2 

2176.3 

2179.3 

2182.4 

2185.4 

2188.5 

2I9I.5 

7200 

2194.6 

2197.6 

2200.7 

2203.7 

2206.8 

2209.8 

2212.9 

2215.9 

2218.9 

2222.  0 

7300 

2225.0 

2228.1 

2231.1 

2234.2 

2237.2 

2240.3 

2243-3 

2246.4 

2249.4 

2252.5 

7400 

2255.5 

2258.6 

2261.6 

2264.7 

2267.7 

2270.8 

2273.8 

2276.9 

2279.9 

2283.0 

7500 

2286.0 

2289.  1 

2292.1 

2295.1 

2298.2 

2301.2 

2304.3 

2307.3 

2310.4 

23134 

7600 

2316.5 

23I9.5 

2322.6 

2325.6 

2328.7 

233L7 

2334-8 

2337.8 

2340.9 

2343.9 

7700 

2347.0 

2350.0 

2353.1 

2356.1 

2359.2 

2362.2 

2365-3 

2368.3 

237L3 

2374.4 

7800 

2377.4 

2380.5 

2383.5 

2386.6 

2389.6 

2392.7 

2395.7 

2398.8 

2401.8 

2404.9 

7900 

2407.9 

24II.O 

2414.0 

24I7.I 

2420.  1 

2423.2 

2426.2 

2429.3 

2432.3 

2435.4 

8000 

2438.4 

2441.5 

2444.5 

2447-5 

2450.6 

2453.6 

2456.7 

2459-7 

2462.8 

2465.8 

8100 

2468.9 

2471.9 

2475.0 

2478.0 

2481.1 

2484.  i 

2487.2 

2490.2 

2493.3 

2496.3 

8200 

2499.4 

2502.4 

2505.5 

2508.5 

2511.6 

2514-6 

2517.7 

2520.7 

2523.7 

2526.8 

8300 

2529.8 

2532.9 

2535-9 

2539.0 

2542.0 

2545-1 

2548.1 

255L2 

2554.2 

2557-3 

8400 

2560.3 

2563.4 

2566.4 

2569.5 

2572.5 

2575-6 

2578.6 

2581.7 

2584.7 

2587.8 

8500 

2590.8 

2593-9 

2596.9 

2599-9 

2603.0 

2606.0 

2609.  i 

2612.1 

2615.2 

26l8.2 

8600 

2621.3 

2624.3 

2627.4 

2630.4 

2633.5 

2636.5 

2639.6 

2642.6 

2645.7 

2648.7 

8700 

2651.8 

2654.8 

2657.9 

2660.9 

2664.0 

2667.0 

2670.  i 

2673.1 

2676.1 

2679.2 

8800 

2682.2 

2685.3 

2688.3 

2691.4 

2694.4 

2697.5 

2700.5 

2703.6 

2706.6 

2709.7 

8900 

2712.7 

2715.8 

2718.8 

2721.9 

2724.9 

2728.0 

2731.0 

2734.1 

2737.1 

2740.2 

9000 

2743.2 

2746.3 

2749-3 

2752.3 

2755-4 

2758.4 

2761.5 

2764.5 

2767.6 

2770.6 

SMITHSONIAN  TABLES. 


201 


TABLE  67. 


METRES    INTO    FEET. 

i  metre  =  39.3700  inches  =  3.280833  feet 


Metres. 

0 

1 

2 

3 

4 

5 

6 

7 

8 

9 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

0 

0.00 

3.28 

6.56 

9.84 

13.12 

16.40 

19.68 

22.97 

26.25 

29-53 

10 

32.81 

36-09 

39-37 

42.65 

45-93 

49.21 

52.49 

55-77 

59.05 

62.34 

20 

65-62 

68.90 

72.18 

75-46 

78.74 

82.02 

85.30 

88.58 

91.86 

95-14 

30 

98.42 

101.71 

104.99 

108.27 

111-55 

114.83 

u8.il 

121.39 

124.67 

127.95 

40 

131-23 

134.51 

137-79 

141.08 

144.36 

147.64 

150.92 

154.20 

15748 

160.76 

50 

164.04 

167.32 

170.60 

173.88 

177.16 

180.45 

183-73 

187.01 

190.29 

193-57 

60 

196-85 

200.13 

203.41 

206.69 

209.97 

213.25 

216.53 

219.82 

223.10 

226.38 

70 

229.66 

232.94 

236.22 

239-50 

242.78 

246.06 

249-34 

252.62 

255.90 

259.19 

80 

262.47 

265.75 

269.03 

272.31 

275.59 

278.87 

282.15 

285-43 

288.71 

291.99 

90 

295.27 

298.56 

301.84 

305.12 

308.40 

311.68 

314.96 

318.24 

321.52 

324.80 

100 

328.08 

331.36 

334-64 

337-93 

341.21 

344-49 

347-77 

351.05 

354-33 

357.61 

no 

36o.89 

364.17 

36745 

370.73 

374-01 

377-30 

380.58 

383-86 

387-14 

390.42 

120 

393-70 

396.98 

400.26 

403.54 

406.82 

410.10 

413.38 

416.67 

419.95 

423.23 

130 

426.51 

429.79 

433-07 

436.35 

439.63 

442.91 

446.19 

449-47 

452-75 

456.04 

140 

459-32 

462.60 

465.88 

469.16 

472.44 

475-72 

479.00 

482.28 

485.56 

488.84 

150 

492.12 

495-41 

498.69 

501.97 

505-25 

508.53 

511.81 

515-09 

518.37 

521.65 

160 

524.93 

528.21 

53149 

534.78 

538.o6 

541-34 

544-62 

547.90 

55i.i8 

554.46 

170 

557-74 

561.02 

564.30 

567.58 

570.86 

574.15 

577-43 

580.71 

583-99 

587.27 

180 

590-55 

593.83 

597-11 

600.39 

603.67 

606.95 

610.23 

613-52 

616.80 

620.08 

190 

623.36 

626.64 

629.92 

633.20 

636.48 

639.76 

643.04 

646.32 

649.60 

652.89 

200 

656.17 

65945 

662.73 

666.01 

669.29 

672.57 

675.85 

679.13 

682.41 

685.69 

2IO 

688.97 

692.26 

695.54 

698.82 

702.10 

705-38 

708.66 

711.94 

715.22 

718.50 

220 

721.78 

725.06 

728.34 

731.63 

734-91 

738.19 

741.47 

744-75 

748.03 

75L3I 

230 

754-59 

757.87 

761.15 

764-43 

767.71 

771.00 

774-28 

777-56 

780.84 

784.12 

240 

787.40 

790.68 

793.96 

797-24 

800.52 

803.80 

807.08 

810.37 

813-65 

816.93 

250 

820.21 

823.49 

826.77 

830.05 

833.33 

836.61 

839.89 

843.17 

846.45 

849.74 

260 

853.02 

856.30 

859.58 

862.86 

866.14 

869.42 

872.70 

875.98 

879.26 

882.54 

270 

885.82 

889.11 

892.39 

895.67 

898.95 

902.23 

905-51 

908.79 

912.07 

9I5-35 

280 

918.63 

921.91 

925.19 

928.48 

93L76 

935-04 

938.32 

941.60 

944-88 

948.16 

290 

951-44 

954-72 

958.00 

961.28 

964.56 

967.85 

97I.I3 

97441 

977.69 

980.97 

300 

984.25 

987.53 

990.81 

994-09 

997-37 

1000.65 

1003.93 

1007.22 

1010.50 

1013.78 

310 

1017.06 

1020.34 

1023.62 

1026.90 

1030.18 

1033.46 

1036.74 

1040.02 

1043.30 

1046.59 

320 

1049.87 

1053.15 

1056.43 

1059.71 

1062.99 

1066.27 

1069.55 

1072.83 

1076.11 

1079.39 

330 

082.67 

1085.96 

1089.24 

1092.52 

1095.80 

1099.08 

1102.36 

1105.64 

1109.92 

1112.20 

340 

111548 

1118.76 

1122.04 

1125.33 

1128.61 

1131-89 

H35.I7 

H38.45 

1141.73 

1145.01 

350 

1148.29 

II5L57 

1154-85 

1158.13 

1161.41 

1164.70 

1167.98 

1171.26 

1174-54 

1177.82 

360 

1181.10 

1184.38 

1187.66 

1190.94 

1194.22 

1197.50 

1200.78 

1204.07 

1207.35 

1210.63 

370 

1213.91 

1217.19 

1220.47 

1223.75 

1227.03 

1230.31 

1233-59 

1236.87 

1240.15 

124344 

380 

1246.72 

1250.00 

1253.28 

1256.56 

1259.84 

1263.12 

1266.40 

1269,68 

1272.96 

1276.24 

390 

1279.52 

1282.81 

1286.09 

1289.37 

1292.65 

1295-93 

1299.21 

1302.49 

1305.77 

1309.05 

400 

1312.33 

I3I5.6I 

1318.89 

1322.18 

1325.46 

1328.74 

1332.02 

1335.30 

1338.58 

1341.86 

410 

I345-T4 

1348.42 

I35L70 

1354.98 

1358.26 

1361-55 

1364.83 

1368.11 

I37L39 

1374.67 

420 

1377-95 

1381.23 

1384-51 

1387.79 

1391.07 

1394-35 

1397-63 

1400.92 

1404.20 

140748 

430 

1410.76 

1414.04 

1417.32 

1420.60 

1423.88 

1427.16 

1430.44 

143372 

1437.00 

1440.29 

440 

1443-57 

1446.85 

1450.13 

I453-4I 

1456.69 

1459-97 

1463.25 

1466.53 

1469.81 

1473.09 

450 

1476.37 

1479.66 

1482.94 

1486.22 

1489.50 

1492.78 

1496.06 

1499-34 

1502.62 

1505.90 

460 

1509.18 

1512.46 

I5I5.74 

1519-03 

1522.31 

1525-59 

1528.87 

1532.15 

1535-43 

1538.71 

470 

1541.99 

1545.27 

1548.55 

1551-83 

I555-H 

1558.40 

1561.68 

1564.96 

1568.24 

I57I-52 

480 

i574.8o 

1578.08 

1581.36 

1584-64 

1587.92 

1591.20 

1594.48 

1597-77 

1601.05 

1604.33 

490 

1607.61 

1610.89 

1614.17 

1617.45 

1620.73 

1624.01 

1627.29 

1630.57 

1633-85 

1637.14 

500 

1640.42 

1643-70 

1646.98 

1650.26 

1653-54 

1656.82 

1660.10 

1663.38 

1666.66 

1669.94 

SMITHSONIAN  TABLES. 


2O2 


METRES    INTO    FEET. 

i  metre  =  39.3700  inches  =  3.280833  feet 


TABLE   67. 


Metres. 

0 

10 

20 

30 

40 

50 

60 

70 

80 

90 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

500 

1640.4 

1673.2 

1706.0 

1738.8 

I77I.6 

1804.5 

1837.3 

1870.1 

1902.9 

1935.7 

600 

1968.5 

2001.3 

2034.1 

2066.9 

2099.7 

2T32.5 

2165.3 

2198.2 

2231.0 

2263.8 

700 

2296.6 

2329.4 

2362.2 

2395.0 

2427.8 

2460.6 

2493-4 

2526.2 

2559-0 

259I.9| 

800 

2624.7 

2657-5 

2690.3 

2723.1 

2755-9 

2788.7 

2821.5 

2854.3 

2887.1 

2919.9 

900 

2952.7 

2985.6 

3018.4 

305L2 

3084.0 

3II6.8 

3149.6 

3182.4 

3215.2 

3248.0 

1000 

3280.8 

33I3-6 

3346.4 

3379-3 

34I2.I 

3444-9 

3477-7 

3510.5 

3543-3 

3576.1 

1  100 

3608.9 

3641.7 

3674.5 

3707.3 

3740.1 

3773-0 

3805.8 

3838.6 

3871-4 

3904.2 

1  200 

3937-0 

3969.8 

4002.6 

40354 

4068.2 

4101.0 

4133.8 

4166.7 

4I99-5 

4232.3 

1300 

4265.1 

4297.9 

4330-7 

4363.5 

4396.3 

4429.1 

4461.9 

4494-7 

4527-5 

4560.4 

1400 

4593-2 

4626.0 

4658.8 

4691.6 

4724.4 

4757-2 

4790.0 

4822.8 

4855.6 

4888.4 

1500 

4921.2 

4954-1 

4986.9 

5019-7 

5052.5 

5085.3 

5118.1 

5150.9 

5183-7 

-5216.5 

1600 

5249-3 

5282.1 

5314.9 

5347-8 

5380.6 

54134 

5446.2 

5479-0 

55H.8 

5544-6 

1700 

55774 

5610.2 

5643.0 

5675.8 

5708.6 

574L5 

5774-3 

5807.1 

5839-9 

5872.7 

1800 

5905.5 

5938.3 

597I-I 

6003.9 

6036.7 

6069.5 

6102.3 

6135-2 

6  1  68.0 

6200.8 

1900 

6233.6 

6266.4 

6299.2 

6332.0 

6364.8 

6397-6 

6430.4 

6463.2 

6496.0 

6528.9 

2000 

6561.7 

6594.5 

6627.3 

6660.1 

6692.9 

6725-7 

6758.5 

6791.3 

6824.1 

6856.9 

2100 

6889.7 

6922.6 

69554 

6988.2 

7021.0 

7053.8 

7086.6 

7119.4 

7152.2 

7185.0 

2200 

7217.8 

7250.6 

7283.4 

7316.3 

7349-1 

738i.9 

74M.7 

7447-5 

7480.3 

75I3.1 

23OO 

7545-9 

7578.7 

7611.5 

7644-3 

7677.1 

7710.0 

7742.8 

7775-6 

7808.4 

7841.2 

24OO 

7874.0 

7906.8 

7939.6 

7972.4 

8005.2 

8038.0 

8070.8 

8103.7 

8136.5 

8169.3 

2500 

8202.1 

8234.9 

8267.7 

8300.5 

8333.3 

8366.1 

8398.9 

843L7 

8464.5 

8497.4 

2600 

8530.2 

8563.0 

8595.8 

8628.6 

8661.4 

8694.2 

8727.0 

8759.8 

8792.6 

8825.4 

2700 

8858.2 

8891.1 

8923.9 

8956.7 

8989.5 

9022.3 

9055.1 

9087.9 

9120.7 

9!53-5 

2800 

9186.3 

9219.1 

925L9 

9284.8 

9317.6 

9350-4 

9383.2 

9416.6 

9448.8 

9481.6 

2900 

95144 

9547-2 

9580.0 

9612.8 

9645.6 

9678.5 

97II-3 

9744-1 

9776.9 

9809.7 

3000 

9842.5 

9875.3 

9908.1 

9940.9 

9973-7 

10006.5 

10039.3 

10072.2 

10105.0 

10137.8 

3100 

10170.6 

10203.4 

10236.2 

10269.0 

10301.8 

10334.6 

10367.4 

10400.2 

10433.0 

10465.9 

3200 

10498.7 

1053^-5 

10564.3 

10597.1 

10629.9 

10662.7 

10695.5 

10728.3 

10761.1 

10793.9 

33oo 

10826.7 

10859.6 

10892.4 

10925.2 

10958.0 

10990.8 

11023.6 

11056.4 

11089.2 

III22.O 

3400 

IH54-8 

11187.6 

II220.4 

11253.3 

11286.1 

11318.9 

H35I.7 

11384.5 

II4I7.3 

II450.I 

3500 

11482.9 

H5T5.7 

H548.5 

11581.3 

11614.1 

1  1647.0 

11679.8 

11712.6 

II7454 

II778.2 

3600 

H  Sll.O 

11843.8 

11876.6 

11909.4 

11942.2 

11975.0 

12007.8 

12040.7 

12073.5 

I2I06.3 

3700 

12139.1 

12171.9 

12204.7 

12237.5 

12270.3 

12303.1 

12335-9 

12368.7 

12401.5 

12434.4 

3800 

12467.2 

12500.0 

12532.8 

12565.6 

12598.4 

12631.2 

12664.0 

12696.8 

12729.6 

12762.4 

3900 

12795.2 

12828.1 

12860.9 

12893.7 

12926.5 

12959.3 

12992.1 

13024.9 

13057.7 

13090.5 

4000 

13123.3 

13156.1 

13188.9 

13221.8 

13254.6 

13287.4 

13320.2 

13353.0 

13385-8 

I34I8.6 

4100 

I345I.4 

13484.2 

I35I7.0 

13549.8 

13582.6 

13615-5 

13648.3 

13681.1 

I37I3.9 

13746.7 

4200 

13779-5 

13812.3 

I3845.I 

13877.9 

13910.7 

13943-5 

13976.3 

14009.2 

14042.0 

14074.8 

4300 

14107.6 

14140.4 

14173.2 

14206.0 

14238.8 

14271.6 

14304.4 

14337-2 

14370.0 

I44O2.9 

4400 

14435.7 

14468.5 

H50I.3 

I4534-I 

14566.9 

145997 

14632.5 

14665.3 

14698.1 

14730.9 

4500 

14763-7 

14796.6 

14829.4 

14862.2 

14895.0 

14927.8 

14960.6 

14993-4 

15026.2 

15059.0 

4600 

15091.8 

15124.6 

I5I574 

15190-3 

15223.1 

15255-9 

15288.7 

15321.5 

I5354-3 

I5387.I 

4700 

15419.9 

15452.7 

I5485.5 

15518.3 

I555LI 

15584.0 

15616.8 

15649.6 

15682.4 

I57I5.2 

4800 

15748.0 

15780.8 

15813.6 

15846.4 

15879.2 

15912.0 

15944.8 

15977-7 

16010.5 

16043.3 

4900 

16076.1 

16108.9 

16141.7 

16174.5 

16207.3 

16240.1 

16272.9 

16305.7 

16338.5 

16371.4 

5000 

16404.2 

16437.0 

16469.8 

16502.6 

i65354 

16568.2 

1  6601.  o 

16633.8 

16666.6 

16699.4 

Tenths  of  a  metre.          o.i         0.2         0.3         0.4         0.5         0.6         0.7         0.8         0.9 

Feet.                             0.328     0.656     0.984      1.312      1.640      1.968      2.297     2.625      2.953 

SMITHSONIAN  TABLES. 


203 


TABLE  68. 


MILES    INTO    KILOMETRES. 

i  mile  =  1.609347  kilometres 


Miles. 

0 

1 

2 

3 

4 

5 

6 

7 

8 

9 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

0 

0 

2 

3 

5 

6 

8 

10 

II 

13 

14 

10 

16 

18 

19 

21 

23 

24 

26 

27 

29 

31 

20 

32 

34 

35 

37 

39 

40 

42 

43 

45 

47 

30 

48 

50 

5i 

53 

55 

56 

58 

60 

61 

63 

40 

64 

66 

68 

69 

7i 

72 

74 

76 

77 

79 

50 

80 

82 

84 

85 

87 

89 

90 

92 

93 

95 

60 

97 

98 

100 

IOI 

103 

105 

106 

108 

109 

in 

70 

H3 

114 

116 

117 

119 

121 

122 

124 

126 

127 

80 

129 

130 

132 

134 

135 

137 

138 

140 

142 

143 

90 

145 

146 

148 

150 

151 

153 

154 

156 

158 

159 

100 

161 

163 

164 

166 

167 

I69 

171 

172 

174 

175 

no 

177 

179 

180 

182 

183 

I85 

I87 

188 

190 

192 

120 

193 

195 

196 

198 

200 

201 

203 

204 

206 

208 

130 

209 

211 

212 

214 

216 

217 

2I9 

220 

222 

224 

140 

225 

227 

229 

230 

232 

233 

235 

237 

238 

240 

150 

241 

243 

245 

246 

248 

249 

251 

253 

254 

256 

160 

257 

259 

26l 

262 

264 

266 

267 

269 

27O 

272 

170 

274 

275 

277 

278 

280 

282 

283 

285 

286 

288 

180 

290 

291 

293 

295 

296 

298 

299 

301 

303 

304 

190 

306 

307 

309 

3« 

312 

314 

3J5 

317 

319 

320 

200 

322 

323 

325 

327 

328 

330 

332 

333 

335 

336 

210 

333 

340 

341 

343 

344 

346 

348 

349 

35i 

352 

220 

354 

356 

357 

359 

36o 

362 

364 

365 

367 

369 

230 

370 

372 

373 

375 

377 

378 

380 

^ 

383 

385 

240 

386 

388 

389 

39i 

393 

394 

396 

398 

399 

401 

250 

402 

404 

406 

407 

409 

410 

412 

414 

415 

417 

260 

418 

42O 

422 

423 

425 

426 

428 

430 

43i 

433 

270 

435 

436 

438 

439 

441 

443 

444 

446 

447 

449 

280 

45i 

452 

454 

455 

457 

459 

460 

462 

463 

465 

290 

467 

468 

470 

472 

473 

475 

476 

478 

480 

481 

300 

483 

484 

486 

488 

489 

491 

492 

494 

496 

497 

310 

499 

501 

502 

504 

505 

507 

509 

5io 

512 

513 

320 

515 

517 

5i8 

520 

521 

523 

525 

526 

528 

529 

330 

53i 

533 

534 

536 

538 

539 

54i 

542 

544 

546 

340 

547 

549 

550 

552 

554 

555 

557 

558 

560 

562 

350 

563 

565 

566 

568 

570 

57i 

573 

575 

576 

578 

360 

579 

58i 

583 

584 

586 

587 

589 

591 

592 

594 

37o 

595 

597 

599 

600 

602 

604 

605 

607 

608 

610 

380 

612 

613 

615 

616 

618 

620 

621 

623 

624 

626 

390 

628 

629 

631 

632 

634 

636 

637 

639 

641 

642 

400 

644 

645 

647 

649 

650 

652 

653 

655 

657 

658 

410 

660 

661 

663 

665 

666 

668 

669 

671 

673 

674 

420 

676 

678 

679 

681 

682 

684 

686 

687 

689 

690 

430 

692 

694 

695 

697 

698 

700 

702 

703 

705 

706 

440 

708 

710 

711 

713 

715 

716 

718 

719 

721 

.723 

450 

724 

726 

727 

729 

73i 

732 

734 

735 

737 

739 

460 

740 

742 

744 

745 

747 

748 

750 

752 

753 

755 

470 

756 

758 

760 

761 

763 

764 

766 

768 

769 

771 

480 

772 

774 

776 

778 

779 

78i 

782 

784 

785 

787 

49° 

789 

790 

792 

793 

795 

797 

798 

800 

801 

803 

500 

805 

806 

808 

809 

811 

813 

814 

816 

818 

819 

STO 

821 

822 

824 

826 

827 

829 

830 

832 

834 

835 

520 

837 

838 

840 

842 

843 

845 

847 

848 

850 

851 

530 

853 

855 

856 

858 

859 

861 

863 

864 

866 

867 

540 

869 

871 

872 

874 

875 

877 

879 

880 

882 

884 

550 

885 

887 

888 

890 

892 

893 

895 

896 

898 

900 

SMITHSONIAN  TABLES. 


2O4 


MILES    INTO    KILOMETRES. 


TABLE  68. 


Miles. 

0 

i 

2 

3 

4 

5 

6 

7 

8 

9 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

550 

885 

887 

888 

890 

892 

893 

895 

896 

898 

900 

560 

901 

903 

904 

906 

908 

909 

9II 

9I2 

914 

916 

570 

917 

919 

921 

922 

924 

925 

927 

929 

930 

932 

580 

933 

935 

937 

938 

940 

941 

943 

945 

946 

948 

590 

950 

95i 

953 

954 

956 

958 

959 

961 

962 

964 

600 

966 

967 

969 

970 

972 

974 

975 

977 

978 

980 

610 

982 

983 

985 

987 

988 

99° 

99  1 

993 

995 

996 

620 

998 

999 

IOOI 

1003 

1004 

1006 

1007 

1009 

IOII 

1012 

630 

1014 

1015 

1017 

1019 

1020 

1022 

1024 

1025 

1027 

1028 

640 

1030 

1032 

1033 

1035 

1036 

1038 

1040 

1041 

1043 

1044 

650 

1046 

1048 

1049 

1051 

1053 

1054 

1056 

1057 

1059 

1061 

660 

1062 

1064 

1065 

1067 

1069 

IO7O 

1072 

1073 

1075 

"1077 

670 

1078 

1080 

1081 

1083 

1085 

1086 

1088 

1090 

1091 

1093 

680 

1094 

1096 

1098 

1099 

IIOI 

1  102 

1104 

1106 

1107 

1109 

690 

IIIO 

III2 

1114 

1115 

1117 

1118 

1  120 

1122 

1123 

1125 

700 

1127 

1128 

1130 

1131 

1133 

1135 

1136 

II38 

"39 

TI4I 

710 

H43 

1144 

1146 

1147 

1149 

1151 

1152 

U54 

1156 

1157 

720 

H59 

1160 

1162 

1164 

1165 

1167 

1168 

1170 

1172 

1173 

730 

H75 

1176 

1178 

1180 

1181 

1183 

1184 

1186 

1188 

1189 

740- 

1191 

IJ93 

1194 

1196 

1197 

1199 

1  201 

1202 

1204 

1205 

750 

1207 

1209 

I2IO 

1212 

1213 

1215 

1217 

1218 

1220 

1221 

760 

1223 

1225 

1226 

1228 

1230 

1231 

1233 

1234 

1236 

1238 

770 

1239 

1241 

1242 

1244 

1246 

1247 

1249 

1250 

1252 

1254 

780 

1255 

1257 

1259 

1260 

1262 

1263 

1265 

1267 

1268 

1270 

790 

1271 

1273 

1275 

1276 

1278 

1279 

I28l 

1283 

1284 

1286 

800 

1287 

1289 

1291 

1292 

1294 

1296 

1297 

1299 

1300 

1302 

810 

1304 

1305 

1307 

1308 

1310 

1312 

1313 

1315 

I3l6 

1318 

820 

1320 

1321 

1323 

1324 

1326 

1328 

1329 

1331 

1333 

1334 

830 

1336 

1337 

1339 

1341 

1342 

1344 

1345 

1347 

1349 

1350 

840 

1352 

1353 

1355 

1357 

1358 

1360 

1362 

1363 

1365 

1366 

850 

1368 

1370 

1371 

1373 

1374 

1376 

1378 

1379 

I38l 

1382 

860 

1384 

1386 

1387 

1389 

1390 

1392 

1394 

1395 

1397 

1399 

870 

1400 

1402 

1403 

1405 

1407 

1408 

I4IO 

I4II 

1413 

1415 

880 

1416 

1418 

1419 

1421 

1423 

1424 

1426 

1427 

1429 

1431 

890 

1432 

1434 

I436 

1437 

1439 

1440 

1442 

1444 

1445 

1447 

900 

1448 

1450 

1452 

1453 

1455 

1456 

1458 

1460 

I46l 

1463 

910 

1464 

1466 

1468 

1469 

1471 

1473 

1474 

1476 

1477 

1479 

920 

1481 

1482 

1484 

1485 

1487 

1489 

1490 

1492 

1493 

1495 

930 

1497 

1498 

1500 

1502 

1503 

1505 

1506 

1508 

1510 

IS" 

940 

1513 

1514 

I5l6 

I5l8 

1519 

1521 

1522 

1524 

1526 

1527 

950 

1529 

1530 

1532 

1534 

1535 

1537 

1539 

1540 

1542 

1543 

960 

1545 

1547 

1548 

1550 

i55i 

1553 

1555 

1556 

1558 

1559 

970 

1561 

1563 

1564 

1566 

1567 

1569 

1571 

1572 

1574 

1576 

980 

1577 

1579 

1580 

1582 

1584 

1585 

1587 

1588 

1590 

1592 

990 

1593 

*595 

I596 

1598 

1600 

1601 

1603 

1605 

1606 

1608 

1000 

1609 

1611 

l6l3 

1614 

1616 

1617 

1619 

l62I 

1622 

1624 

Miles.   km.     Miles.    km.     Miles.    km.     Miles. 

km. 

1000   1609    6000   9656   II  000  17703   16000 

25750 

2000   3219    7000  11265   12000  19312   17000 

27359 

3000   4828    8000  12875   13000  20922   18000 

28968 

4000   6437    9000  14484   14000  22531   19000 

30578 

5000   8047   10000  16093   15000  24140   20000 

32187 

SMITHSONIAN  TABLES. 


205 


TABLE  69. 


KILOMETRES    INTO    MILES. 

i  kilometre  =0.621370  mile. 


Kilo- 
metres. 

0 

' 

2 

3 

4 

5 

6 

7 

8 

9 

Miles. 

Miles. 

Miles. 

Miles. 

Miles. 

Miles. 

Miles. 

Miles. 

Miles. 

Miles. 

0 

0.0 

0.6 

1.2 

1-9 

2.5 

3-1 

3-7 

4-3 

5-0 

5-6 

10 

6.2 

6.8 

7.5 

8.1 

8.7 

9-3 

9.9 

10.6 

II.  2 

11.8 

20 

12.4 

13.0 

13.7 

14.3 

14.9 

15-5 

16.2 

16.8 

17.4 

18.0 

30 

18.6 

19-3 

19.9 

20.5 

21.  1 

21.7 

22.4 

23.0 

23-6 

24.2 

40 

24.9 

25.5 

26.1 

26.7 

27.3 

28.0 

28.6 

29.2 

29.8 

30.4 

50 

3i.i 

31.7 

32.3 

32.9 

33-6 

34.2 

34.8 

35.4 

36.0 

36.7 

60 

37-3 

37-9 

38.5 

39-i 

39.8 

40.4 

41.0 

41.6 

42.3 

42.9 

70 

43-5 

44.1 

44-7 

45.4 

46.0 

46.6 

47-2 

47-8 

48.5 

49.1 

80 

49-7 

50.3 

51.0 

51-6 

52.2 

52.8 

53-4 

54-1 

54-7 

55-3 

90 

55-9 

56.5 

57-2 

57.8 

58.4 

59.o 

59.7 

60.3 

60.9 

6i-5 

100 

62.1 

62.8 

634 

64.0 

64.6 

65.2 

65.9 

66.5 

67.1 

67.7 

no 

68.4 

69.0 

69.6 

70.2 

70.8 

71-5 

72.1 

72.7 

73-3 

73-9 

120 

74.6 

75-2 

75-8 

76.4 

77.0 

77.7 

78.3 

78.9 

79-5 

80.2 

130 

80.8 

81.4 

82.0 

82.6 

83-3 

83-9 

84.5 

85.1 

85-7 

86.4 

140 

87.0 

87.6 

88.2 

88.9 

89-5 

90.1 

90.7 

9L3 

92.0 

92.6 

150 

93-2 

93-8 

94-4 

95.i 

95.7 

96.3 

96.9 

97.6 

98.2 

98.8 

160 

99-4 

100.0 

100.7 

101.3 

101.9 

102.5 

103.1 

103.8 

104.4 

105.0 

170 

105.6 

106.3 

106.9 

107.5 

108.1 

108.7 

109.4 

IIO.O 

no.6 

III.  2 

180 

in.  8 

112.5 

113.1 

H3.7 

H4.3 

115.0 

115.6 

116.2 

116.8 

1174 

190 

118.1 

118.7 

H9.3 

119.9 

120.5 

121.  2 

121.  8 

122.4 

123.0 

123.7 

200 

124.3 

124.9 

125.5 

126.1 

126.8 

127.4 

128.0 

128.6 

129.2 

I29.9 

210 

130.5 

131.1 

131-7 

132-4 

133-0 

133.6 

134-2 

134.8 

135-5 

I36.I 

220 

136.7 

137.3 

137.9 

138.6 

139.2 

139-8 

140.4 

141.1 

141.7 

142.3 

230 

142.9 

143.5 

144.2 

144.8 

145-4 

I46.O 

146.6 

147.3 

147.9 

148.5 

240 

I49-I 

149.8 

150.4 

151.0 

151.6 

152.2 

152.9 

153.5 

I54-I 

154-7 

250 

155-3 

156.0 

156.6 

157.2 

157-8 

158.4 

I59-I 

159.7 

160.3 

160.9 

260 

161.6 

162.2 

162.8 

163.4 

164.0 

164.7 

165-3 

165.9 

166.5 

167.1 

270 

167.8 

168.4 

169.0 

169.6 

170.3 

170.9 

I7I.5 

172.1 

172.7 

173.4 

280 

174.0 

174.6 

175.2 

175.8 

176.5 

I77.I 

177.7 

178.3 

179.0 

179.6 

290 

180.2 

180.8 

181.4 

182.1 

182.7 

183.3 

183.9 

184.5 

185.2 

185.8 

300 

186.4 

187.0 

187.7 

188.3 

188.9 

189.5 

190.1 

190.8 

191.4 

192.0 

310 

192.6 

193.2 

193-9 

194.5 

i95.i 

195.7 

196.4 

197.0 

197.6 

198.2 

320 

198.8 

199-5 

200.1 

200.7 

201.3 

201.9 

202.  6 

203.2 

203.8 

204.4 

330 

205.1 

205.7 

206.3 

206.9 

207.5 

208.2 

208.8 

209.4 

2IO.O 

210.6 

340 

211.3 

211.9 

212.5 

213.1 

213.8 

214.4 

215.0 

215.6 

2l6.2 

216.9 

350 

217.5 

218.1 

218.7 

219.3 

22O.O 

2  20.  6 

221.2 

221.8 

222.5 

223.1 

360 

223.7 

224.3 

224.9 

225.6 

226.2 

226.8 

227.4 

228.0 

228.7 

229.3 

370 

229.9 

230.5 

23I.I 

231.8 

232.4 

233.0 

233.6 

234-3 

234.9 

235.5 

380 

236.1 

236.7 

237.4 

238.0 

238.6 

239-2 

239.8 

240.5 

24I.I 

241.7 

390 

242.3 

243.0 

243.6 

244.2 

244.8 

245.4 

246.1 

246.7 

247.3 

247.9 

400 

248.5 

249.2 

249.8 

250.4 

251.0 

25T-7 

252.3 

252.9 

253-5 

254.1 

410 

254-8 

255.4 

256.0 

256.6 

257-2 

257.9 

258.5 

259-  1 

259-7 

260.4 

420 

261.0 

261.6 

262.2 

262.8 

263.5 

264.1 

264.7 

265.3 

265.9 

266.6 

430 

267.2 

267.8 

268.4 

269.1 

269.7 

270.3 

270.9 

271.5 

272.2 

272.8 

440 

2734 

274.0 

274.6 

275.3 

275.9 

276.5 

277.1 

277.8 

278.4 

279.0 

450 

279.6 

280.2 

280.9 

281.5 

282.1 

282.7 

283.3 

284.0 

284.6 

285.2 

460 

285.8 

286.5 

287.1 

287.7 

288.3 

288.9 

289.6 

290.2 

290.8 

291.4 

470 

292.0 

292.7 

293.3 

293-9 

294-5 

295.2 

295-8 

296.4 

297.0 

297.6 

480 

298.3 

298.9 

299.5 

300.1 

300.7 

301.4 

302.0 

302.6 

303-2 

303.8 

490 

304.5 

305.1 

305.7 

306.3 

307.0 

307.6 

308.2 

308.8 

309-4 

310.1 

500 

310.7 

311.3 

3H.9 

312.5 

3I3.2 

313.8 

314.4 

315.0 

315.7 

316.3 

5io 

316.9 

317.5 

3I8.I 

318.8 

3I9-4 

320.0 

320.6 

321.2 

321.9 

322.5 

520 

323-1 

323.7 

324.4 

325.0 

325.6 

326.2 

326.8 

327.5 

328.1 

328.7 

530 

329-3 

329-9 

330.6 

33L2 

331.8 

332.4 

333-1 

333-7 

334-3 

334.9 

540 

335-5 

336.2 

336.8 

337-4 

338.0 

338.6 

339-3 

339-9 

340.5 

341.1 

SMITHSONIAN  TABLES. 


206 


KILOMETRES    INTO    MILES. 


TABLE  69 


Kilo- 
metres. 

0 

1 

2 

3 

4 

5 

6 

7 

8 

9/ 

' 

Miles. 

Miles. 

Miles. 

Miles. 

Miles. 

Miles. 

Miles. 

Miles. 

Mile\ 

Miles. 

550 

341.8 

342.4 

343-0 

343-6 

344.2 

344-9 

345-5 

346.1 

346.7 

347-3 

560 

348.0 

348.6 

349-2 

349-8 

350.5 

351.1 

351-7 

352.3 

35?.9 

353-6 

570 

354-2 

354-8 

355-4 

356.0 

356.7 

357.3 

357.9 

358.5 

359-  2 

359-8 

580 

360.4 

361.0 

361.6 

362.3 

362.9 

363.5 

364.1 

364.7 

365-4 

366.0 

59° 

366.6 

367-2 

367-9 

368.5 

369.1 

369.7 

370.3 

371.0 

371.6 

372.2 

600 

372.8 

373-4 

374-1 

374-7 

375-3 

375-9 

376.6 

377-2 

377-8 

378.4 

610 

379-0 

379-7 

380.3 

380.9 

38i.5 

382.1 

382.8 

383.4 

384.0 

384.6 

620 

385-2 

385-9 

386.5 

387.1 

387.7 

388.4 

389.0 

389.6 

390-2 

390.8 

630 

39L5 

392.1 

392.7 

393-3 

393-9 

394-6 

395.2 

395-8 

396.4 

397-1 

640 

397-7 

398.3 

398.9 

399-5 

400.2 

400.8 

401.4 

402.0 

402.6 

403.3 

650 

403.9 

404.5 

405.1 

405.8 

406.4 

407.0 

407.6 

408.2 

408.9 

409.5 

660 

410.1 

410.7 

4II-3 

412.0 

412.6 

413.2 

413.8 

414.5 

4i5.i 

415.7 

670 

416.3 

416.9 

417.6 

418.2 

418.8 

419.4 

420.0 

420.7 

421.3 

421.9 

680 

422.5 

423-2 

423.8 

424-4 

425.0 

425-6 

426.3 

426.9 

427.5 

428.1 

690 

428.7 

429.4 

430.0 

430.6 

431.2 

431-9 

432.5 

433-1 

433-7 

434-3 

700 

435-0 

435-6 

436.2 

436.8 

437-4 

438.1 

438.7 

439-3 

439-9 

440.6 

710 

441.2 

441.8 

442.4 

443-0 

443-7 

444-3 

444-9 

445-5 

446.1 

446.8 

720 

447-4 

448.0 

448.6 

449-3 

449-9 

450.5 

45I-I 

451-7 

452.4 

453-0 

730  - 

453.6 

454-2 

454-8 

455-5 

456.1 

456.7 

457-3 

457-9 

458.6 

459-2 

740 

459-8 

460.4 

461.1 

461.7 

462.3 

462.9 

463-5 

464.2 

464.8 

465-4 

750 

466.0 

466.6 

467.3 

467.9 

468.5 

469.1 

469.8 

470.4 

471.0 

471.6 

760 

472.2 

472.9 

473.5 

474.1 

474-7 

475-3 

476.0 

476.6 

477-2 

477-8 

770 

478.5 

479.1 

479-7 

480.3 

480.9 

481.6 

482.2 

482.8 

483-4 

484.0 

780 

484.7 

485-3 

485-9 

486.5 

487.2 

487.8 

488.4 

489.0 

489.6 

49°-3 

790 

490.9 

491-  5 

492.1 

492.7 

493-4 

494-0 

494-6 

495-2 

495-9 

496.5 

800 

497-1 

497-7 

498.3 

499.0 

499-6 

500.2 

500.8 

501.4 

502.1 

502.7 

810 

503-3 

503-9 

504.6 

505-2 

505.8 

506.4 

507-0 

507-7 

508.3 

508.9 

820 

509-5 

510.1 

510.8 

5H.4 

512.0 

512.6 

5I3-3 

513.9 

514.5 

515-1 

830 

515-7 

516.4 

5i7.o 

517.6 

518.2 

518.8 

5I9-5 

520.1 

520.7 

521.3 

840 

522.0 

522.6 

523-2 

523-8 

524-4 

525-1 

525-7 

526.3 

526.9 

527.5 

850 

528.2 

528.8 

5294 

53o.o 

530.6 

531-3 

531-9 

532.5 

533-1 

533-8 

860 

534-4 

535.0 

535.6 

536.2 

536.9 

537-5 

538.1 

538.7 

539-3 

54o.o 

870 

540.6 

541.2 

541-8 

542.5 

543.1 

543-7 

544-3 

544-9 

545-6 

546.2 

880 

546.8 

547.4 

548.0 

548.7 

549-3 

549-9 

550.5 

551-2 

551-8 

552.4 

890 

553-0 

553-6 

554-3 

554.9 

555-5 

556.1 

556.7 

557-4 

558.0 

558.6 

900 

559-2 

559-9 

560.5 

561.1 

561.7 

562.3 

563-0 

563-6 

564.2 

564.8 

910 

565-4 

566.1 

566.7 

567-3 

567-9 

568.6 

569.2 

569-8 

570.4 

571-0 

920 

571-7 

572.3 

572.9 

573-5 

574-1 

574-8 

575-4 

576.0 

576.6 

577.3 

930 

577-9 

578.5 

579-1 

579-7 

580.4 

581.0 

581.6 

582.2 

582.8 

583-5 

940 

584.1 

584.7 

585-3 

586.0 

586.6 

587.2 

587.8 

588.4 

589.1 

589.7 

950 

590.3 

590.9 

591-5 

592.2 

592.8 

5934 

594-0 

594-7 

595-3 

595-9 

960 

596.5 

597-1 

597-8 

598.4 

599-o 

599-6 

600.2 

600.9 

601.5 

602.1 

970 

602.7 

603.4 

604.0 

604.6 

605.2 

605.8 

606.5 

607.1 

607.7 

608.3 

980 

608.9 

609.6 

610.2 

610.8 

611.4 

612.0 

612.7 

613-3 

613.9 

614.5 

990 

615.2 

615.8 

616.4 

617.0 

617.6 

618.3 

618.9 

619.5 

620.1 

620.7 

1000 

621.4 

622.0 

622.6 

623.2 

623.9 

624.5 

625.1 

625.7 

626.3 

627.0 

km.          Miles.          km.          Miles.          km.          Miles.          km.           Miles. 

1000      621.4       6000    3728.2      II  000    6835.1       16000      9941.9 

2000     1242.7       7000    4349.6      12000    7456-4      17000    10563.3 

3000     1864.1       8000    4971-0      13000    8077.8      18000    11184.7 

4000    2485.5       9000    5592.3      14000    8699.2       19000    11806.0 

5000    3106.8      10000    6213.7      15000    9320.5      20000    12427.4 

SMITHSONIAN  TABLES. 


207 


TABLE   70. 

INTERCONVERSION    OF    NAUTICAL   AND    STATUTE    MILES. 

i  nautical  mile*  =  6080.27  feet. 


Nautical  Miles. 

Statute  Miles. 

Statute  Miles. 

Nautical  Miles. 

1 

1.1516 

1 

0.8684 

2 

2.3031 

2 

1.7368 

3 

3-4547 

3 

2.6052 

4 

4.6062 

4 

3.4736 

5 

5-7578 

5 

4.3420 

6 

6.9093 

6 

5.2104 

7 

8.0609 

7 

6.0788 

8 

9.2124 

8 

6.9472 

9 

10.3640 

9 

7.8155 

*  As  defined  by  the  United  States  Coast  Survey. 


TABLE   71. 


CONTINENTAL    MEASURES    OF    LENGTH    WITH    THEIR     METRIC    AND 

ENGLISH    EQUIVALENTS. 

The  asterisk  (*)  indicates  that  the  measure  is  obsolete  or  seldom  used. 


Measure. 

Metric  Equivalent. 

English  Equivalent. 

El  ''Netherlands) 

i            metre 

3  2808  feet 

Fathom,  Swedish  —  6  feet  

1.7814       " 

5.8445     " 

Foot  Austrian*                                        .... 

031608     " 

I.  O^7O         U 

old  French* 

O  324.8A       " 

i  0657     " 

Russian                                 

0.10480     " 

i             " 

Rheinlandisch  or  Rhenish  (Prussia*, 
Denmark,  Norway*). 
Swedish*                       

0.31385     " 
0.2060       " 

1.0297     " 
O.Q74I      " 

Spanish*  —  \4  vara 

0.2786       " 

O.QI4O       <( 

*Klafter  Wiener  (Vienna)                 

1.89648     " 

6.2221       " 

*L/ine,  old  French  foot  

0.22558  cm. 

0.0888  inch. 

Mile  Austrian  post*  —  24000  feet 

7.58504  km. 

4.714   statute  miles. 

1.852 

1.1508      "           " 

Swedish  —  36000  feet           

10.69       " 

6.642        "           " 

Norwegian  —  16000  feet            • 

11.2986      " 

7.02          "           " 

Netherlands  (mijl)       

i              " 

0.6214      "           " 

Prussian  (law  of  1868)                     .  .  . 

7.500       " 

4.660        "           " 

Danish  

7.5124      " 

4.6804      "           " 

Palm  Netherlands                          

o.i         metre. 

0.3281  feet. 

*Rode   Danish 

1.7662       " 

12.156      " 

*Ruthe   Prussian,  Norwegian  

3.7662       " 

12.356      " 

Sagene  (Russian)   . 

2.1116       " 

7             " 

*Toise  old  French  —  6  feet 

I  Q4QO          " 

6.1941     " 

*Vara  Spanish  *  ... 

0.8150       " 

2.7424     " 

Mexican                

0.8380         " 

2.72Q1      " 

Werst,  or  versta  (Russian)  =  500  sagene  .  . 

1.0668    km. 

3.500         " 

SMITHSONIAN  TABLES. 


208 


CONVERSION    OF  MEASURES    OF  TIME  AND  ANGLE. 

Arc  into  time TABI^E  72 

Time  into  arc  .................  TABLE  73 

Days  into  decimals  of  a  year  and  angle       .     .     .     .     .     .     .  TABLE  74 

Hours,  minutes  and  seconds  into  decimals  of  a  day  ....  TABLE  75 

Decimals  of  a  day  into  hours,  minutes  and  seconds  ....  TABLE  76 

Minutes  and  seconds  into  decimals  of  an  hour      .     .     .     .     .  TABLE  77 

Mean  time  at  apparent  noon TABLE  78 

Sidereal  time  into  mean  solar  time TABLE  79 

Mean  solar  time  into  sidereal  time  TABLE  80 


209 


TABLE   72. 


ARC    INTO    TIME. 


o 

h.  m. 

0 

h.  m. 

0 

h.  m. 

o 

h.  m. 

0 

h.  m. 

0 

h.  m. 

/ 

m.  s. 

// 

s. 

0 

I 

2 

3 
4 
5 

6 

8 
9 

o   o 

o    4 
o    8 

0  12 

o  16 

0  20 
024 
028 
032 
036 

60 

61 
62 
63 
64 
65 
66 

67 
68 

69 

4  o 
4  4 
4  8 
412 
4  16 
4  20 
424 
428 
432 
436 

120 

121 
122 
123 

124 

125 

126 
127 
128 
129 

8  o 
8  4 
8  8 
812 
8  16 

8  20 

824 
828 
832 
836 

180 

181 

182 

183 
184 
185 
186 

187 
188 
189 

12  0 

12  4 

12  8 
12  12 
12  16 
12  20 
12  24 
12  28 
1232 
12  36 

240 

241 
242 
243 
244 
245 
246 

247 
248 

249 

16  o 
16  4 
16  8 
16  12 
16  16 
16  20 
16  24 
16  28 
1632 
1636 

300 

301 
302 
3°3 
304 
305 
306 
307 
308 

309 

20  0 

20  4 

20  8 
20  12 
20  l6 
20  20 
20  24 
2028 
2032 
2036 

0 

i 

2 

3 
4 
5 
6 

8 
9 

0     0 

o    4 
o    8 

0  12 

o  16 
o  20 
o  24 
028 
032 
036 

0 

i 

2 

3 
4 
5 
6 

8 
9 

o.ooo 
0.067 

0.133 

0.200 
0.267 

0-333 
O.4OO 
0.467 

0.533 
O.6OO 

10 

040 

70 

440 

130 

840 

190 

12  4O 

250 

16  40 

310 

2O  4O 

10 

o  40 

10 

0.667 

ii 

12 

J3 
14 
15 
16 

17 
18 

19 

044 
048 
052 
056 
0 

4 
8 

12 

16 

7i 
72 

73 
74 
75 
76 

77 
78 
79 

444 
448 

452 
456 
5  o 
5  4 
5  8 
512 
5  16 

13* 
132 

133 
134 
135 

136 
137 
138 
139 

844 
848 
852 
856 
9  o 
9  4 
9  8 
9  12 
9  16 

191 
192 

193 
194 
195 

196 
197 
198 
199 

1244 
1248 
1252 
12  56 

13  o 

13  4 
13  8 
13  I2 
13  16 

251 
252 

253 
254 
255 

256 
257 
258 
259 

1644 
1648 
1652 
1656 
17  o 
17  4 
17  8 

17  12 

17  16 

3i* 
312 

313 
3J4 
315 
316 
3*7 
3i8 
319 

2044 
2048 
2052 
2056 
21  0 
21  4 
21  8 
21  12 
21  l6 

ii 

12 

13 
14 

15 

16 

17 
18 

19 

044 
048 
052 
056 

0 

4 
8 

12 

16 

ii 

12 
13 

14 

15 

16 

17 
18 

19 

0-733 
0.800 
0.867 

0-933 
I.OOO 

1.067 

1.133 

1.200 
1.267 

20 

20 

80 

5  20 

140 

9  20 

200 

13  20 

260 

17  20 

320 

21  20 

20 

20 

20 

1-333 

21 
22 
23 

24 

25 

26 
27 
28 
29 

24 
28 

s 

I  40 
i  44 
i  48 
i  52 
156 

Si 
82 
83 
84 
85 
86 

87 
.88 
89 

524 
528 

532 
536 
540 
544 
548 
552 
556 

141 

142 

143 
144 
145 

146 
147 
148 
149 

924 
9  28 
932 
936 
940 
944 
948 
952 
956 

201 
202 
203 
204 

205 

206 
207 
208 
209 

13  24 
13  28 
1332 
1336 
1340 

1344 
1348 
1352 
1356 

261 
262 
263 
264 
265 
266 
267 
268 
269 

17  24 
17  28 
1732 
1736 
1740 
1744 
1748 
1752 
17  56 

321 
322 
323 
324 
325 
326 
327 
328 
329 

21  24 
21  28 
21  32 
21  S6 
21  4O 

21  44 

21  48 
21  52 
21  56 

21 
22 
23 

24 

25 

26 
27 
28 
29 

24 
I  28 
I32 

136 
I  4O 
144 
I  48 
152 
156 

21 
22 

23 

24 

25 

26 

27 
28 

29 

1.400 
1.467 

1-533 
1.  600 
1.667 

1-733 
1.800 
1.867 
1-933 

30 

2     0 

90 

6  o 

150 

10  o 

210 

14  o 

270 

18  o 

330 

22  O 

30 

2     0 

30 

2.000 

3i 
32 
33 
34 
35 
36 
37 
38 
39 

2     4 
2     8 
2  12 
2  16 
2  20 
224 
228 
232 
236 

9i 
92 
93 
94 
95 
96 
97 
98 
99 

6  4 
6  8 

6  12 

6  16 

6  20 

6  24 
628 
632 
636 

151 
152 
153 
154 
155 
156 
J57 
158 
159 

10  4 
10  8 

10  12 

10  16 
10  20 

10  24 

1028 
1032 
1036 

211 
212 
213 
214 

215 

216 
217 
218 
219 

14  4 
14  8 

14  12 

14  16 

14  20 
1424 
1428 
1432 
1436 

271 
272 
273 
274 
275 
276 

277 
278 
279 

18  4 
18  8 
18  12 
18  16 
18  20 
18  24 
1828 
1832 
1836 

33  1 
332 
333 
334 
335 
336 
337 
338 
339 

22  4 
22  8 
22  12 
22  l6 
22  20 
22  24 
2228 
22  32 
22  36 

3i 
32 
33 

33£ 
36 
37 
38 
39 

2     4 
2     8 
2  12 
2  16 
2  20 
224 
228 
232 
236 

3i 
32 
33 
34 
35 
36 
37 
38 
39 

2.067 

2.133 

2.200 
2.267 

2-333 
2.400 
2.467 

2-533 
2.600 

40 

2  40 

100 

6  40 

160 

10  40 

220 

1440 

280 

1840 

340 

22  40 

40 

2  40 

40 

2.667 

4i 
42 
43 
44 
45 
46 

47 
48 

49 

244 
2  48 
252 
256 

3    o 
3    4 
3    8 
312 
3i6 

101 
102 
103 

10^ 

105 

106 
107 
108 
109 

644 
648 

652 
656 
7  o 
7  4 
7  8 
7  12 
716 

161 
162 
163 
164 
165 
166 
167 
1  68 
169 

1044 

10  48 

1052 
1056 

II  0 

ii  4 
ii  8 

II  12 

ii  16 

221 
222 
223 
224 

225 

226 
227 
228 
229 

1444 
1448 
1452 
1456 

15  o 

15  4 
15  8 

15  12 

15  16 

281 
282 
283 
284 
285 
286 
287 
288 
289 

1844 
1848 
1852 
1856 
19  o 
19  4 
19  8 

19  12 

19  16 

34i 
342 
343 
344 
345 
346 
347 
348 
349 

2244 
22  48 
22  52 
22  56 

23  o 
23  4 
23  8 
2312 
23  16 

4^ 
42 
43 
44 
45 
46 
47 
48 
49 

244 
248 
252 
256 

3    o 
3    4 
3    8 

3  J2 
316 

4i 
42 
43 
44 
45 
46 
47 
48 
49 

2-733 
2.800 
2.867 

2.933 
3.000 
3.067 

3-133 
3.200 
3-267 

50 

3  20 

NO 

7  20 

170 

II  20 

230 

1520 

290 

19  20 

350 

23  20 

50 

320 

50 

3-333 

5i 
52 
53 
54 
55 
56 
57 
58 
59 

324 
328 
332 
336 
340 

344 
348 
352 
356 

in 

112 
113 

11^ 

115 

116 
117 
118 
119 

7  24 
728 

732 
736 
740 

744 
748 
752 
756 

171 
172 

173 
174 
175 

176 
177 
178 
179 

II  24 
II  28 
II  32 
II  36 

II  40 
ii  44 
1148 
ii  52 
ii  56 

231 
232 
233 
234 
235 
236 
237 
238 
239 

15  24 
1528 
1532 
1536 
i54o 
1544 
1548 
15  52 
15  56 

291 
292 
293 
294 
295 
296 

297 
298 

299 

1924 
19  28 
1932 
1936 
1940 
1944 
1948 
1952 
1956 

35i 
352 
353 
354 
355 
356 
357 
358 
359 

23  24 
2328 

2332 
2336 
2340 

2344 
2348 
2352 

2356 

5i 
52 
53 
54 
55 
56 

11 

59 

324 

3  28 
332 
336 
340 
344 
348 
352 
356 

5i 
52 
53 
54 
55 
56 
57 
58 
59 

3.400 
3-467 
3-533 
3.600 
3.667 

3-733 
3.800 
3.867 
3-933 

60 

4    o 

120 

8  o 

180 

12  0 

240 

16  o 

300 

20  0 

360 

24  o 

60 

4   o 

60 

4.000 

SMITHSONIAN  TABLES. 


210 


TABLE  73. 


TIME    INTO   ARC. 


Hours    into    Arc. 

Time. 

Arc. 

Time. 

Arc. 

Time. 

Arc. 

Time. 

Arc. 

Time. 

Arc. 

Time. 

Arc. 

hrs. 

o 

hrs. 

o 

hrs. 

0 

hrs. 

0 

hrs. 

0 

hrs. 

0 

1 

15 

5 

75 

9 

135 

13 

195 

17 

255 

21 

315 

2 

30 

6 

90 

10 

150 

14 

210 

18 

270 

22 

33° 

3 

45 

7 

105 

M 

165 

15 

225 

19 

285 

23 

345 

4 

60 

8 

120 

12 

180 

16 

240 

20 

300 

24 

360 

Minutes   of  Time    into   Arc. 

Seconds  of  Time    into  Arc. 

m. 

0          / 

m. 

o       / 

m. 

o       / 

s. 

s. 

s. 

, 

O 

15 

21 

5   15 

41 

10   15 

, 

o    15 

21 

5    15 

41 

10   15 

2 

0 

30 

22 

5  30 

42 

10  30 

2 

o    30 

22 

5  30 

42 

10  30 

3 

0 

45 

23 

5  45 

43 

10  45 

3 

o    45 

23 

5  45 

43 

10  45 

4 

I 

o 

24 

6 

0 

44 

ii 

o 

4 

I        0 

24 

6     o 

44 

II       0 

5 

I 

15 

25 

6   15 

45 

ii    15 

5 

i    15 

25 

6   15 

45 

ii    15 

6 

I 

30 

26 

6  3° 

46 

ii  30 

6 

i    30 

26 

6  3° 

46 

ii   30 

7 

I 

45 

27 

6  45 

47 

ii  45 

7 

*    45 

27 

6  45 

47 

ii  45 

8 

2 

0 

28 

7 

0 

48 

12 

0 

8 

2       0 

28 

7     o 

48 

12       0 

9 

2 

15 

29 

7   15 

49 

12    15 

9 

2      15 

29 

7   15 

49 

12    15 

10 

2 

30 

30 

7  30 

50 

12    30 

10 

2     30 

30 

7  30 

50 

12    30 

ii 

2 

45 

31 

7  45 

51 

12  45 

ii 

2     45 

31 

7  45 

51 

12  45 

12 

3 

o 

32 

8 

o 

52 

13 

o 

12 

32 

8     o 

52 

13     o 

13 

3 

15 

33 

8 

15 

53 

13     15 

13 

3    15 

33 

8  15 

53 

13  15 

14 

3 

30 

34 

8  30 

54 

13    30 

14 

3    30 

34 

8  30 

54 

13  30 

15 

3 

45 

35 

8  45 

55 

13  45 

15 

3    45 

35 

8  45 

55 

13  45 

16 

4 

0 

36 

9 

o 

56 

14 

0 

16 

A.       C 

36 

9     o 

56 

14     o 

17 

4 

15 

37 

9 

15 

57 

14  15 

17 

4    15 

37 

9   15 

57 

14  15 

18 

4 

30 

38 

9 

30 

58 

14  30 

18 

4    30 

38 

9  30 

58 

14  30 

19 

4 

45 

39 

9  45 

59 

14  45 

19 

4   45 

39 

9  45 

59 

14  45 

20 

5 

o 

40 

10 

0 

60 

15 

0 

20 

c       c 

40 

10       0 

60 

15     o 

Hundredths   of  a    Second    of  Time  into   Arc. 

Hundredths 
of  a  Sec- 
ond of  Time. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

s. 

0.00 

o.oo 

cTis 

o'.30 

045 

0.60 

o-75 

o.'go 

1.05 

i.  20 

1.35 

.10 

1.50 

1.65 

i.  80 

i-95 

2.IO 

2.25 

2.40 

2-55 

2.70 

2.85 

.20 

3.00 

3.15 

3.30 

345 

3-60 

3.75 

3.90 

4.05 

4.20 

4-35 

•30 

4.50 

4.65 

4.80 

4.95 

5-io 

5-25 

5.40 

5.55 

5-70 

5.85 

.40 

6.00 

6.15 

6.30 

6-45 

6.60 

6.75 

6.90 

7-05 

7.20 

7-35 

0.50 

7-50 

7.65 

7.80 

7-95 

8.10 

8.25 

8.40 

8-55 

8.70 

8.85 

.60 

9.00 

9-15 

9.30 

9-45 

9.60 

9-75 

9.90 

10.05 

10.20 

10.35 

.70 

10.50 

10.65 

10.80 

10.95 

II.  IO 

11.25 

11.40 

11-55 

II.7O 

11.85 

.80 

12.00 

12.15 

12.30 

12.45 

12.60 

12-75 

12.90 

13-05 

13.20 

13-35 

.90 

13.50 

13.65 

13.80 

13.95 

14.10 

14.25 

14.40 

M.55 

14.70 

14.85 

SMITHSONIAN  TABLES. 


211 


TABLE  74. 


DAYS    INTO    DECIMALS    OF  A  YEAR    AND    ANGLE. 


Day 
of 
Year. 

Decimal 
of 
a  Year. 

Angle. 

Day  of  Month. 

Day 
of 
Year. 

Decimal 
of 
a  Year. 

Angle. 

Day  of  Month. 

Common 
Year. 

Bissextile 
Year. 

Common 
Year. 

Bissextile 
Year. 

1 

0.00000 

0°  Ox 

Jan.  i 

Jan.  i 

51 

0.13689 

49°  17' 

Feb.  20 

Feb.  20 

2 

.00274 

o  59 

2 

2 

52 

.13963 

50  16 

21 

21 

3 

.00548 

i  58 

3 

3 

53 

.14237 

51  15 

22 

22 

4 

.00821 

2  57 

4 

4 

54 

.14511 

52  14 

23 

23 

5 

0.01095 

3  57 

5 

5 

55 

o.  14784 

53  13 

24 

24 

6 

.01369 

4  56 

6 

6 

56 

.15058 

54  13 

25 

25 

7 

.01643 

5  55 

7 

7 

57 

.15332 

55  12 

26 

26 

8 

.01916 

6  54 

8 

8 

58 

.15606 

56  ii 

27 

27 

9 

.02190 

7  53 

9 

9 

59 

.15880 

57  10 

28 

28 

10 

0.02464 

8  52 

10 

10 

60 

0.16153 

58  9 

Mar.  i 

29 

ii 

.02738 

9  5i 

ii 

ii 

61 

.16427 

59  8 

2 

Mar.  i 

12 

.03011 

10  51 

12 

12 

62 

.16701 

60  7 

3 

2 

13 

.03285 

ii  50 

13 

13 

63 

.16975 

61  7 

4 

3 

14 

.03559 

12  49 

14 

14 

64 

.17248 

62  6 

5 

4 

15 

0.03833 

13  48 

15 

15 

65 

0.17522 

63  5 

6 

5 

16 

.04107 

14  47 

16 

16 

66 

.17796 

64  4 

7 

6 

17 

.04381 

15  46 

17 

17 

67 

.  18070 

65  3 

8 

7 

18 

.04654 

16  45 

18 

18 

68 

.18344 

66  2 

9 

8 

19 

.04928 

17  44 

19 

19 

69 

.18617 

67  i 

10 

9 

20 

0.05202 

18  44 

20 

20 

70 

0.18891 

68  o 

ii 

10 

21 

.05476 

19  43 

21 

21 

7i 

.19165 

69  o 

12 

ii 

22 

.05749 

20  42 

22 

22 

72 

.19439 

69  59 

13 

12 

23 

.06023 

21  41 

23 

23 

73 

.19713 

7o  58 

14 

13 

24 

.06297 

22  40 

24 

24 

74 

.19986 

7i  57 

15 

14 

25 

0.06571 

23  39 

25 

25 

75 

0.20260 

72  56 

16 

15 

26 

.06845 

24  38 

26 

26 

76 

.20534 

73  55 

17 

16 

27 

.07118 

25  38 

27 

27 

77 

.20808 

74  54 

1  8 

17 

28 

.07392 

26  37 

28 

28 

78 

.21081 

75  54 

19 

18 

29 

.07666 

27  36 

29 

29 

79 

.21355 

76  53 

20 

19 

30 

0.07940 

28  35 

30 

30 

80 

0.21629 

77  52 

21 

20 

31 

.08214 

29  34 

31 

31 

81 

•21903 

78  51 

22 

21 

32 

.08487 

30  33 

Feb.  i 

Feb.  i 

82 

.22177 

79  50 

23 

22 

33 

.08761 

3i  32 

2 

2 

83 

.22450 

80  49 

24 

23 

34 

•09035 

32  32 

3 

3 

84 

.22724 

Si  48 

25 

24 

35 

0.09309 

33  3i 

4 

4 

85 

0.22998 

82  48 

26 

25 

'36 

.09582 

34  30 

5 

5 

86 

.23272 

83  47 

27 

26 

37 

.09856 

35  29 

6 

6 

87 

.23546 

84  46 

28 

27 

38 

.10130 

36  28 

7 

7 

88 

.23819 

85  45 

29 

28 

39 

.10404 

37  27 

8 

8 

89 

.24093 

86  44 

30 

29 

40 

o.  10678 

38  26 

9 

9 

90 

0.24367 

87  43 

31 

30 

4i 

.10951 

39  26 

10 

10 

91 

.24641 

88  42 

Apr.  i 

31 

42 

.11225 

40  25 

ii 

ii 

92 

.24914 

89  42 

2 

Apr.  i 

43 

.11499 

41  24 

12 

12 

93 

.25188 

90  41 

3 

2 

44 

.11773 

42  23 

13 

13 

94 

.25462 

91  40 

4 

3 

45 

0.12047 

43  22 

14 

14 

95 

0.25736 

92  39 

5 

4 

46 

.12320 

44  21 

15 

15 

96 

.26010 

93  38 

6 

5 

47 

.12594 

45  20 

16 

16 

97 

.26283 

94  37 

7 

6 

48 

.12868 

46  19 

17 

17 

98 

.26557 

95  36 

8 

7 

49 

.13142 

47  19 

18 

18 

99 

.26831 

96  35 

9 

8 

50 

0.13415 

48  18 

19 

19 

100 

0.27105 

97  35 

10 

9 

SMITHSONIAN  TABLES. 


212 


TABLE  74. 


DAYS    INTO    DECIMALS    OF  A  YEAR    AND    ANGLE. 


Day 

Decimal 

Day  of 

Month. 

Day 

Decimal 

Day  of 

Month. 

of 
Year. 

of 
a  Year. 

Angle. 

Common 
Year. 

Bissextile 
Year. 

of 
Year. 

of 
a  Year. 

Angle. 

Common 
Year. 

Bissextile 
Year. 

101 

0.27379 

98°34/ 

Apr.  n 

Apr.  10 

151 

0.41068 

147°  5i' 

May  31 

May  30 

102 

.27652 

99  33 

12 

n 

152 

.41342 

148  50 

June  i 

3i 

103 

.27926 

100  32 

13 

12 

153 

.41615 

149  49 

2 

June  i 

104 

.28200 

101  31 

14 

13 

154 

.41889 

150  48 

3 

2 

105 

0.28474 

102  30 

15 

14 

155 

0.42163 

151  47 

4 

3 

106 

.28747 

I03  29 

16 

15 

156 

42437 

152  46 

5 

4 

107 

.29021 

104  29 

17 

16 

157 

.42710 

153  45 

6 

5 

108 

.29295 

105  28 

18 

17 

158 

.42984 

154  45 

7 

6 

109 

.29569 

1  06  27 

J9 

18 

159 

.43258 

155  44 

8 

7 

110 

0.29843 

IO7  26 

20 

19 

160 

0.43532 

156  43 

9 

8 

in 

.30116 

108  25 

21 

20 

161 

.43806 

157  42 

10 

9 

112 

.30390 

109  24 

22 

21 

162 

.44079 

158  41 

n 

10 

H3 

.30664 

no  23 

23 

22 

163 

•44353 

159  40 

12 

n 

114 

•30938 

III  23 

24 

23 

164 

.44627 

160  39 

13 

12 

(15 

0.31211 

112  22 

25 

24 

165 

0.44901 

161  39 

14 

13 

116 

.31485 

113  21 

26 

25 

166 

.45175 

162  38 

15 

14 

117 

.31759 

114  20 

27 

26 

167 

.45448 

163  37 

16 

15 

118 

.32033 

H5  19 

28 

27 

168 

.45722 

164  36 

17 

16 

119 

.32307 

116  18 

29 

28 

169 

.45996 

165  35 

18 

17 

120 

0.32580 

117  17 

30 

29 

170 

0.46270 

166  34 

!9 

18 

121 

•32854 

118  17 

May  i 

30 

171 

•46543 

167  33 

20 

J9 

122 

.33128 

119  16 

2 

May  i 

172 

.46817 

168  33 

21 

20 

123 

•33402 

120  15 

3 

2 

173 

.47091 

169  32 

22 

21 

I24 

.33676 

121  14 

4 

3 

174 

.47365 

170  31 

23 

22 

125 

0-33949 

122  13 

5 

4 

175 

0.47639 

171  30 

24 

23 

126 

.34223 

123  12 

6 

5 

176 

.47912 

172  29 

25 

24 

127 

•34497 

124  II 

7 

6 

177 

.48186 

173  28 

26 

25 

128 

•34771 

125  10 

8 

7 

178 

.48460 

174  27 

27 

26 

129 

.35044 

126  10 

9 

8 

179 

•48734 

175  26 

28 

27 

130 

0.35318 

127  9 

10 

9 

180 

0.49008 

176  26 

29 

28 

131 

•35592 

128  8 

n 

10 

181 

.49281 

177  25 

30 

29 

132 

.35866 

129  7 

12 

n 

182 

•49555 

178  24 

July  i 

30 

133 

.36140 

130  6 

13 

12 

183 

.49829 

179  23 

2 

July  i 

134 

•36413 

131  5 

14 

13 

184 

.50103 

l8o  22 

3 

2 

135 

0.36687 

132  4 

15 

14 

185 

0.50376 

181  21 

4 

3 

136 

.36961 

133  4 

16 

15 

186 

.50650 

182  20 

5 

4 

137 

•37235 

134  3 

17 

16 

187 

.50924 

183  20 

6 

5 

138 

•37509 

135   2 

18 

17 

188 

.51198 

184  19 

7 

6 

139 

.37782 

136  i 

J9 

18 

189 

.51472 

185  18 

8 

7 

140 

0.38056 

137  o 

20 

19 

190 

0.51745 

186  17 

9 

8 

141 

•38330 

137  59 

21 

20 

191 

.52019 

187  16 

10 

9 

142 

.38604 

138  58 

22 

21 

192 

•52293 

188  15 

n 

10 

143 

.38877 

139  58 

23 

22 

193 

.52567 

189  14 

12 

n 

144 

•39*5* 

140  57 

24 

23 

194 

.52841 

190  14 

13 

12 

145 

0.39425 

141  56 

25 

24 

195 

0.53H4 

191  13 

14 

13 

146 

.39699 

142  55 

26 

25 

196 

•53388 

192  12 

15 

14 

147 

•39973 

143  54 

27 

26 

197 

.53662 

193  II 

16 

15 

148 

.40246 

144  53 

28 

27 

198 

.53936 

194  10 

17 

16 

149 

.40520 

145  52 

29 

28 

199 

.54209 

195  9 

18 

17 

150 

0.40794 

146  51 

30 

29 

200 

0.54483 

196  8 

19 

18 

BviTHSor 

IAN  TABLES. 

S~  U1  ^ 

H  «  H  y> 

213 


OF  THE  X 

UNIVERSITY  J 
*-*/ 


TABLE    74. 


DAYS    INTO    DECIMALS    OF  A  YEAR    AND    ANGLE. 


1  

Day 

of 
Year. 

Decimal 
of 
a  Year. 

Angle. 

Day  of  Month. 

Day 

of 
Year. 

Decimal 
of 
a  Year. 

Angle. 

Day  of  Month. 

Common 
Year. 

Bissextile 
Year. 

Common 
Year. 

Bissextile 
Year. 

201 

0-54757 

197°  8' 

Jtdy  20 

July  19 

251 

0.68446 

246°  24' 

Sept.  8 

Sept.  7 

202 

.55031 

198  7 

21 

20 

252 

.68720 

247  24 

9 

8 

203 

.55305 

199  6 

22 

21 

253 

.68994 

248  23 

10 

9 

204 

•55578 

200  5 

23 

22 

254 

.69268 

249  22 

ii 

10 

205 

0.55852 

201  4 

24 

23 

255 

0.69541 

250  21 

12 

ii 

206 

.56126 

202   3 

25 

24 

256 

.69815 

251  20 

13 

12 

207 

.56400 

203   2 

26 

25 

257 

.70089 

252  19 

14 

13 

208 

.56674 

204   I 

27 

26 

258 

.70363 

253  18 

15 

14 

209 

.56947 

205   I 

28 

27 

259 

.70637 

254  17 

16 

15 

210 

0.57221 

206  o 

29 

28 

260 

0.70910 

255  17 

17 

16 

211 

•57495 

206  59 

30 

29 

261 

.71184 

256  16 

18 

17 

212 

.57769 

207  58 

31 

30 

262 

.71458 

257  15 

19 

18 

213 

.58042 

208  57 

Aug.  i 

31 

263 

.71732 

258  14 

20 

*9 

214 

.58316 

209  56 

2 

Aug.  i 

264 

.72005 

259  13 

21 

20 

215 

0.58590 

210  55 

3 

2 

265 

0.72279 

260  12 

22 

21 

216 

.58864 

211  55 

4 

3 

266 

.72553 

26l  II 

23 

22 

217 

•59!3S 

212  54 

5 

4 

267 

.72827 

262  II 

24 

23 

218 

.594H 

213  53 

6 

5 

268 

.73101 

263  10 

25 

24 

219 

.59685 

214  52 

7 

6 

269 

•73374 

264  9 

26 

25 

220 

0-59959 

215  5i 

8 

7 

270 

0.73648 

265  8 

27 

26 

221 

.60233 

216  50 

9 

8 

271 

.73922 

266  7 

28 

27 

222 

.60507 

217  49 

10 

9 

272 

.74196 

267  6 

29 

28 

223 

.60780 

218  49 

ii 

10 

273 

.74470 

268  5 

30 

29 

224 

.61054 

219  48 

12 

ii 

274 

•74743 

269  5 

Oct.  i 

30 

225 

0.61328 

220  47 

13 

12 

275 

0.75017 

270  4 

2 

Oct.  i 

226 

.61602 

221  46 

14 

13 

276 

.75291 

271  3 

3 

2 

227 

.61875 

222  45 

15 

14 

277 

.75565 

272   2 

4 

3 

228 

.62149 

223  44 

16 

15 

278 

.75838 

273   I 

5 

4 

229 

.62423 

224  43 

17 

16 

279 

.76112 

274  o 

6 

5 

230 

0.62697 

225  43 

18 

17 

280 

0.76386 

274  59 

7 

6 

231 

.62971 

226  42 

19 

18 

281 

.76660 

275  59 

8 

7 

232 

.63244 

227  41 

20 

19 

282 

.76934 

276  58 

9 

8 

233 

.63518 

228  40 

21 

20 

283 

.77207 

277  57 

10 

9 

234 

.63792 

229  39 

22 

21 

284 

.77481 

278  56 

ii 

10 

235 

0.64066 

230  38 

23 

22 

285 

0-77755 

279  55 

12 

ii 

236 

.64339 

231  37 

24 

23 

286 

.78029 

280  54 

13 

12 

237 

.64613 

232  36 

25 

24 

287 

.78303 

281  53 

14 

13 

238 

.64887 

233  36 

26 

25 

288 

.78576 

282  52 

15 

14 

239 

.65161 

234  35 

27 

26 

289 

.78850 

283  52 

16 

15 

240 

0.65435 

235  34 

28 

27 

290 

0.79124 

284  51 

17 

16 

241 

.65708 

236  33 

29 

28 

291 

.79398 

285  50 

18 

17 

242 

.65982 

237  32 

30 

29 

292 

.79671 

286  49 

19 

18 

243 

.66256 

238  31 

31 

30 

293 

•79945 

287  48 

20 

19 

244 

.66530 

239  30 

Sept.  i 

31 

294 

.80219 

288  47 

21 

20 

'245 

0.66804 

240  30 

2 

Sept.  i 

295 

0.80493 

289  46 

.  22 

21 

1  246 

•67077 

241  29 

3 

2 

296 

.80767 

290  46 

23 

22 

247 

.67351 

242  28 

4 

3 

297 

.81040 

291  45 

24 

23 

248 

.67625 

243  27 

5 

4 

298 

.81314 

292  44 

25 

24 

249 

.67899 

244  26 

6 

5 

299 

.81588 

293  43 

26 

25 

250 

0.68172 

245  25 

7 

6 

300 

0.81862 

294  42 

27 

26 

SMITHSONIAN  TABLES. 


214 


TABLE   74. 


DAYS    INTO    DECIMALS    OF   A   YEAR    AND   ANGLE. 


Day 
of 
Year. 

Decimal 
of 
a  Year. 

Angle. 

Day  of   Month. 

Day 
of 
Year. 

Decimal 
of 
a  Year. 

Angle. 

Day  of    Month. 

Common 
Year 

Bissextile 
Year. 

Common 
Year. 

Bissextile 
Year. 

301 

0.82136 

295°4i/ 

Oct.  28 

Oct.  27 

351 

0.95825 

344°58/ 

Dec.  17 

Dec.  16 

302 

.82409 

296  40 

29 

28 

352 

.96099 

345  57 

18 

17 

303 
304 

.82683 
.82957 

297  40 
298  39 

30 
31 

29 
30 

353 
354 

.96372 
.96646 

346  56 
347  56 

19 

20 

18 
19 

305 

0.83231 

299  38 

Nov.    i 

31 

355 

0.96920 

348  55 

21 

20 

306 

.83504 

300  37 

2 

Nov.  i 

356 

.97194 

349  54 

22 

21 

307 

.83778 

301  36 

3 

2 

357 

.97467 

350  53 

23 

22 

308 

.84052 

302  35 

4 

3 

358 

.97741 

35i  52 

24 

23 

309 

.84326 

303  34 

5 

4 

359 

.98015 

352  §i 

25 

24 

310 

0.84600 

304  34 

6 

5 

360 

0.98289 

353  50 

26 

25 

311 

•84873 

305  33 

7 

6 

361 

.98563 

354  50 

27 

26 

312 

.85147 

306  32 

8 

7 

362 

.98836 

355  49 

28 

27 

.85421 

307  3i 

9 

8 

363 

.99110 

35648 

29 

28 

314 

.85695 

308  30 

10 

9 

364 

.99384 

357  47 

30 

29 

315 

0.85969 

309  29 

ii 

10 

365 

0.99658 

358  46 

31 

30 

316 

.86242 

310  28 

12 

ii 

366 

.99932 

359  45 

31 

317 

.86516  . 

311  27 

13 

12 

.86790 

312  27 

14 

13 

3*9 

.87064 

313  26 

15 

14 

Conversion  for  Hours. 

Conversion  for  Minutes. 

320 

321 
322 

0.87337 
.87611 
.87885 

314  25 
315  24 
316  23 

16 

17 
18 

15 

16 
17 

Hrs. 

Dec.  of 
Year. 

Angle. 

Min. 

Dec.  of 
Year. 

Angle. 

881^0 

TQ 

18 

324 

.ooi^y 

.88433 

318   21 

20 

19 

1 

O.OOOII 

2.'5 

, 

o.ooooo 

0.04 

325 

0.88706 

319  21 

21 

20 

2 

23 

4-9 

2 

o 

.08 

326 

.88980 

320  20 

22 

21 

3 

34 

7-4 

3 

I 

.12 

327 

.89254 

321    19 

23 

22 

4 

46 

9-9 

4 

I 

.16 

328 
329 

.89528 
.89802 

322  18 

323  17 

24 
25 

23 
24 

5 

6 

0.00057 
68 

12.3 

14.8 

5 

6 

O.OOOOI 

I 

0.21 

.25 

330 

0.90075 

324  16 

26 

25 

7 

80 

17.2 

7 

I 

.29 

33i 

.90349 

325  15 

27 

26 

8 

91 

19.7 

8 

2 

•33 

332 

.90623 

326  15 

28 

27 

9 

103 

22.2 

9 

2 

•37 

333 

.90897 

327  14 

29 

•28 

334 

.91170 

328  13 

30 

29 

10 

0.00114 

24.6 

10 

0.00002 

0.41 

ii 

126 

27.1 

20 

4 

.82 

335 

0.91444 

329   12 

Dec.    i 

30 

12 

137 

29.6 

3° 

6 

1.23 

336 

.91718 

330    II 

2 

Dec.  i 

13 

148 

32.0 

40 

8 

1.64 

337 

.91992 

331  10 

3 

2 

14 

160 

34-5 

50 

10 

2.05 

338 

.92266 

332    9 

4 

3 

339 

.92539 

333    9 

.5 

4 

15 

0.00171 

37-0 

60 

O.OOOII 

2.46 

340 

342 
343 

0.92813 
.93087 
•93361 
•93634 

334    8 
335    7 
336    6 
337    5 

6 

i 

9 

6 

.7 
:8 

16 

17 
18 

19 

183 
194 
205 
217 

39.4  - 
4L9 
44.4 
46.8 

344 

.93908 

338    4 

10 

9 

20 

0.00228 

49-3 

345 

0.94182 

339    3 

ii 

10 

21 

240 

51.7 

346 

347 

.94456 
.94730 

340    2 

34i     2 

12 
13 

ii 

12 

22 
23 

251 
262 

54-2 
56.7 

348 

.95003 

342    i 

14 

13 

24 

274 

59-  I 

349 

•95277 

343    ° 

15 

14 

350 

0.95551 

343  59 

16 

15 

•SMITHSONIAN  TABLES 


215 


TABLE  75. 

HOURS,   MINUTES   AND    SECONDS    INTO    DECIMALS    OF  A    DAY. 


Hours 

Day. 

Min. 

Day. 

Min. 

Day. 

Sec. 

Day. 

Sec. 

Day. 

1 

0.041  667 

, 

o.ooo  694 

31 

0.021  528 

1 

0.000012 

31 

o.ooo  359 

2 

•083  333 

2 

.001  389 

32 

.022  222 

2 

.000023 

32 

.000370 

3 

.125000 

3 

.002  083 

33 

.022  917 

3 

.000035 

33 

.000382 

4 

.166667 

4 

.002  778 

34 

.023611 

4 

.000046 

34 

.000  394 

5 

0.208333 

5 

0.003  472 

35 

0.024  305 

5 

o.ooo  058 

35 

o.ooo  405 

6 

.250000 

6 

.004  167 

36 

.025000 

6 

.000069 

36 

.000417 

7 

.291  667 

7 

.004  86  1 

37 

.025  694 

7 

.000  08  1 

37 

.000428 

8 

•333  333 

8 

.005  556 

38 

.026  389 

8 

.000093 

38 

.000440 

9 

.375000 

9 

.006  250 

39 

.027  083 

9 

.000  104 

39 

.000451 

10 

0.416  667 

10 

0.006  944 

40 

0.027  778 

10 

o.ooo  116 

40 

o.ooo  463 

ii 

458333 

ii 

.007  639 

4i 

.028  472 

ii 

.000  127 

4i 

.000  475 

12 

.500000 

12 

.008  333 

42 

.029  167 

12 

.000139 

42 

.000  486 

13 

.541  667 

13 

.009  028 

43 

.029  86  1 

13 

.000  150 

43 

.000  498 

14 

•583  333 

14 

.009  722 

44 

.030  556 

14 

.000  162 

44 

.000509 

15 

0.625  ooo 

15 

o.oio  417 

45 

0.031  250 

15 

o.ooo  174 

45 

0.000521 

16 

.666  667 

16 

.Oil  III 

46 

.031  944 

16 

.000  185 

46 

.000  532 

17 

.708333 

17 

.on  806 

47 

.032  639 

17 

.000  197 

47 

.000544 

18 

.750  ooo 

18 

.012  500 

48 

•033  333 

18 

.000208 

48 

.000  556 

19 

.791  667 

J9 

.013  194 

49 

.034  028 

19 

.000220 

49 

.000567 

20 

0.833  333 

20 

0.013  889 

50 

0.034  722 

20 

o.ooo  231 

50 

o.ooo  579 

21 

.875000 

21 

.014  583 

5i 

.035  417 

21 

.000243 

5i 

.000590 

22 

.916667 

22 

.015  278 

52 

.036  in 

22 

.000255 

52 

.000602 

23 

.958333 

23 

.015  972 

53 

.036  806 

23 

.000  266 

53 

.000613 

24 

I.OOOOOO 

24 

.016  667 

54 

.037  500 

24 

.000278 

54 

.000  625 

25 

0.017  361 

55 

0.038  194 

25 

o.ooo  289 

55 

o.ooo  637 

26 

.018  056 

56 

.038  889 

26 

.000301 

56 

.000  648 

27 

.018  750 

57 

.039  583 

27 

.000313 

57 

.000660 

28 

.019  444 

58 

.040  278 

28 

.000  324 

58 

.000671 

29 

.020  139 

59 

.040  972 

29 

.000  336 

59 

.000  683 

30 

0.020  833 

60 

0.041  667 

30 

o.ooo  347 

60 

.000694 

TABLE    76. 

DECIMALS    OF   A    DAY    INTO    HOURS,  MINUTES   AND    SECONDS. 


Hundredths  of  a  Day. 

Ten  Thousandths  of  a  Day. 

Millionths  of  a  Day. 

d. 

h.      m.      s. 

d. 

tnin.    sec. 

d. 

sec. 

0.01 

14     24 

0.0001 

8.64 

0.000001 

0.09 

.02 

28     48 

2 

17.28 

2 

0.17 

.03 

43     12 

3 

25.92 

3 

0.26 

.04 

57    36 

4 

34.56 

4 

0-35 

0.05 

I      12        0 

0.0005 

43.20 

0.000005 

0.43 

.06 

I      26      24 

6 

51.84 

6 

0.52 

.07 

I      40      48 

7 

I        0.48 

7 

0.6o 

.08 

i    55     12 

8 

I        9.12 

8 

0.69 

.09 

2      9    36 

9 

I      17.76 

9 

0.78 

0.10 

2      24        0 

0.0010 

I      26.40 

0.000010 

0.86 

.20 

4    48      o 

20 

2      52.80 

20 

1-73 

.30 

7      12        0 

30 

4    19.20 

30 

2-59 

.40 

9    36      o 

40 

5    45.6o 

40 

3-46 

0.50 

12        O        o 

0.0050 

7     12.00 

0.000050 

4-32 

.60 

14    24      o 

60 

8    38.40 

60 

5-18 

.70 

16    48      o 

70 

10      4.80 

7o 

6.05 

.80 

19      12        0 

80 

ii     31.20 

80 

6.91 

.90 

21      36        0 

90 

12      57.60 

90 

7.78 

SMITHSONIAN  TABLES. 


216 


TABLE   77. 
MINUTES   AND    SECONDS    INTO    DECIMALS    OF   AN    HOUR. 


Min. 

Decimals  of 
an  hour. 

Min. 

Decimals  of 
an  hour. 

Sec. 

Decimals  of 
an  hour. 

Sec. 

Decimals  of 
an  hour. 

, 

0.016  667 

31 

0.516667 

, 

o.ooo  278 

31 

0.008  611 

2 

•033  333 

32 

•533  333 

2 

.000  556 

32 

.008  889 

3 

.050  ooo 

33 

.550  ooo 

3 

.000833 

33 

.009  167 

4 

.066  667 

34 

.566  667 

4 

.001  III 

34 

.009444 

5 

0.083  333 

35 

0.583  333 

5 

o.ooi  389 

35 

0.009  722 

6 

.IOO  OCX) 

36 

.600000 

6 

.001  667 

36 

.010  ooo 

7 

.116667 

37 

.616667 

7 

.001  944 

37 

.010  278 

8 

•133  333 

38 

.633  333 

8 

.002  222 

38 

.010  556 

9 

.150  OCK> 

39 

.650000 

9 

.002500 

39 

.010  833 

10 

0.166  667 

40 

0.666  667 

10 

0.002  778 

40 

O.OII  III 

ii 

•183  333 

41 

.683333 

ii 

.003  056 

4i 

.011389 

12 

.200000 

42 

.700000 

12 

.003  333 

42 

.on  667 

13 

.216  667 

43 

.716  667 

13 

.003611 

43 

.oli  944 

14 

•233  333 

44 

•733  333 

14 

.003  889 

44 

.012  222 

15 

0.250  ooo 

45 

0.750  ooo 

15 

0.004  167 

45 

0.012  500 

16 

.266  667 

46 

.766  667 

16 

.004444 

46 

.012  778 

17 

•283  333 

47 

•783  333 

17 

.004  722 

47 

.013  056 

18 

.300000 

48 

.800000 

18 

.005  ooo 

48 

•013  333 

*9 

.316667 

49 

.816667 

19 

.005  278 

49 

.013  611 

20 

0-333  333 

50 

0.833  333 

20 

0.005  556 

50 

0.013  889 

21 

.350000 

5i 

.850000 

21 

.005  833 

5i 

.014  167 

22 

.366667 

52 

.866  667 

22 

.006111 

52 

.014444 

23 

•383  333 

53 

•883  333 

23 

.006  389 

53 

.014  722 

24 

.400000 

54 

.900000 

24 

.006  667 

54 

.015000 

25 

0.416  667 

55 

0.916  667 

25 

0.006  944 

55 

0.015  278 

26 

433  333 

56 

•933  333 

26 

.OO7  222 

56 

•015  556 

27 

.450000 

57 

.950000 

27 

.007500 

57 

.015  833 

28 

.466  667 

58 

.966667 

28 

.007  778 

58 

.016  in 

29 

483  333 

59 

•983  333 

29 

.008  056 

59 

.016  389 

30 

0.500000 

60 

I.OOOOOO 

30 

0.008  333 

60 

0.016  667 

TABLE   78. 


MEAN    TIME    AT   APPARENT    NOON. 


Day  of 
Month. 

JAN. 

FEB. 

MAR. 

APR. 

MAY. 

JUNE. 

h.  m. 

h.  m. 

h.  m. 

h.   m. 

h.  m. 

h.  in. 

I 

12   4 

12  14 

12   12 

12   4 

II  57 

II  58 

8 

12   7 

12   14 

12   II 

12    2 

II  56 

ii  59 

16 

12   10 

12   14 

12   9 

12    0 

ii  56 

12    0 

24 

12   12 

12   13 

12    6 

II   58 

ii  57 

12    2 

JUI,Y. 

AUG. 

SEPT. 

OCT. 

NOV. 

me. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

I 

12   3 

12    6 

12    0 

II  50 

ii  44 

II  50 

8 

12   5 

12   5 

II  58 

II  48 

ii  44 

ii  53 

16 

12    6 

12   4 

II  55 

II  46 

ii  45 

ii  56 

24 

12    6 

12    2 

II  52 

ii  45 

ii  47 

12    0 

SMITHSONIAN  TABLES. 


217 


TABLE  79. 

SIDEREAL   TIME    JNTO    MEAN 
SOLAR    TIME. 

The   tabular  values  are  to  be  subtracted 
from  a  sidereal  time  interval. 


TABLE-SO. 

MEAN    SOLAR    TIME     INTO 
SIDEREAL   TIME. 

The  tabular  values  are  to  be  added  to  a 
mean  solar  time  interval. 


Hrs. 

Reduction 
to 
Mean  Time. 

Min. 

Reduc- 
tion 
to  Mean 
Time. 

Min. 

Reduc- 
tion 
to  Mean 
Time. 

Hrs. 

Reduction  to 
Sidereal 
Time. 

Min. 

Reduc- 
tion to 
Sidereal 
Time. 

Min. 

Reduc- 
tion to 
Sidereal 
Time. 

h. 

m. 

s. 

m. 

s. 

m. 

s. 

h. 

m. 

s. 

m. 

s 

m. 

s. 

1 

0 

9.83 

1 

0.16 

31 

5-o8 

1 

0 

9.86 

1 

0.16 

31 

5-09 

2 

0 

19.66 

2 

0-33 

32 

5-24 

2 

0 

19.71 

2 

0-33 

32 

5-26 

3 

o 

29.49 

3 

0.49 

33 

5.41 

3 

o  29.57 

3 

0.49 

33 

5.42 

4 

o  39.32 

4 

0.66 

34 

5-57 

4 

o  3943 

4 

0.66 

34 

5-59 

5 

o  49.15 

5 

0.82 

35 

5-73 

5 

o  49.28 

5 

0.82 

35 

5-75 

6 

o  58.98 

6 

0.98 

36 

5.90 

6 

o  59.14 

6 

0.99 

36 

5-91 

.7 

I 

8.81 

7 

i. 

[5 

37 

6.06 

7 

I 

9.00 

7 

5 

37 

6.08 

8 

I 

18.64 

8 

I. 

$i 

38 

6.23 

8 

I  18.85 

8 

i.' 

;i 

38 

6.24 

9 

I  28.47 

9 

1.47 

39 

6-39 

9 

I  28.71 

9 

1.48 

39 

6.41 

10 

I  38.30 

10 

1.64 

40 

6-55 

10 

I  38.57 

10 

1.64 

40 

6.57 

ii 

I  48.13 

ii 

1.80 

41 

6.72 

ii 

I  t 

18.42 

ii 

1.81 

41 

6-74 

12    ! 

I  57.96 

12 

1.97 

42 

6.88 

12 

I  58.28 

12 

1.97 

42 

6.90 

13 

2 

7.78 

13 

2.13 

43 

7.05 

13 

2 

8.13 

13 

2.14 

43 

7.06 

14 

2 

17.61 

14 

2.29 

44 

7.21 

14 

2    17.99 

14 

2.30 

44 

7.23 

15 

2    27.44 

15 

2.46 

45 

7-37 

15 

2    27.85 

15 

2.46 

45 

7-39 

16 

2    37.27 

16 

2.62 

46 

7-54 

16 

2    37.70 

16 

2.63 

46 

7.56 

17 

2  47.10 

17 

2.79 

47 

7.70 

17 

2    47.56 

17 

2.79 

47 

7-72 

18 

2    56.93 

18 

2-95 

48 

7.86 

18 

2    5742 

18 

2.96 

48 

7.89 

19 

3 

6.76 

19 

[i 

49 

8.03 

19 

3 

7.27 

19 

3.12 

49 

8.05 

20 

3   16.59 

20 

3-28 

50 

8.19 

20 

3    17.13 

20 

3-29 

50 

8.21 

21 

3  26.42 

21 

3-44 

51 

8.36 

21 

3  26.99 

21 

3-45 

51 

8.38 

22 

3  36.25 

22 

3-6o 

52 

8.52 

22 

3  36.84 

22 

3.6 

>i 

52 

8-54 

23 

3  46.08 

23 

3-77 

53 

8.68 

23 

3  46.70 

23 

3-78 

53 

8.71 

24 

3  55-91 

24 

3-93 

54 

8.85 

24 

3  56.56 

24 

3-94 

54 

8.87 

25 

4.10 

55 

9.01 

25 

4.11 

55 

9.04 

26 

4.26 

56 

9.17 

26 

4.27 

56 

9.20 

27 

4.42 

57 

9-34 

27 

4-43 

57 

9-36 

28 

4.59 

58 

9-50 

28 

4.60 

58 

9-53 

29 

4-75 

59 

9.67 

29 

4.76 

59 

9-69 

30 

4.92 

60 

9.83 

30 

4-93 

60 

9.86 

Reduction  for  Seconds—  sidereal  or 

mean  solar. 

The 

tabular  values  are  to  be  {^^^^^m^aii 

a.  si  erea   i   time  interval. 

Sidereal 
or 

0 

1 

2 

3 

4            5 

6 

7 

8 

9 

Mean  Time. 

s. 

s. 

s. 

s. 

s. 

s.             s. 

s. 

s. 

s. 

s. 

0 

0.00 

o.oo 

O.OI 

O.OI 

O.OI          O.OI 

0.02 

O.O2 

0.02 

0.03 

10 

•03 

•03 

•03 

.04 

.04          .04 

.04 

.05 

.05 

•05 

20 

.06 

.06 

.06 

.06 

.07      .07 

.07 

.07 

.08 

.08 

30 

.08 

.09 

.09 

.09 

.09         .10 

.10 

.10 

.IO 

.11 

40 

.11 

.11 

.12 

.12 

.12              .12 

.13 

•!3 

•13 

.13 

50 

0.14 

0.14 

0.14 

0.15 

0.15           0.15 

0.15 

0.16 

0.16 

0.16 

SMITHSONIAN  TABLES. 


218 


MISCELLANEOUS    TABLES. 


Density  of  air  at  different  temperatures  Fahrenheit  ....     TABI,E    81 

Density  of  air  at  different  humidities  and  pressures  —  English 
measures. 

Term  for  humidity:  auxiliary  to  Table  83  ...     .     .     TABUS     82 


Values  of  = 

29.921  29.921 

Density  of  air  at  different  temperatures  Centigrade    ....  TABUS     84 

Density  of  air  at  different  humidities  and  pressures  —  Metric 
measures. 

Term  for  humidity  :    auxiliary  to  Table  86       ....  TABUS     85 

TT  1  r    ^       £  —  0.378  <? 

Values  of  ——  =  -                      ..........  86 

760  760 

Conversion  of  avoirdupois  pounds  and  ounces  into  kilogrammes  TABUS     87 

Conversion  of  kilogrammes  into  avoirdupois  pounds  and  ounces  88 

Conversion  of  grains  into  grammes    ......     ...  TABUS     89 

Conversion  of  grammes  into  grains    .........  90 

Conversion  of  units  of  magnetic  intensity  .......  TABUS    91 

Quantity  of  water  corresponding  to  given  depths  of  rainfall  .  TABUS     92 

Dates  of  Dove's  pentades      .....     .     .     .     .     .     .     .     .  TABUS    93 

Division  by  28  of  numbers  from  28  to  867972    .....  TABUS    94 

Division  by  29  of  numbers  from  29  to  898971     ....     .  95 

Division  by  31  of  numbers  from  31  to  960969    .     .     .     .     f  96 

Natural  sines  and  cosines     ............  TABUS    97 

Natural  tangents  and  cotangents  ......  %  .     .     .     .  TABUS    98 

Logarithms  of  numbers    .............  TABUS    99 

LIST  OF  MET£OROI,OGICAI,  STATIONS                                                      .  TABI<E    IOO 


219 


TABLE  81. 

DENSITY   OF  AIR    AT    DIFFERENT  TEMPERATURES    FAHRENHEIT. 

a  0.00129305 


1+0.0020389(^-32°) 

i  cubic  centimetre  of  dry  air  at  the  temperature  32°  F.  and  pressure  760  mm.,  and  under 
the  standard  value  of  gravity  at  latitude  45°  and  sea-level,  weighs  0.00129305  gramme. 


Temper- 
ature. 

* 

Log8t 

Temper- 
ature. 

* 

LogS, 

Temper, 
ature. 

* 

Log8t 

F. 

0.00 

—  IO 

F. 

0.00 

—  10 

F. 

0.00 

—  10 

-45° 

J5339 

7.18579 

30° 

12983 

7.11339 

75° 

11888 

7.07512 

-40 

I5I55 

.18056 

31 

12957 

.11250 

76 

11866 

.07430 

-35 

14977 

.17541 

32 

12931 

.11162 

77 

11844 

.07349 

-30 

14802 

.17031 

33 

12904 

.11073 

78 

11822 

.07268 

-25 

14631 

.16527 

34 

12878 

.10985 

79 

11800 

.07187 

0.00 

o.oo 

0.00 

-20 

14464 

7.  16029 

35 

12852 

7.10897 

80 

11778 

7.07107 

-18 

14398 

.15831 

36 

12826 

.  10809 

81 

11756 

.07026 

-16 

14333 

.15634 

37 

12800 

.  10721 

82 

11734 

.06946 

-14 

14269 

.15439 

38 

12774 

.10633 

83 

11713 

.06865 

—  12 

14205 

.15244 

39 

12749 

.10546 

84 

11691 

.06785 

0.00 

0.00 

0.00 

-10 

14142 

7.15050 

40 

12723 

7.10459 

85 

11670 

7.06705 

-  8 

14079 

.14856 

4i 

12698 

.10372 

86 

11648 

.06625 

-  6 

14017 

.  14664 

42 

12672 

.10285 

87 

11627 

.06546 

-  4 

13955 

.14472 

43 

12647 

.10198 

88 

11605 

.06466 

—  2 

13894 

.  14282 

44 

12622 

.10112 

89 

11584 

.06387 

o.oo 

0.00 

o.oo 

+  0 

13833 

7.14092 

45 

12597 

7.10025 

90 

11563 

7.06307 

I 

13803 

.13997 

46 

12572 

.09939 

91 

11542 

.06228 

2 

-  *3773 

.13903 

47 

12547 

.09853 

92 

11521 

.06149 

3 

13743 

.13808 

48 

12522 

.09767 

93 

11500 

.06070 

4 

I37I3 

.13714 

49 

12497 

.09682 

94 

11479 

.05992 

o.oo 

o.oo 

0.00 

5 

13684 

7.13621 

50 

12473 

7.09596 

95 

11458 

7.05913 

6 

13654 

•13527 

5i 

12448 

.09511 

96 

11438 

.05835 

7 

13625 

.13434 

52 

12424 

.09426 

97 

11418 

.05757 

8 

13596 

.13340 

53 

12400 

.09341 

98 

11397 

.05678 

9 

13567 

.13247 

54 

12375 

.09256 

99 

11376 

.05600 

o.oo 

0.00 

o.oo 

10 

13538 

7.13155 

55 

12351 

7.09171 

100 

11356 

7.05523 

ii 

13509 

.  13062 

56 

12327 

.09087 

101 

11336 

.05445 

12 

13480 

.12970 

57 

12303 

.09002 

IO2 

11315 

.05367 

13 

13452 

.12877 

58 

12280 

.08918 

103 

11295 

.05290 

14 

13423 

.12785 

59 

12256 

.08834 

104 

11275 

.05213 

0.00 

o.oo 

0.00 

15 

13395 

7.12694 

60 

12232 

7.08750 

105 

11255 

7.05136 

16 

13367 

.12602 

61 

12209 

.08667 

106 

11235 

.05058 

17 

13338 

.12510 

62 

12185 

.08583 

107 

11215 

.04982 

18 

13310 

.12419 

63 

12162 

.08500 

108 

11196 

.04905 

19 

13282 

.12328 

64 

12138 

.08416 

109 

11176 

.04828 

o.oo 

0.00 

0.00 

20 

13255 

7.12237 

65 

12115 

7.08334 

110 

11156 

7.04752 

21 

13227 

.12147 

66 

12092 

.08251 

112 

11117 

.04599 

22 

13200 

.12056 

67 

12069 

.08168 

114 

11078 

.04447 

23 

13172 

.11966 

68 

12046 

.08085. 

116 

11040 

.04296 

24 

13145 

.11876 

69 

12023 

.08003 

118 

IIOOI 

.04145 

o.oo 

o.oo 

o.oo 

25 

13118 

7.11786 

70 

I2OOI 

7.07921 

120 

10963 

7.03994 

26 

13091 

.11696 

7i 

11978 

.07839 

125 

10870 

.03621 

27 

13064 

.11606 

72 

11956 

.07757 

130 

10776 

.03248 

28 

13037 

•11517 

73 

11933 

.07675 

135 

10686 

.02883 

29 

13010 

.11428 

74 

11910 

.07593 

140 

10597 

.02518 

SMITHSONIAN  TABLES. 


220 


TABLE   82. 
DENSITY    OF  AIR   AT    DIFFERENT    HUMIDITIES  AND    PRESSURES. 

ENGLISH    MEASURES. 

Term    for    Humidity:   Values    of  0.378*.     Auxiliary  to  Table  83. 
*  =  Vapor  pressure  in  inches. 


Dew- 
Point. 

n  Vapor 
Pressure. 
e. 

0,378*. 

Dew- 
Point. 

Vapor 
Pres- 
sure. 
e. 

0.378*. 

Dew- 
Point. 

Vapor 
Pres- 
sure. 
e. 

0.378*. 

Dew- 
Point. 

Vapor 
Pres- 
sure. 
*. 

0.378*. 

F. 

Inch. 

Inch. 

F. 

Inch. 

Inch. 

F. 

Inch. 

Inch. 

F. 

Inches. 

Inches. 

-40° 

0.0054 

0.002 

5° 

0.057 

0.021 

50° 

0.360 

0.136 

95° 

1.645 

0.622 

—  39 

.0058 

.002 

6 

•059 

.022 

51 

•373 

.141 

96 

1.696 

.641 

—  38 

.0061 

.OO2 

7 

.062 

.023 

52 

.387 

.146 

97 

1.749 

.661 

-37 

.0065 

.002 

8 

.065 

.025 

53 

.402 

.152 

98 

1.803 

.682 

-36 

.0069 

.003 

9 

.068 

.026 

54 

.417 

.158 

99 

1.859 

•703 

-35 

0.0073 

0.003 

10 

0.071 

0.027 

55 

0.432 

0.163 

100 

1.916 

0.724 

-34 

.0077 

.003 

ii 

.074 

.028 

56 

.448 

.169 

IOI 

1-975 

•  747 

-33 

.0082 

•003 

12 

.078 

.029 

57 

•465 

.176 

IO2 

2.035 

.769 

-32 

.0087 

.003 

13 

.081 

.031 

58 

.481 

.182 

I03 

2.097 

•793 

-3i 

.0092 

.003 

14 

.085 

.032 

59 

•499 

.I89 

104 

2.l6o 

.816 

-30 

0.0097 

0.004 

15 

0.088 

0.033 

60 

0.517 

0.195 

105 

2.225 

0.841 

-29 

.0103 

.004 

16 

.092 

•035 

61 

•536 

.203 

106 

2.292 

.866 

-28 

.0109 

.004 

17 

.096 

.036 

62 

•555 

.210 

107 

2.360 

.892 

-27 

.0115 

.OO4 

18 

.101 

.038 

63 

•575 

.217 

108 

2.431 

.919 

-26 

.0121 

.005 

J9 

.105 

.040 

64 

•595 

.225 

109 

2.503 

.946 

-25 

0.0128 

0.005 

20 

O.I  10 

0.042 

65 

0.616 

0.233 

110 

2.576 

0.974 

-24 

•0135 

.005 

21 

.114 

.043 

66 

.638 

.241 

in 

2.652 

1.002 

-23 

.0142 

.005 

22 

.119 

•045 

67 

.661 

.250 

112 

2.730 

I.03I 

—  22 

.0150 

.006 

23 

.124 

.047 

68 

.684 

•259 

H3 

2.810 

1.062 

—  21 

.0158 

.006 

24 

.130 

.049 

69 

.707 

.267 

114 

2.891 

1.093 

-20 

O.OI67 

0.006 

25 

0.135 

0.051 

70 

0.732 

0.277 

115 

2.975 

I.I25 

-19 

.0176 

.007 

26 

.141 

•053 

7i 

•757 

.286 

116 

3.061 

LI57 

-18 

.0185 

.007 

27 

.147 

.056 

72 

•783 

.296 

117 

3.148 

I.I90 

-17 

.OI95 

.007 

28 

.153 

.058 

73 

.810 

.306 

118 

3-239 

1.224 

-16 

.0205 

.008 

29 

.159 

.060 

74 

.838 

.317 

119 

3-331 

1-259 

-15 

0.0216 

0.008 

30 

0.166 

0.063 

75 

0.866 

0.327 

120 

3.425 

1-295 

-14 

.0227 

.009 

3i 

.173 

.065 

76 

.896 

•339 

121 

3.522 

I-33I 

-13 

.0239 

.009 

32 

.180 

.068 

77 

.926 

.350 

122 

3.621 

1.369 

—  12 

.0251 

.009 

33 

.187 

.071 

78 

•957 

.362 

123 

3.723 

1.407 

—  II 

.0264 

.010 

34 

.195 

.074 

79 

.989 

•374 

124 

3.827 

1.447 

-10 

0.0277 

O.OIO 

35 

0.203 

0.077 

80 

1.022 

0.386 

125 

3-933 

1.487 

-   9 

.0292 

.Oil 

36 

.211 

.080 

Si 

1.056 

•399 

126 

4.042 

1.528 

-   8 

.0306 

.012 

37 

.219 

•083 

82 

.091 

.412 

127 

4.154 

1.570 

-   7 

.0322 

.012 

38 

.228 

.086 

83 

.127 

.426 

128 

4.268 

I.6I3 

-   6 

.0338 

.013 

39 

•237 

.090 

84 

.163 

•440 

129 

4.385 

1.658 

-   5 

0.0354 

0.013 

40 

0.246 

0.093 

85 

.201 

0-454 

130 

4.504 

1.703 

-   4 

.0372 

.014 

4i 

.256 

.097 

86 

.241 

.469 

131 

4.627 

1.749 

-   3 

.0390 

.015 

42 

.266 

101 

87 

.281 

.484 

132 

4.752 

1.796 

—     2 

.0409 

.015 

43 

.276 

.105 

88 

.322 

.500 

133 

4.880 

1.844 

—     I 

.0429 

.016 

44 

.287 

.109 

89 

.364 

.516 

134 

5.011 

1.894 

0 

0.0449 

O.OI7 

45 

0.298 

O.II3 

90 

.408 

0.532 

135 

5-145 

1-945 

+   i 

.0471 

.018 

46 

.310 

.117 

9i 

•453 

•  549 

136 

5-282 

1.997 

2 

.0493 

.019 

47 

.322 

.122 

92 

•499 

.567 

137 

5.422 

2.050 

3 

.0517 

.020 

48 

•334 

.126 

93 

.546 

•  584 

138 

5.565 

2.104 

4 

.0541 

.O2O 

49 

•347 

•131 

94 

•595 

.603 

139 

5-712 

2.159 

5 

0.0567 

O.O2I 

50 

0.360 

0.136 

95 

1.645 

0.622 

140 

5-862 

2.216 

SMITHSONIAN  TABLES. 


221 


TABLE    83. 

DENSITY    OF   AIR    AT    DIFFERENT    HUMIDITIES   AND    PRESSURES. 

ENGLISH    MEASURES. 

Ji 8  h     _b  -o.378<? 

29.921 


Values   of 


29.921  So      29.921 

b  =  Barometric  pressure  in  inches;     <?  —  Vapor  pressure  in  inches. 


h. 

h 

Lo    h 

h. 

h 

Loa   h 

h. 

h 

Lnn    h 

29.921 

29.921 

29.291 

L°9  29.921' 

29.921 

29.92I 

Inch's. 

—  10 

Inches. 

—  10 

Inches. 

—  IO 

10.0 

0-3342 

9.52402 

15.0 

0.5013 

9.70012 

20.0 

0.6684 

9.82505 

10.  1 

.3376 

.52835 

15-1 

.5047 

.70300 

20.  i 

.6718 

.82722 

10.2 

•3409 

.53262 

15-2 

.5080 

.70587 

20.  2 

.6751 

.82938 

10.3 

•3442 

.53686 

15-3 

.5H3 

.70871 

20.3 

.6784 

.83152 

10.4 

.3476 

.54io6 

154 

.5147 

.71154 

20.4 

.6818 

•83365 

10.5 

0.3509 

9-54521 

15.5 

0.5180 

9-7I435 

20.5 

0.6851 

9.83578 

10.6 

•3543 

•54933 

15-6 

.5214 

.71715 

20.6 

.6885 

.83789 

10.7 

.3576 

.55341 

15.7 

.5247 

.71992 

20.7 

.6918 

.83999 

10.8 

.3609 

.55745 

15-8 

.5281 

.72268 

20.8 

.6952 

.84209 

10.9 

•3643 

•56145 

15.9 

.5314 

.72542 

20.9 

.6985 

.84417 

11.0 

0.3676 

9-56542 

16.0 

0-5347 

9.72814 

21.0 

0.7018 

9.84624 

ii.  i 

.3710 

.56935 

16.1 

.5381 

.73085 

21.  1 

.7052 

.84831 

II.  2 

•3743 

.57324 

16.2 

.5414 

•73354 

21.2 

.7085 

.85036 

".3 

•3777 

•57710 

16.3 

.5448 

.73621 

21.3 

.7119 

.85240 

11.4 

.3810 

.58093 

16.4 

.5481 

.73887 

21.4 

.7152 

.85444 

11.5 

0.3843 

9.58472 

16.5 

0.5515 

9.74I5I 

21.5 

0.7186 

9.85646 

n.6 

.3877 

.58848 

16.6 

.5548 

.74413 

21.6 

.7219 

.85848 

11.7 

.3910 

.59221 

16.7 

.5581 

.74674 

21.7 

.7252 

.86048 

n.8 

•3944 

.59591 

16.8 

•5615 

•74933 

21.8 

.7286 

.86248 

11.9 

•3977 

-59957 

16.9 

.5648 

.75191 

21.9 

.7319 

.86447 

12.0 

0.4011 

9.60321 

17.0 

0.5682 

9-75447 

22.0 

0-7353 

9-86645 

12.  1 

.4044 

.60681 

17.1 

.5715 

.75702 

22.1 

.7386 

.86842 

12.2 

.4077 

.61038 

17.2 

.5748 

•75955 

22.2 

.7420 

.87038 

12.3 

.4111 

.61393 

17.3 

.5782 

.76207 

22.3 

-7453 

.87233 

12.4 

.4144 

.61745 

17.4 

•5815 

.76457 

22.4 

.7486 

.87427 

12.5 

0.4178 

9.62093 

17.5 

0.5849 

9.76706 

22.5 

0.7520 

9.87621 

12.6 

.4211 

.62439 

17.6 

.5882 

.76954 

22.6 

•7553 

.87813 

12.7 

.4244 

.62782 

17.7 

.5916 

.77200 

22.7 

.7587 

.88005 

12.8 

.4278 

.63123 

17.8 

•5949 

•77444 

22.8 

.7620 

.88196 

12.9 

.43H 

.63461 

17.9 

.5982 

.77687 

22.9 

•7653 

.88386 

13.0 

0.4345 

9-63797 

18.0 

0.6016 

9.77930 

23.0 

0.7687 

9.88575 

I3-I 

.4378 

.64130 

18.1 

.6049 

.78170 

23.1 

.7720 

.88764 

13.2 

.4412 

.64460 

18.2 

.6083 

.78410 

23.2 

•7754 

•88951 

13.3 

•4445 

.64788 

18.3 

.6116 

.78648 

23-3 

.7787 

.89138 

13.4 

.4478 

.65113 

18.4 

.6149 

.78884 

23-4 

.7821 

.89324 

13.5 

0.4512 

9-65436 

18.5 

0.6183 

9.79120 

23.5 

0.7854 

9.89509 

13-6 

•4545 

.65756 

18.6 

.6216 

•79354 

23.6 

.7887 

.89693 

13-7 

•4579 

.66074 

18.7 

.6250 

.79587 

23-7 

.7921 

.89877 

13-8 

.4612 

.66390 

18.8 

.6283 

.79818 

23-8 

•7954- 

.90060 

13-9 

.4646 

.66704 

18.9 

.6317 

.80049 

23-9 

.7988 

.90242 

14.0 

0.4679 

9.67015 

19.0 

0.6350 

9.80278 

24.0 

0.8021 

9.90424 

14.1 

.4712 

.67324 

19.1 

-6383 

.80506 

24.1 

.8054 

.90604 

14.2 

.4746 

.67631 

19.2 

.6417 

•80733 

24.2 

.8088 

.90784 

14-3 

•4779 

.67936 

19-3 

.6450 

.80958 

24.3 

.8121 

.90963 

14.4 

.4813 

.68239 

19.4 

.6484 

.81183 

24-4 

.8i55 

.91141 

14.5 

0.4846 

9-68539 

19.5 

0.6517 

9.81406 

24.5 

0.8188 

9.91319 

14.6 

.4879 

.68837 

19.6 

•6551 

.81628 

24.6 

.8222 

.91496 

14.7 

•49T3 

.69134 

19.7 

.6584 

.81849 

24-7 

•8255 

.91672 

14.8 

.4946 

.69429 

19.8 

.6617 

.82069 

24.8 

.8289 

.91848 

14.9 

.4980 

.69721 

19.9 

.6651 

.82288 

24.9 

.8322 

.92022 

SMITHSONIAN  TABLES. 


222 


TABLE  83. 
DENSITY    OF   AIR    AT    DIFFERENT    HUMIDITIES   AND    PRESSURES. 

ENGLISH    MEASURES. 


'b  =  Barometric  pressure  in  inches  ;    e  =  Vapor  pressure  in  inches. 


h. 

h 

Loo   h 

h. 

h 

Loa   h 

h. 

h 

Lnn   ^ 

29.921 

L°9  29.921 

29.921 

L°9  29.921 

29.921 

09  29.92! 

Inches. 

—  IO 

Inches. 

—  IO 

Inches. 

—  10 

25.00 

0.8355 

9.92196 

27.25 

0.9107 

9-95939 

29.50 

0.9859 

9.99385 

25-05 

.8372 

.92283 

27.30 

.9124 

.96019 

29-55 

.9876 

.99458 

25.10 

.8389 

.92370 

27.35 

.9141 

.96098 

29.60 

.9893 

•99532 

25-15 

.8405 

.92456 

27.40 

•9!57 

.96177 

29-65 

.9909 

.99605 

25.20 

.8422 

.92542 

27.45 

.9174 

.96256 

29.70 

.9926 

.99678 

25.25 

0.8439 

9.92628 

27.50 

0.9191 

9.96336 

29.75 

0.9943 

9.99751 

25.30 

.8456 

.92714 

27-55 

.9208 

.96414 

29.80 

.9960 

.99824 

25.35 

.8472 

.92800 

27.60 

.9224 

.96493 

29.85 

•9976 

.99897 

25-40 

.8489 

.92886 

27.65 

.9241 

.96572 

29.90 

•9993 

.99970 

25.45 

.8506 

.92971 

27.70 

.9258 

.96650 

29-95 

I.OO^O 

0.00042 

25.50 

0.8522 

9.93056 

27.75 

0.9274 

9.96728 

30.00 

1.0026 

O.OOII5 

25-55 

•8539 

.93141 

27.80 

.9291 

.96807 

30.05 

1.0043 

.00187 

25.60 

.8556 

.93226 

27.85 

.9308 

.96885 

30.10 

1.  0060 

.00259 

25-65 

.8573 

.93311 

27.90 

•9325 

.96963 

3°-I5 

1.0076 

.00331 

25-70 

.8589 

.93396 

27.95 

.9341 

.97040 

30.20 

1.0093 

.00403 

25.75 

0.8606 

9.93480 

28.00 

0.9358 

9.97118 

30.25 

I.  OIIO 

0.00475 

25.80 

.8623 

.93564 

28.05 

•9375 

.97195 

30.30 

1.0127 

.00547 

25-85 

.8639 

.93648 

28.10 

.9391 

.97273 

30.35 

1.0143 

.00618 

25-90 

.8656 

.93732 

28.15 

.9408 

.97350 

30.40 

1.  0160 

.00690 

25-95 

•8673 

.93816 

28.20 

.9425 

.97427 

30.45 

1.0177 

.00761 

26.00 

0.8690 

9.93900 

28.25 

0.9441 

9.97504 

30.50 

1.0193 

0.00832 

26.05 

.8706 

.93983 

28.30 

.9458 

.97581 

30.55 

1.  0210 

.00903 

26.10 

.8723 

.94066 

28.35 

•9475 

.97657 

30.60 

1.0227 

.00975 

26.15 

.8740 

.94149 

28.40 

.9492 

•97734 

30.65 

1.0244 

.01045 

26.20 

.8756 

.94233 

28.45 

.9508 

.97810 

30.70 

1.0260 

.OIIl6 

26.25 

0.8773 

9.94315 

28.50 

0.9525 

9.97887 

30.75 

1.0277 

O.OII87 

26.30 

.8790 

.94398 

28.55 

.9542 

.97963 

30.80 

1.0294 

.01257 

26.35 

.8806 

.94480 

28.60 

.9558 

.98039 

30.85 

1.0310 

.01328 

26.40 

•  8823 

.94563 

28.65 

•9575 

.98115 

30.90 

1.0327 

.01398 

26.45 

.8840 

.94645 

28.70 

•9592 

.98191 

30.95 

1.0344 

.01468 

26.50 

0.8857 

9.94727 

28.75 

0.9609 

9.98266 

31.00 

1.0361 

0.01539 

26.55 

.8873 

.94809 

28.80 

.9625 

.98342 

V-OS 

1.0377 

.01608 

26.60 

.8890 

.94891 

28.85 

.9642 

.98417 

31.10 

1.0394 

.01678 

26.65 

.8907 

.94972 

28.90 

.9659 

.98492 

3LI5 

1.0411 

.01748 

26.70 

.8924 

.95054 

28.95 

.9675 

.98567 

31.20 

1.0427 

.Ol8l8 

26.75 

0.8940 

9.95135 

29.00 

0.9692 

9.98642 

31.25 

1.0444 

0.01887 

26.80 

.8957 

.95216 

29.05 

.9709 

.98717 

31-30 

1.0461 

.01957 

26.85 

.8974 

.95297 

29.10 

.9726 

.98792 

31-35 

1.0478 

.O2O26 

26.90 

.8990 

.95378 

29.15 

.9742 

.98866 

31.40 

1.0494 

.02095 

26.95 

.9007 

.95458 

29.20 

•9759 

.98941 

31-45 

1.0511 

.02164 

27.00 

0.9024 

9.95539 

29.25 

0.9776 

9.99015 

31.50 

1.0528 

0.02233 

27.05 

.9040 

.95619 

29.30 

.9792 

.99089 

3L55 

1.0544 

.02302 

27.10 

•9057 

.95699 

29-35 

.9809 

.99163 

31.60 

1.0561 

.02371 

27.15 

.9074 

.95779 

29.40 

.9826 

.99237 

31-65 

1.0578 

.02439 

27.20 

.9091 

.95859 

29-45 

.9843 

•993II 

31.70 

1.0594 

.02508 

SMITHSONIAN  TABLES. 


223 


TABLE  84. 

DENSITY    OF  AIR    AT    DIFFERENT   TEMPERATURES    CENTIGRADE. 

0.00129305 


i  cubic  metre  of  dry  air  at  the  temperature  o°  C.  and  pressure  760  mm.,  and  under  the 
standard  value  of  gravity  at  latitude  45°  and  sea  level,  weighs  1.29305  kilogramme. 


t. 

St,76o 

Log  St,  760 

t. 

5j 
dt,  760 

Log  St,  76o 

t. 

St,76o 

L°g  8tf  76o 

C. 

0.00 

—  10 

C. 

0.00 

—  IO 

c. 

0.00 

—  10 

-34° 

14774 

7.16950 

-  4?5 

13148 

7.11885 

I8?0 

12129 

7.08383 

-33 

14712 

.16768 

-  4.0 

I3I23 

.11804 

18.5 

12108 

8309 

-32 

14651 

.16587 

-  3-5 

13099 

.11723 

19.0 

12088 

8234 

-3i 

14590 

.16407 

-  3-o 

13074 

.11642 

19-5 

12067 

8160 

o.oo 

0.00 

0.00 

-30 

14530 

7.16227 

-  2.5 

13050 

7.11562 

20.0 

12046 

7.08085 

-29 

14471 

.16049 

—  2.0 

13026 

.11481 

20.5 

12026 

8011 

-28 

14412 

.15871 

-  1-5 

13002 

.11401 

21.0 

12005 

7937 

-27 

14353 

.15693 

—  1.0 

12978 

.11321 

21.5 

11985 

7863 

-26 

14295 

.15517 

-  0.5 

12954 

.11241 

22.0 

11965 

7789 

0.00 

0.00 

0.00 

-25 

-24 

14237 
14179 

7.15341 

.15166 

0.0 

+  0.5 

12931 
12907 

7.11162 
.11082 

22.5 

23.0 

11944 
11924 

7.07716 
7642 

-23 

14123 

.14991 

I.O 

12884 

.11006 

23-5 

11904 

7569 

—  22 

14066 

.14818 

i-5 

12860 

.10923 

24.0 

11884 

7496 

—  21 

14010 

.14645 

2.0 

12836 

.10844 

24.5 

11864 

7422 

o.oo 

0.00 

0.00 

-20.0 

13955 

7.14472 

2.5 

12813 

7.10765 

25.0 

11844 

7.07349 

-19-5 

13927 

.14386 

3-0 

12790 

.10686 

25-5 

11824 

7276 

—  19.0 

13900 

.14301 

3-5 

12766 

.10607 

26.0 

11804 

7204 

-18.5 

13872 

.14215 

4.0 

12744 

.10529 

26.5 

11784 

7i3i 

—  18.0 

-  13845 

.14130 

4-5 

12720 

.  10450 

27.0 

11765 

7058 

0.00 

o.oo 

o.oo 

-17.5 

13818 

7.14044 

5.0 

12698 

7.10372 

27.5 

H745 

7.06986 

-17.0 

I3791 

.13959 

5-5 

12675 

.  10294 

28.0 

11726 

6913 

-16.5 

13764 

.13874 

6.0 

12652 

.10216 

28.5 

11706 

6841 

—  16.0 

13737 

.13790 

6.5 

12629 

.10138 

29.0 

11687 

6769 

-15-5 

13710 

.13705 

7.0 

12607 

.  10069 

29-5 

11667 

6697 

0.00 

0.00 

0.00 

-15.0 

13684 

7.13621 

7.5 

12584 

7.09982 

30.0 

11648 

7.06625 

-14-5 

13657 

.13536 

8.0 

12562 

30.5 

11629 

6554 

-14.0 

13631 

.13452 

8-5 

12539 

9828 

31.0 

11610 

6482 

-I3-5 

13604 

.13368 

9.0 

12517 

9750 

3i-5 

11591 

6411 

-13-0 

13578 

.13285 

9-5 

12495 

9673 

32.0 

11572 

6340 

0.00 

0.00 

0.00 

-12.5 

13552 

7.13201 

10.0 

12473 

7.09596 

32.5 

11553 

7.06268 

—  I2.O 

13526 

.13117 

10.5 

12451 

9519 

33-o 

11534 

6197 

-ii.S 

13500 

.13034 

II.  0 

12429 

9443 

33-5 

11515 

6126 

—  II.  0 

13473 

.12951 

".5 

12407 

9366 

34-0 

11496 

6055 

-10.5 

13449 

.12868 

12.0 

12385 

9290 

34-5 

11477 

5984 

0.00 

o.oo 

0.00 

-10.0 

13423 

7.12785 

12.5 

12363 

7.09214 

35.0 

11459 

7.05913 

-  9-5 

13398 

.12703 

13-0 

12342 

e7 

35-5 

11440 

5843 

-  9.0 

13372 

.12620 

*3-5 

12320 

i 

36.0 

11421 

5772 

-  8.5 

13347 

.12538 

14.0 

12299 

6 

36.5 

11403 

5702 

-  8.0 

13322 

.12456 

14.5 

12277 

8910 

37.o 

11385 

5632 

0.00 

o.oo 

0.00 

-  7.5 

13297 

7.12374 

15.0 

12256 

7.08834 

37.5 

11366 

7.05562 

-  7.0 

13271 

.12292 

15-5 

12235 

8759 

38.0 

11348 

5492 

-  6.5 

13246 

.12210 

16.0 

12213 

8683 

38.5 

11330 

5422 

-  6.0 

13222 

.12128 

16.5 

12192 

8608 

39-o 

11311 

5352 

-  5-5 

13197 

.12047 

17.0 

12171 

8533 

39-5 

11293 

5282 

0.00 

o.oo 

0.00 

-  5.0 

13172 

7.11966 

17.5 

12150 

7.08458 

40.0 

11275 

7.05213 

SMITHSONIAN  TABLES. 


224 


TABLE   84, 
DENSITY   OF   AIR    AT    DIFFERENT   TEMPERATURES    CENTIGRADE. 

( Continued. ) 


t. 

St,  760 

Log  St,76o 

t. 

\  760 

Log  8t,76o 

t. 

8t,  760 

Log  8t,  760 

c. 

o.oo 

—  10 

C. 

o.oo 

—  10 

c. 

o.oo 

—  10 

40° 

11275 

7.05213 

50° 

10926 

7.03845 

60° 

10597 

7.02518 

4i 

11239 

.05074 

51 

10892 

.03710 

61 

10565 

.02388 

42 

11204 

.04936 

52 

10858 

.03576 

62 

10534 

.02258 

43 

11168 

.04798 

53 

10825 

.03443 

63 

10502 

.02128 

44 

11133 

.04660 

54 

10792 

.03309 

64 

10471 

.01999 

o.oo 

0.00 

0.00 

45 

11098 

7.04523 

55 

10759 

7.03177 

65 

10440 

7.01870 

46 

11063 

.04387 

56 

10726 

.03044 

66 

10409 

.01742 

47 

11028 

.04251 

57 

10694 

.02912 

67 

10379 

.01614 

48 

10994 

.04115 

58 

10661 

.02780 

68 

10348 

.01486 

49 

10960 

.03980 

59 

10629 

.02649 

69 

10318 

•01358 

TABLE  85. 
DENSITY    OF   AIR    AT    DIFFERENT    HUMIDITIES   AND    PRESSURES. 

METRIC    MEASURES. 

Term    for    humidity:    values    of  0.378*.     Auxiliary  to  Table  86. 
e.  =  vapor  pressure  in  mm. 


Dew- 
point. 

Vapor 
Pressure, 
e 

0.378* 

Dew- 
point. 

Vapor 
Pressure. 
e 

0.378* 

Dew- 
point. 

Vapor 
Pressure. 
e 

0.378* 

C. 

mm. 

mm. 

C. 

mm. 

mm. 

C. 

mm. 

mm. 

-30° 

0.38 

0.14 

0° 

4-57 

1-73 

30° 

3L5I 

11.91 

29 

.42 

.16 

i 

4.91 

1.86 

3i 

33-37 

I2.6l 

28 

.46 

.17 

2 

5-27 

1.99 

32 

35.32 

13.35 

27 

.50 

•19 

3 

5-66 

2.14 

33 

37-37 

14.13 

26 

•55 

.21 

4 

6.07 

2.29 

34 

39-52 

14.94 

-25 

0.61 

0.23 

5 

6.5I 

2.46 

35 

41.78 

15-79 

24 

.66 

.25 

6 

6.97 

2.63 

36 

44.16 

16.69 

23 

•73 

.28 

7 

7-47 

2.82 

37 

46.65 

17.63 

22 

•79 

.30 

8 

7-99 

3-02 

38 

49.26 

18.62 

21 

.87 

•33 

9 

8.55 

3.23 

39 

52.00 

19.66 

-20 

0.94 

0.36 

10 

9.14 

3-45 

40 

54.87 

20.74 

19 

1.03 

•39 

ii 

9-77 

3.69 

4i 

57.87 

21.86 

18 

1.  12 

.42 

12 

10.43 

3-94J 

42 

61.02 

23.06 

17 

1.22 

.46 

13 

11.14 

4.21 

43 

64.31 

24.31 

16 

1.32 

.50 

14 

11.88 

4.49 

44 

67.76 

25.61 

-15 

1.44 

0-54 

15 

12.67 

4-79 

45 

71.36 

26.97 

14 

1.56 

•59 

16 

13-51 

5.H 

46 

75-13 

28.40 

13 

1.69 

.64 

17 

14.40 

5-44 

47 

79.07 

29.89 

12 

1.84 

.70 

18 

15.33 

5.79 

48 

83.19 

31.45 

II 

1.99 

•75 

19 

16.32 

6.17 

49 

87.49 

33.07 

-10 

2.15 

0.81 

20 

17.36 

6.56 

50 

91.98 

34-77 

9 

2-33 

.88 

21 

18.47 

6.98 

5i 

96.66 

36.54 

8 

2.51 

•95 

22 

19.63 

7-42 

52 

101.55 

38.39 

7 

2.72 

•03 

23 

20.86 

7-89 

53 

106.65 

40.31 

6 

2-93 

.11 

24 

22.15 

8.37 

54 

111.97 

42.32 

-  5 

3.16 

.19 

25 

23.52 

8.89 

55 

117.52 

44.42 

4 

3.4i 

.29 

26 

24.96 

943 

56 

123.29 

46.60 

3 

3.67 

•39 

27 

26.47 

IO.OI 

57 

129-31 

48.88 

2 

3-95 

.49 

28 

28.07 

10.  6  1 

58 

135.58 

51.25 

I 

4.25 

.61 

29 

29.74 

11.24 

59 

142.10 

53-71 

SMITHSONIAN  TABLES. 


225 


TABLE    86. 

DENSITY   OF   AIR   AT    DIFFERENT    HUMIDITIES  AND   PRESSURES. 

METRIC    MEASURES. 


b  =  Barometric  pressure   in   mm.  ;    e  =  Vapor  pressure   in  mm. 


h. 

h 

760' 

UiX 

760 

h. 

h 

76o' 

Log  4- 

760 

h. 

h 

760* 

M-* 

mm. 

—  10 

mm. 

—  10 

mm. 

—  10 

300 

Q-3947 

9-59631 

400 

0.5263 

9-72125 

450 

0.5921 

9.77240 

302 

•3974 

•59919 

401 

.5276 

.72233 

45i 

•5934 

•77336 

304 

.4000 

.60206 

402 

.5289 

•72341 

452 

•5947 

•77432 

306 

.4026 

.60491 

403 

•5303 

.72449 

453 

•596i 

•77528 

308 

.4053 

.60774 

404 

•5316 

.72557 

454 

•  5974 

.77624 

310 

0.4079 

9.61055 

405 

0.5329 

9.72664 

455 

0.5987 

9.77720 

312 

.4105 

•61334 

406 

•5342 

.72771 

456 

.6000 

.77815 

314 

.4132 

.61612 

407 

•5355 

.72878 

457 

.6013 

.77910 

3i6 

.4158 

.61887 

408 

•5369 

•72985 

458 

.6026 

.78005 

3i8 

.4184 

.62161 

409 

.5382 

•73091 

459 

.6040 

.78100 

320 

0.4211 

9.62434 

410 

0-5395 

9.73*97 

460 

0.6053 

9.78194 

322 

•4237 

.62704 

411 

•  5408 

•73303 

461 

.6066 

.78289 

324 

.4263 

•62973 

412 

•5421 

.73408 

462 

.6079 

•78383 

326 

.4289 

.63240 

413 

•5434 

•73514 

463 

.6092 

.78477 

328 

.4316 

.63506 

414 

•5447 

.73619 

464 

.6105 

•78570 

330 

0.4342 

9.63770 

415 

0.5461 

9-73723 

465 

0.6118 

9.78664 

332 

.4368 

.64032 

416 

•5474 

.73828 

466 

.6132 

.78757 

334 

•4395 

.64293 

417 

.5487 

•73932 

467 

.6145 

.78850 

336 

.4421 

.64552 

418 

•5500 

.74036 

468 

.6158 

.78943 

338 

•4447 

.64810 

419 

•5513 

.74140 

469 

.6171 

.79036 

340 

0-4474 

9.65066 

420 

0.5526 

9.74244 

470 

0.6184 

9.79128 

342 

.4500 

.65321 

421 

•5540 

•74347 

47i 

.6197 

.79221 

344 

.4526 

.65574 

422 

•5553 

•74450 

472 

.6210 

•79313 

346 

•4553 

.65826 

423 

.5566 

•74553 

473 

.6224 

•79405 

348 

•4579 

.66076 

424 

•5579 

.74655 

474 

.6237 

.79496 

350 

0.4605 

9.66325 

425 

0.5592 

9-74758 

475 

0.6250 

9-79588 

352 

.4632 

•66573 

426 

•5605 

.74860 

476 

.6263 

.79679 

354 

.4658 

.66819 

427 

••5618 

.74961 

477 

.6276 

.79770 

356 

.4684 

.67064 

428 

.5632 

•75063 

478 

.6289 

.79861 

358 

.4711 

.67307 

429 

.5645 

•75164 

479 

.6303 

•79952 

360 

0.4737 

9-67549 

430 

0.5658 

9-75265 

480 

0.6316 

9.80043 

362 

.4763 

.67790 

43i 

.5671 

•75366 

481 

.6329 

.80133 

364 

.4789 

.68029 

432 

•5684 

.75467 

482 

.6342 

.80223 

366 

.4816 

.68267 

433 

•5697 

.75567 

483 

.6355 

.80313 

368 

.4842 

•68503 

434 

•5711 

.75668 

484 

.6368 

.80403 

370 

0.4868 

9.68739 

435 

0.5724 

9.75768 

485 

0.6382 

9-80493 

372 

.4895 

•68973 

436 

•5737 

.75867 

486 

•6395 

.80582 

374 

.4921 

.69206 

437 

•5750 

•75967 

487 

.6408 

.80672 

376 

•4947 

.69437 

438 

•5763 

.76066 

'  488 

.6421 

.80761 

378 

•4974 

.69668 

439 

.5776 

.76165 

489 

•  6434 

.80850 

380 

0.5000 

9.69897 

440 

0.5790 

9.76264 

490 

0.6447 

9.80938 

382 

.5026 

.70125 

441 

•5803 

.76362 

491 

.6461 

.81027 

384 

•5053 

•70352 

442 

•5816 

.76461 

492 

.6474 

.81115 

386 

•5079 

•70577 

443 

.5829 

•76559 

493 

.6487 

.81203 

388 

•5105 

.70802 

444 

.5842 

•76657. 

494 

.6500 

.81291 

390 

0.5132 

9.71025 

445 

0.5855 

9-76755 

495 

0.6513 

9.81379 

392 

•5158 

.71247 

446 

.5868 

.76852 

496 

.6526 

.81467 

394 

.5184 

.71468 

447 

.5882 

.76949 

497 

•6540 

.81556 

396 

•5211 

.71688 

448 

•5895 

•77046 

498 

.6553 

.81642 

398 

•5237 

.71907 

449 

.5908 

.77143 

499 

.6566 

.81729 

SMITHSONIAN  TABLES. 


226 


TABLE  86. 
DENSITY    OF   AIR   AT    DIFFERENT    HUMIDITIES  AND    PRESSURES. 

METRIC    MEASURES. 

8          h         b  —  0.378* 


Values    of  ^ 


760 


b  —  Barometric  pressure  in  mm.;    e  =  Vapor  pressure  in   mm. 


h. 

h 

76o' 

2& 

h. 

h 

76o" 

"•£ 

h. 

h 

760* 

**• 

mm. 

—  10 

mm. 

—  10 

mm. 

—  10 

500 

0.6579 

9.81816 

550 

0.7237 

9-85955 

600 

0.7895 

9.89734 

501 

.6592 

.81902 

55i 

•7250 

.86034 

601 

.7908 

.89806 

502 

.6605 

.81989 

552 

.7263 

.86112 

602 

.7921 

.89878 

503 

.6618 

.82075 

553 

.7276 

.86191 

603 

•7934 

.89950 

504 

.6632 

.82162 

554 

.7290 

.86270 

604 

•7947 

.90022 

505 

0.6645 

9.82248 

555 

0.7303 

9.86348 

605 

0.7961 

9.90094 

506 

.6658 

.82334 

556 

.7316 

.86426 

606 

•7974 

.90166 

507 

.6671 

.82419 

557 

.7329 

.86504 

607 

.7987 

'  .90238 

508 

.6684 

.82505 

558 

.7342 

.86582 

608 

.8000 

.90309 

509 

.6697 

.82590 

559 

•7355 

.86660 

609 

.8013 

•90380 

510 

0.6711 
.6724 

5^2676 
/8276i 

560 

56i 

0.7368 
.7382 

9.86737 
.86815 

610 

611 

0.8026 
.8040 

9.90452 
.90523 

5*2 

.6737 

.82846 

562 

.7395 

.86892 

612 

.8053 

.90594 

513 

.6750 

.82930 

563 

.7408 

.86969 

613 

.8066 

.90665 

514 

.6763 

.83015 

564 

.7421 

.87046 

614 

.8079 

.90735 

515 

0.6776 

9.83099 

565 

0-7434 

9.87123 

615 

0.8092 

9.90806 

516 

.6789 

.83184 

566 

.7447 

.87200 

616 

.8105 

.90877 

517 

.6803 

.83268 

567 

.7461 

.87277 

617 

.8118 

.90947 

.6816 

.83352 

568 

•7474 

^87353 

618 

.8132 

.91017 

519 

.6829 

.83435 

569 

.7487 

.87430 

619 

.8145 

.91088 

520 

0.6842 

9-835I9 

570 

0.7500 

9-87506 

620 

0.8158 

9.91158 

521 

.6855 

.83602 

57* 

.7513 

.87582 

621 

.8171 

.91228 

522 

.6869 

.83686 

572 

.7526 

.87658 

622 

.8184 

.91298 

523 

.6882 

.83769 

573 

•7540 

.87734 

623 

•8197 

.91367 

524 

.6895 

.83852 

574 

•7553 

.87810 

624 

.8211 

•9I437 

525 

0.6908 

9.83934 

575 

0.7566 

9.87885 

625 

0.8224 

9.91507 

526 

.6921 

.84017 

576 

•  7579 

.87961 

626 

.8237 

527 

.6934 

.84100 

577 

.7592 

.88036 

627 

.8250 

.91645 

528 

.6947 

.84182 

578 

.7605 

.88111 

628 

.8263 

•9*7*5 

529 

.6961 

.84264 

579 

.7618 

.88186 

629 

.8276 

.91784 

530 

0.6974 

9.84346 

580 

0.7632 

9.88261 

630 

0.8289 

9.91853 

531 

.6987 

.84428 

581 

.7645 

.88336 

631 

.8303 

.91922 

532 

.7000 

.84510 

582 

.7658 

.88411 

632 

.8316 

.91990 

533 

.7013 

.84591 

583 

.7671 

.88486 

633 

•8329 

.92059 

534 

.7026 

.84673 

584 

.7684 

.88560 

634 

.8342 

.92128 

535 

0.7040 

9.84754 

585 

0.7697 

9.88634 

635 

0.8355 

9.92196 

536 

.7053 

.84835 

586 

.7711 

.88708 

636 

.8368 

.92264 

537 

.7066 

.84916 

587 

.7724 

.88782 

637 

.8382 

.92332 

538 

.7079 

.84997 

588 

.7737 

.88856 

638 

.8395 

.92401 

539 

.7092 

.85078 

589 

•7750 

.88930 

639 

.8408 

.92469 

540 

0.7105 

9-85158 

590 

0.7763 

9.89004 

640 

0.8421 

9.92537 

541 

.7118 

.85238 

591 

.7776 

•89077 

641 

.8434 

.92604 

542 

.7132 

.85318 

592 

.7789 

.89151 

642 

.8447 

.92672 

543 
544 

.7145 
.7158 

.85399 
.85478 

593 
594 

.7803 
.7816 

.89224 
.89297 

643 
644 

.8461 
.8474 

.92740 
.92807 

545 

0.7171 

9.85558 

595 

0.7829 

9.89370 

645 

0.8487 

9.92875 

546 

.7184 

.85638 

596 

.7842 

.89443 

646 

.8500 

.92942 

547 

.7197 

.85717 

597 

.7855 

.89516 

647 

.8513 

.93009 

548 

.7211 

.85797 

598 

.7868 

.89589 

648 

.8526 

.93076 

549 

.7224 

.85876 

599 

.7882 

.89662 

649 

.8539 

.93143 

SMITHSONIAN  TABLES. 


227 


TABLE  86. 

DENSITY    OF   AIR    AT    DIFFERENT    HUMIDITIES   AND    PRESSURES. 

METRIC    MEASURES. 


Values   of 


8 


£-0.378* 


76() 


=  Barometric   pressure   in  mm.;    e=  Vapor   pressure  in   mm. 


h. 

h 

760' 

^ 

h. 

h 

76o* 

^ 

h. 

h 

760' 

^t 

mm. 

—  10 

mm. 

—  10 

mm. 

—  IO 

650 

0.8553 

9.93210 

700 

0.9211 

9.96428 

750 

0.9868 

9.99425 

651 

.8566 

.93277 

701 

.9224 

.96490 

75i 

.9882 

•99483 

652 

•8579 

•93341 

702 

.9237 

.96552 

752 

.9895 

.99540 

653 

.8592 

.93410 

703 

.9250 

.96614 

753 

.9908 

•99598 

654 

.8605 

.93476 

704 

•9263 

.96676 

754 

.9921 

.99656 

655 

0.8618 

9-93543 

705 

0.9276 

9.96738 

755 

0-9934 

9.99713 

656 

.8632 

.93609 

706 

.9289 

.96799 

756 

•9947 

.99771 

657 

.8645 

.93675 

707 

•9303 

.96860 

757 

.9961 

.99828 

658 

.8658 

•93741 

708 

.9316 

.96922 

758 

•9974 

.99886 

659 

.8671 

.93807 

709 

.9329 

.96983 

759 

.9987 

•99943 

660 

0.8684 

9-93873 

710 

0.9342 

9.97044 

760 

1.  0000 

o.ooooo 

66  1 

.8697 

•93939 

711 

•9355 

.97106 

76i 

.0013 

.00057 

662 

.8711 

.94004 

712 

.9368 

.97167 

762 

.0026 

.00114 

663 

.8724 

.94070 

713 

.9382 

.97228 

763 

.0039 

.00171 

664 

.8737 

-94135 

714 

•9395 

.97288 

764 

.0053 

.00228 

665 

0.8750 

9.94201 

715 

0.9408 

9-97349 

765 

1.0066 

0.00285 

666 

.8763 

.94266 

716 

•9421 

.97410 

766 

.0079 

.00342 

667 

.8776 

.94331 

717 

•9434 

.97470 

767 

.0092 

.00398 

668 

.8790 

.94396 

718 

•9447 

•97531 

768 

.0105 

.00455 

669 

.8803 

.94461 

719 

.9461 

.97592 

769 

.0118 

.00511 

670 

0.8816 

9.94526 

720 

0-9474 

9-97652 

770 

1.0132 

0.00568 

671 

.8829 

•94591 

721 

.9487 

.97712 

771 

.0145 

.00624 

672 

.8842 

.94656 

722 

.9500 

-97772 

772 

.0158 

.00680 

673 

•8855 

.94720 

723 

•9513 

.97832 

773 

.0171 

.00736 

674 

.8869 

.94785 

724 

.9526 

.97892 

774 

.0184 

.00793 

675 

0.8882 

9.94849 

725 

0-9539 

9-97952 

775 

1.0197 

0.00849 

676 

.8895 

•949^3 

726 

•9553 

.98012 

776 

.0211 

.00905 

677 

.8908 

.94978 

727 

•9566 

.98072 

777 

.0224 

.00961 

678 

.8921 

.95042 

728 

•9579 

.98132 

778 

.0237 

.01017 

679 

.8934 

.95106 

729 

•9592 

.98191 

779 

.0250 

.01072 

630 

0.8947 

9.95170 

730 

0.9605 

9.98250 

780 

1.0263 

0.01128 

681 

.8960 

.95233 

731 

.9618 

.98310 

781 

.0276 

.01184 

682 

.8974 

.95297 

732 

.9632 

.98370 

782 

.0289 

.01239 

683 

.8987 

.95361 

733 

.9645 

.98429 

783 

.0303 

.01295 

684 

.9000 

.95424 

734 

.9658 

.98488 

784 

.0316 

.01350 

685 

0.9013 

9.95488 

735 

0.9671 

9-98547 

785 

1.0329 

0.01406 

686 

.9026 

.95551 

736 

.9684 

.98606 

786 

.0342 

.01461 

687 

•9°39 

•956i4 

737 

•097 

.98665 

787 

•0355 

.01516 

688 

.9053 

.95677 

738 

.9711 

.98724 

788 

.0368 

.01571 

689 

.9066 

.95740 

739 

.9724 

.98783 

789 

.0382 

.01626 

690 

0.9079 

9.95804 

740 

0.9737 

9.98842 

790 

1.0395 

0.01681 

691 

.9092 

.95866 

741 

•9750 

.98900 

791 

.0408 

.01736 

692 

•9*05 

.95929 

742 

•9763 

.98959 

792 

.O42I 

.01791 

693 

.9118 

.95992 

743 

.9776 

.99018 

793 

•0434 

.01846 

694 

.9132 

.96054 

744 

.9789 

.99076 

794 

.0447 

.01901 

695 

0.9145 

9.96117 

745 

0.9803 

9-99x34 

795 

1.0461 

0.01955 

696 

.9158 

.96180 

746 

.9816 

.99192 

796 

.0474 

.02010 

697 

.9171 

.96242 

747 

.9829 

•99251 

797 

.0487 

.02064 

698 

.9184 

.96304 

748 

.9842 

.99309 

798 

.0500 

.02119 

699 

.9197 

.96366 

749 

.9855 

.99367 

799 

.0513 

.02173 

SMITHSONIAN  TABLES. 


228 


TABLE  87. 

AVOIRDUPOIS    POUNDS   AND    OUNCES    INTO    KILOGRAMMES. 

i  avoirdupois  pound  =  0.4535924  kilogramme, 
i  avoirdupois  ounce  =  0.0283495  kilogramme. 


Pounds. 

.0 

.. 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

kg. 

kg. 

kg. 

kg. 

kg. 

kg. 

kg. 

kg. 

kg. 

kg. 

0 

0.0000 

0.0454 

0.0907 

0.1361 

0.1814 

0.2268 

0.2722 

0.3175 

0.3629 

0.4082 

i 

0.4536 

0.4990 

0-5443 

0.5897 

0.6350 

0.6804 

0.7257 

0.7711 

0.8165 

0.8618 

2 

0.9072 

0.9525 

0.9979 

1-0433 

1.0886 

1.1340 

I.I793 

1.2247 

I.270I 

I.3I54 

3 

1.3608 

I.406I 

I.45I5 

1.4969 

1.5422 

1.5876 

1.6329 

1.6783 

1.7237 

1.7690 

4 

1.8144 

1-8597 

1.9051 

1.9504 

1.9958 

2.0412 

2.0865 

2.1319 

2.1772 

2.2226 

5 

2.2680 

2.3133 

2.3587 

2.4040 

2.4494 

2.4948 

2.5401 

2.5855 

2.6308 

2.6762 

6 

2.7216 

2.7669 

2.8123 

2.8576 

2.9030 

2.9484 

2-9937 

3-0391 

3.0844 

3.1298 

7 

3-1751 

3.2205 

3-2659 

3.3H2 

3-3566 

3-40I9 

3-4473 

34927 

3.5380 

3-5834 

8 

3.6287 

3.6741 

3-7I95 

3.7648 

3.8102 

3-8555 

3-9009 

3.9463 

3.9916 

4.0370 

9 

4.0823 

4.1277 

4.I73I 

4.2184 

4.2638 

4-309I 

4-3545 

4.3998 

4.4452 

4.4906 

Ounces. 

.0 

-' 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

kg. 

kg. 

kg. 

kg. 

kg. 

kg. 

kg. 

kg- 

kg. 

kg. 

0 

0.0000 

0.0028 

0.0057 

0.0085 

O.OII3 

0.0142 

0.0170 

0.0198 

0.0227 

0.0255 

I 

.0283 

.0312 

.0340 

.0369 

.0397 

.0425 

•0454 

.0482 

.0510 

.0539 

2 

.0567 

.0595 

.0624 

.0652 

.0680 

.0709 

•0737 

.0765 

.0794 

.0822 

3 

.0850 

.0879 

.0907 

.0936 

.0964 

.0992 

.1021 

.1049 

.1077 

.Ilo6 

4 

.1134 

.1162 

.1191 

.1219 

.1247 

.1276 

.1304 

.1332 

.1361 

.1389 

5 

0.1417 

o.  1446 

0.1474 

0.1503 

O.I53I 

0.1559 

o.  1588 

0.1616 

0.1644 

0.1673 

6 

.1701 

.1729 

.1758 

.1786 

.1814 

.1843 

.1871 

.1899 

.1928 

.1956 

7 

.1984 

.2013 

.2041 

.2070 

.2098 

.2126 

•2155 

.2183 

.2211 

.2240 

8 

.2268 

.2296 

.2325 

-2353 

•  2381 

.2410 

.2438 

.2466 

•2495 

•2523 

9 

.2551 

.2580 

.2608 

.2637 

.2665 

•  2693 

.2722 

.2750 

.2778 

.2807 

10 

0.2835 

0.2863 

0.2892 

0.2920 

0.2948 

0.2977 

0.3005 

0.3033 

0.3062 

0.3090 

ii 

.3118 

.3147 

-3I75 

.3203 

.3232 

.3260 

.3289 

.3317 

-3345 

•3374 

12 

.3402 

.3430 

•3459 

.3487 

•3515 

•3544 

-3572 

.3600 

.3629 

•3657 

13 

.3685 

.3714 

•3742 

•3770 

•3799 

.3827 

.3856 

.3884 

.3912 

•3941 

14 

.3969 

•3997 

.4026 

.4054 

.4082 

4III 

.4139 

.4167 

.4196 

.4224 

15 

.4252 

.4281 

4309 

•4337 

.4366 

•4394 

.4423 

•4451 

•4479 

.4508 

SNTHSONIAN  TABLES. 


229 


TABLE  88. 

KILOGRAMMES    INTO    AVOIRDUPOIS    POUNDS   AND    OUNCES. 

i  kilogramme  =  2.204622  avoirdupois  pounds. 


Kilo- 

0.0 

O.I 

0.2 

0.3 

0.4 

0.5 

0.6 

0.7 

0.8 

0.9 

grammes. 

Av.  Ibs. 

Av.  Ibs. 

Av. 

Ibs. 

Av.  Ibs. 

Av.  Ibs. 

Av.  Ibs. 

Av.  Ibs. 

Av. 

Ibs. 

Av.  Ibs. 

Av.  Ibs. 

0 

0.000 

0.220 

0.441 

0.661 

0.882 

1.  102 

1.323 

1-543 

] 

[.764 

1.984 

i 

2.205 

2.425 

2. 

646 

2.866 

3.086 

3.307 

3.527 

3.748 

3.968 

4.189 

2 

4.409 

4.630 

4- 

850 

5-071 

5.291 

5.512 

5.732 

5.952 

6.173 

6.393 

3 

6.614 

6.834 

7-055 

7-275 

7.496 

7.716 

7-937 

8.157 

8.378 

8.598 

4 

8.818 

9-039 

9- 

259 

9.480 

9.700 

9.921 

10.141 

10.362 

10.582 

10.803 

5 

11.023 

11.244 

11.464 

11.684 

11.905 

12.125 

12.346 

12.566 

12.787 

13.007 

6 

13.228 

13.448 

13. 

669 

13.889 

14.110 

14.330 

14.551 

14.771 

14.991 

15.212 

7 

15432 

15.653 

IS- 

873 

16.094 

16.314 

16.535 

16.755 

16.976 

17.196 

17.417 

8 

17.637 

17.857 

18.078 

18.298 

18.519 

18.739 

18.960 

19.180 

19.401 

19.621 

9 

19.842 

2O.O62 

20.283 

20.503 

20.723 

20.944 

21.164 

21.385 

21.605 

21.826 

Tenths  of  a  Kilogramme  into 

Ounces. 

Hundredths  of 
into  Decimals  of  a 

a  Kilogramme 
Pound  and  Ounces. 

kg. 

Oz. 

kg. 

Oz. 

kg. 

Av.  Ibs.      Oz. 

kg. 

Av.  Ibs.      Oz. 

O.I 

3.5274 

0.6 

21.1644 

O.OI 

O.O22  =  0.35 

0.06 

0.132  =  2.12 

.2 

7.0548 

•7 

24.6918 

.02 

.044  =  0.71 

•07 

.154  =  2.47 

•3 

10.5822 

.8 

28.2192 

•03 

.066  =  1.06 

.08 

.176  =  2.82 

•4 

14.1096 

•9 

31-7466 

.04 

.088  =  1.41 

.09 

.198  =  3.17 

•5 

17-6370 

I.O 

35-2740 

.05 

.no  =  1.76 

.10 

.220  =  3.53 

TABLE  89. 


GRAINS    INTO    GRAMMES. 

i  grain  =  0.06479892  gramme. 


Grains. 

0 

1 

2 

3 

4 

5 

6 

7 

8 

9 

gram's. 

gram's. 

gram's. 

gram's. 

gram's. 

gram's. 

gram's. 

gram's. 

gram's. 

gram's. 

0 

0.0000 

0.0648 

0.1296 

0.1944 

0.2592 

0.3240 

0.3888 

0.4536 

0.5184 

0.5832 

10 

0.6480 

0.7128 

0.7776 

0.8424 

0.9072 

0.9720 

1.0368 

1.1016 

1.1664 

1.2312 

20 

1.2960 

1.3608 

1.4256 

1.4904 

1-5552 

1.6200 

1.6848 

1.7496 

1.8144 

1.8792 

30 

1.9440 

2.0088 

2.0736 

2.1384 

2.2032 

2.2680 

2.3328 

2.3976 

2.4624 

2.5272 

40 

2.5920 

2.6568 

2.7216 

2.7864 

2.8512 

2.9160 

2.9808 

3.0456 

3.H03 

3.I75I 

50 

3.2399 

3.3047 

3.3695 

3.4343 

34991 

3.5639 

3-6287 

3.6935 

3.7583 

3-8231 

60 

3.8879 

3.9527 

4.0175 

4.0823 

4.1471 

4.2119 

4.2767 

4.3415 

4.4063 

4.4711 

70 

4-5359 

4.6007 

4.6655 

4.7303 

4.7951 

4.8599 

4.9247 

4.9895 

5.0543 

5.H9I 

80 

5.1839 

5.2487 

5.3T35 

5.3783 

5-4431 

5.5079 

5.5727 

5.6375 

5.7023 

5.7671 

90 

5.8319 

5.8967 

5.9615 

6.0263 

6.0911 

6.1559 

6.2207 

6.2855 

6.3503 

6.4I5I 

Tenths  of  a  Grain. 

Hundredths 

of  a  Grain. 

Grain. 

gramme. 

Grain. 

gramme. 

Grain. 

gramme. 

Grain. 

gramme. 

O.I 

0.0065 

0.6 

0.0389 

0,01 

0.0006 

0.06 

0.0039 

.2 

.0130 

.7 

•0454 

.02 

.0013 

.07 

.0045 

•3 

.0194 

.8 

.0518 

•03 

.0019 

.08 

.0052 

•4 

.0259 

•9 

•0583 

.04 

.0026 

.09 

.0058 

•5 

.0324 

I.O 

.0648 

•05 

.0032 

.10 

.0065 

SMITHSONIAN  TABLES. 


230 


GRAMMES    INTO   GRAINS. 

i  gramme  =  15.432351  grains. 


TABLE  90. 


Grammes. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

0 

O.OO 

1-54 

3.09 

4.63 

6.17 

7.72 

9.26 

I0.8o 

12.35 

13.89 

i 

15-43 

16.98 

18.52 

20.06 

21.  6l 

23.15 

24.69 

26.24 

27.78 

29.32 

2 

30.86 

32.41 

33-95 

35-49 

37.04 

38.58 

40.12 

41.67 

43.21 

44-75 

3 

46.30 

47.84 

49.38 

50.93 

52.47 

54-01 

55.56 

57-10 

58.64 

60.19 

4 

61.73 

63.27 

64.82 

66.36 

67.90 

6945 

70.99 

72.53 

74.08 

75.62 

5 

77.16 

78.71 

80.25 

81.79 

83.33 

84.88 

86.42 

87.96 

89.51 

9I'°5 

6 

92-59 

94.14 

95.68 

97.22 

98.77 

100.31 

101.85 

103.40 

104.94 

106.48 

7 

108.03 

109.57 

in.  ii 

112.66 

114.20 

H5.74 

117.29 

118.83 

120.37 

121.92 

8 

123.46 

125.00 

126.55 

128.09 

129.63 

131.18 

132.72 

134.26 

135.80 

137.35 

9 

138.89 

140.43 

141.98 

143.52 

145.06 

146.61 

148.15 

149.69 

I5L24 

152.78 

0 

1 

2 

3 

4 

5 

6 

7 

8 

9 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

0 

0.00 

1543 

30.86 

46.30 

61.73 

77.16 

92.59 

108.03 

123.46 

138.89 

10 

154.32 

169.76 

185.19 

200.62 

216.05 

231.49 

246.92 

262.35 

277.78 

293-21 

20 

308.65 

324.08 

339.51 

354-94 

370.38 

385.81 

401.24 

416.67 

432.11 

447-54 

30 

462.97 

478.40 

493.84 

509.27 

524.70 

540.13 

555.56 

57LOO 

586.43 

601.86 

40 

617.29 

632.73 

648.16 

663.59 

679.02 

694.46 

709.89 

725.32 

740.75 

756.19 

50 

771.62 

787.05 

802.48 

817.91 

833.35 

848.78 

864.21 

879.64 

895.08 

910.51 

60 

925.94 

94L37 

956.81 

972.24 

987.67 

1003.10 

1018.54 

1033.97 

1049.40 

1064.83 

70 

080.26 

1095.70 

IIII.I3 

1126.56 

1141.99 

II5743 

1172.86 

1188.29 

1203.72 

1219.16 

80 

234.59 

1250.02 

1265.45 

1280.89 

1296.32 

I3H.75 

I327.I8 

1342.62 

1358.05 

137348 

90 

388.91 

1404.34 

1419.78 

1435-21 

1450.64 

1466.07 

I48I.5I 

1496.94 

1512.37 

1527.80 

gramme. 

Grain.        gramme.       Grain. 

gramme 

Grain.         gramme.      Grain. 

O.OI 

0.154              0.06              0.926 

O.OOI 

0.015              0.006           0.093 

.02 

.309               .07              1.080 

.002 

.031                .007             .108 

.03 

.463                .oS              1.235 

.003 

.046               .008             .123 

.04 

.617                .09               1.389 

.004 

.062                .009             .139 

.05 

.772                .10               1.543 

.005 

.077                .010             .154 

TABLE 
CONVERSION    OF   UNITS    OF    MAGNETIC    INTENSITY. 


91. 


English  Units. 

Dynes. 

Dynes. 

English    Units. 

1 

0.046  108 

O.I 

2.168  82 

2 

.092216 

.2 

4.33764 

3 

.138  324 

•3 

6.50646 

4 

.184  432 

•4 

8.675  28 

5 

0.230  540 

0.5 

10.844  10 

6 

.276  648 

.6 

13.012  92 

7 

.322  756 

•7 

15.181  74 

8 

.368864 

£ 

17.350  56 

9 

.414972 

•9 

19-519  38 

The  English  unit  of  magnetic  intensity  is  the  force  which  acting  for  i  second 
on  a  unit  of  magnetism,  associated  with  a  mass  of  i  grain,  produces  a 
velocity  of  i  foot  per  second. 

The  C.  G.  S.  unit  of  magnetic  intensity  is  the  dyne  —  the  force  which,  acting  on 
one  gramme  for  one  second,  generates  a  velocity  of  i  centimetre  per  second. 

The  dimensions  of  magnetic  intensity  are 


231 


TABLE  92. 

QUANTITY  OF  RAINFALL  CORRESPONDING  TO  GIVEN    DEPTHS. 


i  inch  of  rainfall  =  22624.0417  imperial  gallons  per  acre. 
=  226613.713  Ibs.  per  acre. 


i  inch  of  rainfall  =  113.3068  tons  per  acre. 

=  72516. 3878  tons  per  sq.  mile. 


Depth 
of 
Rainfall. 

Imperial 
Gallons 
per  acre. 

Tons 
per  square 
Mile. 

Depth 
of 
Rainfall. 

Imperial 
Gall  ons 
per  acre. 

Tons 
per  square 
Mile. 

Depth 
Rai°nfall. 

Imperial 
Gallons 
per  acre. 

Tons 
per  square 
Mile. 

Inches. 

Inches. 

Inches. 

o.oo 





0.20 

4524.80 

I4503-27 

0.40 

9049.61 

29006.55 

.01 

226.24 

725.16 

.21 

4751.04 

15228.44 

.41 

9275-85 

29731.71 

.02 

452.48 

I450-32 

.22 

4977.28 

I5953-60 

.42 

9502  .  09 

30456.88 

•03 

678.72 

2175.49 

•23 

5203-52 

16678.76 

•43 

9728.33 

31182.04 

.04 

904.96 

2900.65 

.24 

5429-77 

I7403-93 

•44 

9954-57 

31907.21 

0.05 

1131.20 

3625.81 

0.25 

5656.01 

18129.09 

0.45 

10180.81 

32632.37 

.06 

1357-  44 

4350.98 

.26 

5882.25 

18854.26 

.46 

10407.05 

33357-53 

.07 
.08 

1583.68 
1809.92 

5076.14 
5801.31 

.27 
.28 

6108.49 
6334-73 

I9579-42 
20304.58 

11 

10633.29 
10859.53 

34082  .  70 
34807.86 

.09 

2036.16 

6526.47 

.29 

6560.97 

21029.75 

•49 

11085.77 

35533-03 

0.10 

2262-40 

725I-63 

0.30 

6787.21 

21754.91 

0.50 

11312.02 

36258.19 

.11 

2488.64 

7976.80 

•3i 

7OI3-45 

22480.08 

.60 

I3574-42 

43509-83 

.12 

2714.88 

8701.96 

-32 

7239.69 

23205.24 

•70 

15836.82 

50761.47 

•  13 

2941.12 

9427.13 

•33 

7465-93 

23930.40 

.80 

18099.23 

58013.11 

.14 

3167.36 

10152.29 

•34 

7692.17 

24655.57 

.90 

20361.63 

65264  74 

0.15 

3393-60 

10877.45 

0.35 

7918.41 

25380.73 

1.00 

22624.04 

72516.38 

.16 

3619.84 

11602.62 

•36 

8144.65 

26105.89 

2.00 

45248.08 

145032.77 

.17 

3846.08 

12327.78 

•37 

8370.89 

26831.06 

3-oo 

67872.12 

217549.16 

.18 

4072.32 

13052.94 

•38 

8597.13 

27^6.22 

4.00 

90496.  i  6 

290065.55 

.19 

4298.56 

13778.11 

-39 

8823.37 

28281.39 

5.00 

113120.20 

362581.93 

0.20 

4524.80 

14503.27 

0.40 

9049.61 

29006.55 

6.00 

135744.24 

435098-32 

TABLE  93. 


DATES    OF    DOVE'S    PENTADES. 


No. 
of 
Pen- 
tade. 

Epoch  of  the 
Year. 

No. 
of 
Pen- 
tade 

Epoch  of  the 
Year. 

No. 
of 
Pen- 
tade 

Epoch  of  the 
Year. 

No. 
of 
Pen- 
tade 

Epoch  of  the 
Year. 

, 

Jan.    i  to       5 

19 

Apr.    i  to        5 

37 

June  30  to  July  4 

55 

Sept.  28  to  Oct.  2 

2 

6          10 

20 

6           10 

38 

July    5              9 

56 

Oct.    3               7 

3 

ii          15 

21 

ii           15 

39 

10            14 

57 

8                12 

4 

16          20 

22 

16           20 

40 

15             19 

58 

13            17 

5 

Jan.  21  to     25 

23 

Apr.  21  to      25 

41 

July  20  to       24 

59 

Oct.  18  to       22 

6 

26          30 

24 

26           30 

42 

25            29 

60 

23         27 

8 

31  Feb.  4 
Feb.    5           9 

25 
26 

May    i             5 
6           10 

43 
44 

30  Aug.  3 
Aug.   4             8 

61 
62 

28  Nov.  i 
Nov.  2             6 

9 

10          14 

27 

ii           15 

45 

9            13 

63 

7           ii 

10 

Feb.  15  to     19 

28 

May  1  6  to      20 

46 

Aug.  14  to        18 

64 

Nov.  12  to       16 

ii 

20         24 

29 

21           25 

47 

19            23 

65 

17                21 

12* 

25  Mar.  i 

30 

26           30 

48 

24            28 

66 

22                26 

13 

Mar.   2           6 

3i 

31  June  4 

49 

29    Sept.  2 

67 

27    Dec.  i 

14 

7          ii 

32 

June   5            9 

50 

Sept.  3             7 

68 

Dec.   2             6 

69 

7            ii 

15 

Mar.  12  to     16 

33 

June  10  to       14 

51 

Sept.   8  to        12 

70 

12            16 

16 

17          21 

34 

15           19 

52 

13            17 

7i 

17                21 

17 

22              26 

35 

20               24 

53 

l8                 22 

72 

22                26 

18 

27       31 

36 

25               29 

54 

23        27 

73 

27                31 

*  In  the  bissextile  year  the  i2th  peutade  contains  six  days. 
232 


TABLE  94 
DIVISION    BY    28    OF    NUMBERS    FROM    28   TO    867972. 


0 

100 

200 

300 

400 

500 

600 

700 

800 

900 

o 

28 

56 

84 

112 

140 

168 

196 

224 

252 

D. 

oo 

28 

56 

84 

840 

Q. 

00 

01 

02 

03 

30 

i 

29 

57 

85 

"3 

141 

169 

197 

225 

253 

D. 

12 

40 

68 

96 

812 

Q. 

04 

05 

06 

07 

29 

2 

30 

58 

86 

114 

142 

170 

198 

226 

254 

D. 

24 

52 

80 

784 

Q. 

08 

09 

10 

28 

3 

31 

59 

87 

"5 

143 

171 

199 

227 

255 

D. 

08 

36 

64 

92 

756 

Q. 

II 

12 

13 

14 

27 

4 

32 

60 

88 

116 

144 

172 

200 

228 

256 

D. 

20 

48 

76 

728 

Q. 

15 

16 

17 

26 

5 

33 

61 

89 

117 

145 

173 

2OI 

229 

257 

D. 

04 

32 

60 

88 

700 

Q. 

18 

19 

20 

21 

25 

6 

34 

62 

90 

118 

146 

174 

202 

230 

258 

D. 

16 

44 

72 

672 

Q. 

22 

23 

24 

24 

7 

35 

63 

91 

119 

147 

175 

203 

231 

259 

D. 

oo 

28 

56 

84 

644 

Q. 

25 

26 

27 

28 

23 

8 

36 

64 

92 

1  20 

148 

176 

204 

232 

260 

D. 

12 

40 

68 

96 

616 

Q. 

29 

30 

31 

32 

22 

9 

37 

65 

93 

121 

149 

177 

205 

233 

261 

D. 

24 

52 

80 

588 

Q. 

33 

34 

35 

21 

10 

38 

66 

94 

122 

150 

178 

206 

234 

262 

D. 

08 

36 

64 

92 

560 

Q. 

36 

37 

38 

39 

20 

n 

39 

67 

95 

123 

151 

179 

207 

235 

263 

D. 

20 

48 

76 

532 

Q. 

40 

41 

42 

19 

0 

100 

200 

300 

400 

500 

600 

700 

800 

900 

*>£' 

12 

40 

68 

96 

124 

152 

180 

208 

236 

264 

D. 

04 

32 

60 

88 

504 

Q. 

43 

44 

45 

46 

18 

13 

41 

69 

97 

125 

153 

181 

209 

237 

265 

D. 

16 

44 

72 

476 

Q. 

47 

48 

49 

17 

14 

42 

70 

98 

126 

154 

182 

210 

238 

266 

D. 

00 

28 

56 

84 

448 

Q. 

50 

51 

52 

53 

16 

15 

43 

71 

99 

127 

155 

183 

211 

239 

267 

D. 

12 

40 

68 

96 

420 

Q. 

54 

55 

56 

57 

15 

16 

44 

72 

IOO 

128 

156 

184 

212 

240 

268 

D. 

24 

52 

80 

392 

Q. 

58 

59 

60 

14 

17 

45 

73 

101 

129 

157 

185 

213 

241 

269 

D. 

08 

36 

64 

92 

364 

Q. 

61 

62 

63 

64 

13 

18 

46 

74 

102 

130 

158 

186 

214 

242 

270 

D. 

20 

48 

76 

336 

Q. 

65 

66 

67 

12 

19 

47 

75 

103 

131 

159 

187 

215 

243 

271 

D. 

04 

32 

60 

88 

308 

Q. 

68 

69 

70 

71 

II 

20 

48 

76 

IO4 

132 

160 

188 

216 

244 

272 

D. 

16 

44 

72 

280 

Q. 

72 

73 

74 

10 

21 

49 

77 

105 

133 

161 

189 

217 

245 

273 

D. 

00 

28 

56 

84 

252 

Q. 

75 

76 

77 

78 

9 

22 

50 

78 

106 

134 

162 

190 

218 

246 

274 

D. 

12 

40 

68 

96 

224 

Q. 

79 

80 

81 

82 

8 

23 

51 

79 

107 

135 

163 

191 

219 

247 

275 

D. 

24 

52 

80 

196 

Q. 

83 

84 

85 

7 

24 

52 

80 

108 

136 

164 

192 

220 

248 

276 

D. 

08 

36 

64 

92 

168 

Q. 

86 

87 

88 

89 

6 

25 

53 

81 

109 

137 

165 

193 

221 

249 

277 

D. 

20 

48 

76 

140 

Q. 

90 

91 

92 

5 

26 

54 

82 

no 

138 

166 

194 

222 

250 

278 

D. 

04 

32 

60 

88 

112 

Q. 

93 

94 

95 

96 

4 

27 

55 

83 

in 

139 

167 

195 

223 

251 

279 

D. 

16 

44 

72 

84 

0 

100 

200 

300 

400 

500 

600 

700 

800 

900 

Q. 

97 

98 

99 

3 

SMITHSONIAN  TABLES* 


233 


TABLE  95. 

DIVISION    BY    29    OF    NUMBERS    FROM    29   TO    898971 


0 

100 

200 

300 

400 

500 

600 

700 

800 

900 

0 

29 

58 

87 

116 

145 

174 

203 

232 

261 

D. 

oo 

29 

58 

87 

870 

Q. 

00 

01 

02 

03 

30 

I 

30 

59 

88 

117 

146 

175 

204 

233 

262 

D. 

16 

45 

74 

841 

§. 

04 

05 

06 

29 

2 

31 

60 

89 

118 

147 

176 

205 

234 

263 

03 

32 

61 

90 

812 

Q. 

07 

08 

09 

10 

28 

3 

32 

61 

90 

119 

148 

177 

206 

235 

264 

D. 

19 

48 

77 

783 

Q. 

1  1 

12 

13 

27 

4 

33 

62 

91 

120 

149 

178 

207 

236 

265 

D. 

06 

35 

64 

93 

754 

Q. 

14 

15 

16 

17 

26 

5 

34 

63 

92 

121 

150 

179 

208 

237 

266 

D. 

22 

5i 

80 

725 

Q. 

18 

19 

20 

25 

6 

35 

64 

93 

122 

151 

180 

209 

238 

267 

D. 

09 

38 

67 

96 

696 

Q. 

2  1 

22 

23 

24 

24 

7 

36 

65 

94 

123 

152 

181 

2IO 

239 

268 

D. 

25 

54 

83 

667 

Q. 

25 

26 

27 

23 

8 

37 

66 

95 

124 

153 

182 

211 

240 

269 

D. 

12 

41 

70 

99 

638 

Q. 

28 

29 

30 

31 

22 

9 

38 

67 

96 

125 

154 

183 

212 

241 

270 

D. 

28 

57 

86 

609 

Q. 

32 

33 

34 

21 

10 

39 

68 

97 

126 

155 

184 

213 

242 

271 

D. 

15 

44 

73 

580 

Q. 

35 

36 

37 

20 

n 

40 

69 

98 

127 

156 

185 

214 

243 

272 

D. 

02 

31 

60 

89 

551 

Q. 

38 

39 

40 

41 

19 

12 

41 

70 

99 

128 

157 

186 

215 

244 

273 

D. 

18 

47 

76 

522 

Q. 

42 

43 

44 

18 

13 

42 

71 

100 

129 

158 

187 

216 

245 

274 

D. 

05 

34 

63 

92 

493 

Q. 

45 

46 

47 

48 

17 

14 

43 

72 

101 

I30 

159 

188 

217 

246 

275 

D. 

21 

50 

79 

464 

0 

100 

200 

300 

400 

500 

600 

700 

800 

900 

Q. 

49 

50 

51 

16 

15 

44 

73 

102 

I3I 

160 

189 

218 

247 

276 

D. 

08 

37 

66 

95 

435 

• 

Q. 

52 

53 

54 

55 

15 

16 

45 

74 

103 

132 

161 

190 

219 

248 

277 

D. 

24 

53 

82 

406 

Q. 

56 

57 

58 

14 

17 

46 

75 

104 

133 

162 

191 

220 

249 

278 

D. 

n 

40 

69 

98 

377 

Q- 

59 

60 

61 

62 

13 

18 

47 

76 

105 

134 

163 

192 

221 

250 

279 

D. 

27 

56 

85 

348 

Q. 

63 

64 

65 

12 

19 

48 

77 

106 

135 

164 

193 

222 

251 

280 

D. 

14 

43 

72 

319 

Q. 

66 

67 

68 

II 

20 

49 

78 

107 

136 

165 

194 

223 

252 

281 

D. 

01 

30 

59 

88 

290 

Q. 

69 

70 

71 

72 

10 

21 

50 

79 

108 

137 

166 

195 

224 

253 

282 

D. 

17 

46 

75 

261 

Q. 

73 

74 

75 

9 

22 

51 

80 

109 

138 

167 

196 

225 

254 

283 

D. 

04 

33 

62 

91 

232 

Q. 

76 

77 

78 

79 

8 

23 

52 

81 

no 

139 

168 

197 

226 

255 

284 

D. 

20 

49 

78 

203 

Q. 

80 

81 

82 

7 

24 

53 

82 

in 

140 

169 

198 

227 

256 

285 

D. 

Q. 

07 
83 

36 
84 

65 
85 

146 

174 
6 

25 

54 

83 

112 

141 

170 

199 

228 

257 

286 

D. 

23 

52 

81 

145 

Q. 

87 

88 

89 

5 

26 

55 

84 

113 

142 

171 

200 

229 

258 

287 

D. 

10 

39 

68 

97 

116 

Q. 

90 

91 

92 

93 

4 

27 

56 

85 

114 

143 

172 

201 

230 

259 

288 

D. 

26 

55 

84 

87 

Q. 

94 

95 

96 

3 

28 

57 

86 

115 

144 

173 

202 

231 

260 

289 

D. 

13 

42 

58 

0 

100 

200 

300 

400 

500 

600 

700 

800 

900 

Q. 

97 

98 

99 

2 

SMITHSONIAN  TABLES. 


234 


DIVISION    BY  31  OF  NUMBERS  FROM  31 


TABLE  96. 
TO  960969. 


0 

100 

200 

300 

400 

500 

600 

700 

800 

900 

i 

0 

i 

2 

3 

31 
32 

33 
34 

62 

63 
64 
65 

93 
94 
95 
96 

124 
125 
126 

127 

155 
156 

157 
158 

186 
187 
188 
189 

217 
218 
219 

220 

248 

249 
250 

251 

279 
280 
281 

282 

D. 

Q. 

D. 

Q. 

D. 

Q. 

D. 

Q. 

00 

00 

24 

04 

17 

07 

10 

10 

3i 
01 
55 
05 
48 
08 

4i 
II 

62 
02 
86 
06 

79 
09 
72 
12 

93 
03 

930 
30 
899 
29 
868 
28 
837 
27 

4 
5 
6- 

7 

35 
36 
37 
38 

66 
67 
68 
69 

97 
98 
99 

100 

128 
129 
130 
131 

159 
160 
161 
162 

190 
191 
192 
193 

221 
222 
223 
224 

252 
253 
254 
255 

283 
284 
285 
286 

D. 

Q. 

D. 

Q. 

D. 

Q. 

D. 

Q. 

°3 

27 

17 

20 

20 

13 
23 

34 
14 
58 
18 
5i 
21 

44 
24 

65 
15 

89 
19 
82 
22 
75 
25 

?66 

806 
26 
775 
25 
744 
24 

713 
23 

8 
9 

10 

ii 

39 
40 

4i 
42 

70 
7i 

72 
73 

101 
102 
I03 
104 

132 
133 
134 
135 

163 
164 

165 
166 

194 

195 
196 
197 

225 
226 
227 

228 

256 
257 
258 
259 

287 
288 
289 
290 

D. 

a 

D. 

Q. 

D. 

Q. 

D. 

Q. 

06 
26 
30 
30 

23 
33 
16 
36 

37 
27 
61 
31 
54 
34 

47 
37 

68 
28 
92 
32 

85 
35 
78 
38 

2"9 

682 
22 

651 
21 
620 
20 
589 
19 

12 
13 
14 
15 

43 
44 
45 
46 

74 
75 
76 
77 

105 

106 
107 
108 

136 
137 
138 
139 

167 
168 
169 
170 

198 
199 
200 

201 

229 
230 
231 
232 

260 
261 
262 
263 

291 
292 

293 

294 

D. 

Q. 

D. 

Q. 

D. 

Q. 

D. 

09 
39 

02 

42 

26 
46 
19 

40 
40 

ii 

57 
47 
50 

7i 
41 

64 
44 
88 
48 
81 

95 
45 

558 
18 
527 
17 
496 
16 
465 

0 

100 

200 

300 

400 

500 

600 

700 

800 

900 

Q. 

49 

50 

51 

15 

16 

17 
18 

19 

47 
48 

49 
50 

78 

79 
80 
81 

109 
no 
in 

112 

140 
141 
142 
143 

171 
172 
173 

174 

202 
203 
204 
205 

233 
234 
235 
236 

264 
265 
266 
267 

295 
296 

297 
298 

D. 

Q. 

D. 

Q. 

D. 

Q. 

D. 

Q. 

12 

52 

05 
55 

29 
59 

22 

62 

43 
53 
36 
56 
60 
60 

53 
63 

74 
54 

67 
57 

9i 
61 
84 
64 

98 
58 

434 
14 

403 
13 
372 
12 
34i 
II 

20 
21 
22 
23 

5i 
52 

53 
54 

82 

83 
84 
85 

"3 
114 

"5 

116 

144 

145 
146 

147 

175 
176 
177 

178 

206 
207 
208 
2O9 

237 
238 

239 
240 

268 
269 
270 
271 

299 
300 
301 
302 

D. 

Q. 

D. 

Q. 

D. 

Q. 

D. 

Q. 

15 
65 
08 
68 

01 

71 

25 
75 

46 
66 

39 
69 

732 
56 
76 

77 
67 
70 
70 
63 
73 
87 
77 

94 
74 

310 
10 

279 
9 
248 
8 
217 
7 

24 

25 
26 
27 

55 
56 

57 
58 

86 

87 
88 

89 

117 

118 
119 

120 

148 
149 
150 
151 

179 
180 
181 
182 

2IO 
211 
212 
213 

241 

242 

243 
244 

272 

273 

274 

275 

303 
304 
305 
306 

D. 

g: 

Q. 

D. 

Q. 

D. 

Q. 

18 
78 
ii 
81 
04 
84 
28 
88 

49 
79 
42 
82 
35 
85 

59 
89 

80 
80 
73 
83 
66 
86 
90 
90 

97 
87 

1  86 
6 

155 
5 
124 
4 

1 

28 
29 
30 

59 
60 
61 

90 

9i 
92 

121 
122 
I23 

152 

153 
154 

183 
184 

185 

214 
215 

216 

245 
246 

247 

276 

277 
278 

307 
308 
309 

D. 

Q. 

D. 

Q. 

D. 

21 

91 

14 
94 

07 

52 
92 
45 
95 

38 

83 
93 
76 
96 

69 

62 
2 

3i 

0 

100 

200 

300 

400 

500 

600 

700 

800 

900 

Q. 

97 

98 

99 

SMITHSONIAN  TABLES. 


235 


TABLE  97. 


NATURAL  SINES  AND   COSINES. 
Natural   Sines. 


Prop. 

Angle. 

0' 

10' 

20' 

30' 

40' 

50' 

60' 

Angle. 

Parts 

for!'. 

0° 

.0000  oo 

.0029  09 

.0058  18 

.0087  27 

.0116  35 

.0145  44 

.0174  52 

89° 

i 

.0174  52 

.0203  6 

.0232  7 

.0261  8 

.0290  8 

.0319  9 

.0349  o 

88 

2 

.0349  o 

.0378  i 

.0407  i 

.0436  2 

•0465  3 

.0494  3 

.0523  4 

87 

3 

•0523  4 

•0552  4 

.0581  4 

.0610  5 

•0639  5 

.0668  5 

.0697  6 

86 

4 

.0697  6 

.0726  6 

•0755  6 

.0784  6 

.0813  6 

.0842  6 

.0871  6 

85 

5 

.0871  6 

.09005 

.0929  5 

•0958  5 

.0987  4 

.1016  4 

•1045  3 

84 

6 

•1045  3 

.10742 

.1103  i 

.1132  o 

.1160  9 

.11898 

.1218  7 

83 

7 

.1218  7 

.12476 

.12764 

.13053 

•I334 

•  1363 

.1392 

82 

8 

.1392 

.1421 

.1449 

.1478 

•  1507 

.1536 

.1564 

81 

2-9 

9 

.1564 

•1593 

.1622 

.1650 

.1679 

.1708 

•1736 

80 

2-9 

10 

.1736 

•  1765 

.1794 

.1822 

.1851 

.1880 

.1908 

79 

2-9 

ii 

.1908 

.1937 

.I965 

.1994 

.2022 

.2051 

.2079 

78 

2.9 

12 

.2079 

.2108 

.2136 

.2164 

.2193 

.2221 

.2250 

77 

2.8 

13 

.2250 

.2278 

.2306 

•2334 

.2363 

.2391 

.2419 

70 

2.8 

14 

.2419 

.2447 

.2476 

.2504 

•  2532 

.2560 

.2588 

75 

2.8 

15 

.2588 

.2616 

.2644 

.2672 

.2700 

.2728 

.2756 

74 

2.8 

16 

.2756 

.2784 

.2812 

.2840 

.2868 

.2896 

.2924 

73 

2.8 

17 

.2924 

.2952 

.2979 

.3007 

.3035 

.3062 

.3090 

72 

2.8 

18 

.3090 

.3118 

•3M5 

.3173 

.3201 

.3228 

-3256 

7i 

2.8 

19 

•3256 

•3283 

•3311 

.3338 

•3365 

•3393 

•3420 

70 

2.7 

20 

.3420 

.3448 

•3475 

•  3502 

.3529 

•3557 

.3584 

69 

2.7 

21 

.3584 

.3611 

.3638 

.3665 

.3692 

•3719 

.3746 

68 

2.7 

22 

.3746 

•3773 

.3800 

.3827 

.3854 

•3881 

.3907 

67 

2.7 

23 

•  39°7 

•3934 

.3961 

.3987 

.4014 

.4041 

.4067 

66 

2.7 

24 

.4067 

.4094 

.4120 

.4147 

.4173 

.4200 

.4226 

65 

2.7 

25 

.4226 

.4253 

.4279 

.4305 

•4331 

•4358 

.4384 

64 

2.6 

26 

.4384 

.4410 

.4436 

.4462 

.4488 

•4514 

•4540 

63 

2.6 

27 

•4540 

•4566 

.4592 

.4617 

•4643 

.4669 

•4695 

62 

2.6 

28 

.4695 

.4720 

.4746 

•4772 

•4797 

.4823 

.4848 

61 

2.6 

29 

.4848 

.4874 

.4899 

.4924 

•4950 

•4975 

.5000 

60 

2.5 

30 

.5000 

•5025 

•5050 

.5075 

.5100 

•5125 

•5150 

59 

2.5 

3i 

•5150 

.5175 

.5200 

•5225 

•  5250 

•5275 

•5299 

58 

2.5 

32 

•5299 

•5324 

.5348 

•5373 

.5398 

.5422 

.5446 

57 

2.5 

33 

.5446 

•5471 

•5495 

.5519 

•5544 

.5568 

•5592 

56 

2.4 

34 

•5592 

.5616 

.5640 

•5664 

.5688 

•5712 

.5736 

55 

2.4 

35 

.5736 

.5760 

.5783 

.5807 

.5831 

.5854 

•5878 

54 

2.4 

36 

.5878 

•5901 

•5925 

.5948 

•  5972 

•5995 

.6018 

53 

2.3 

37 

.6018 

.6041 

.6065 

.6088 

.6111 

.6134 

.6i57 

52 

2.3 

38 

•6157 

.6180 

.6202 

.6225 

.6248 

.6271 

.6293 

5i 

2.3 

39 

.6293 

.6316 

•6338 

.6361 

.6383 

.6406 

.6428 

50 

2.3 

40 

.6428 

.6450 

.6472 

.6494 

•6517 

•6539 

.6561 

49 

2.2 

4i 

.6561 

•6583 

.6604 

.6626 

.6648 

.6670 

.6691 

48 

2.2 

42 

.6691 

.6713 

•6734 

.6756 

.6777 

.6799 

.6820 

47 

2.2 

43 

.6820  ' 

.6841 

.6862 

.6884 

.6905 

.6926 

.6947 

46 

2.1 

44 

.6947 

.6967 

.6988 

.7009 

.7030 

.7050 

.7071 

45 

2.1 

60' 

50' 

40' 

30' 

20' 

10' 

0' 

Angle. 

SMITHSONIAN  TABLES. 


Natural   Cosines. 
236 


NATURAL  SINES  AND   COSINES. 
Natural   Sines. 


TABLE  97. 


Prop. 

Angle. 

0' 

10' 

20' 

30' 

40' 

50' 

60' 

Angle. 

Parts 

forl'. 

45° 

.7071 

.7092 

.7112 

.7133 

•7153 

•7173 

•7193 

44° 

2.0 

46 

•7193 

.7214 

•7234 

.7254 

•7274 

.7294 

•7314 

43 

2.0 

47 

.7314 

•7333 

•7353 

•  7373 

•7392 

.7412 

•7431 

42 

2.0 

48 

•7431 

•7451 

.7470 

.7490 

•  7509 

.7528 

•7547 

4i 

1.9 

49 

•7547 

.7566 

.7585 

.7604 

.7623 

.7642 

.7660 

40 

1-9 

50 

.7660 

.7679 

.7698 

.7716 

•7735 

•  7753 

.7771 

39 

1.9 

5i 

.7771 

.7790 

.7808 

.7826 

.7844 

.7862 

.7880 

38 

1.8 

52 

.7880 

.7898 

.7916 

•7934 

•  7951 

.7969 

.7986 

37 

1.8 

53 

.7986 

.8004 

.8021 

.8039 

.8056 

•8073 

.8090 

36 

i-7 

54 

.8090 

.8107 

.8124 

.8141 

.8158 

.8i75 

.8192 

35 

i-7 

55 

.8192 

.8208 

.8225 

.8241 

.8258 

.8274 

.8290 

34 

1.6 

56 

.8290 

.8307 

•8323 

.8339 

•8355 

•8371 

.8387 

33 

1.6 

57 

.8387 

.8403 

.8418 

.8434 

.8450 

.8465 

.8480 

32- 

1.6 

58 

.8480 

.8496 

.8511 

.8526 

•  8542 

•8557 

•8572 

3i 

i-5 

59 

.8572 

.8587 

.8601 

.8616 

.8631 

.8646 

.8660 

30 

i-5 

60 

.8660 

.8675 

.8689 

.8704 

.8718 

.8732 

.8746 

29 

1.4 

61 

.8746 

.8760 

.8774 

.8788 

.8802 

.8816 

.8829 

28 

1.4 

62 

.8829 

.8843 

.8857 

.8870 

.8884 

.8897 

.8910 

27 

1.4 

63 

.8910 

.8923 

•8936 

.8949 

.8962 

.8975 

.8988 

26 

i-3 

64 

.8988 

.9001 

.9013 

.9026 

.9038 

•9051 

.9063 

25 

i-3 

65 

.9063 

•9°75 

.9088 

.9100 

.9112 

.9124 

•9*35 

24 

1.2 

66 

9*35 

.9147 

•9159 

.9171 

.9182 

.9194 

.9205 

23 

1.2 

67 

.9205 

.9216 

.9228 

•9239 

.9250 

.9261 

.9272 

22 

I.I 

68 

.9272 

.9283 

.9293 

.9304 

.9315 

•9325 

•9336 

21 

I.I 

69 

•9336 

.9346 

-9356 

.9367 

•9377 

.9387 

•9397 

20 

I.O 

70 

•9397 

.9407 

•9417 

.9426 

•9436 

.9446 

•9455 

19 

1.0 

7i 

•9455 

.9465 

•9474 

.9483 

.9492 

.9502 

•9511 

18 

0.9 

72 

•9511 

.9520 

.9528 

•9537 

•9546 

•9555 

•9563 

17 

0.9 

73 

•9563 

•  9572 

.9580 

•9588 

.9596 

.9605 

.9613 

16 

0.8 

74 

.9613 

.9621 

.9628 

.9636 

.9644 

.9652 

.9659 

15 

0.8 

75 

•9659 

.9667 

.9674 

.9681 

.9689 

.9696 

•9703 

14 

0.7 

76 

•9703 

.9710 

.9717 

.9724 

•9730 

•9737 

•9744 

13 

0.7 

77 

•9744 

•9750 

•9757 

•9763 

.9769 

•9775 

.978i 

12 

0.6 

78 

.9781 

.9787 

•9793 

•9799 

.9805 

.9811 

.9816 

II 

0.6 

79 

.9816 

«9«22 

.9827 

.9833 

.9838 

.9843 

.9848 

10 

0-5 

80 

.9848 

.9853 

.9858 

.9863 

.9868 

.9872 

.9877 

9 

0.5 

Si 

.9877 

.9881 

.9886 

.9890 

.9894 

•9899 

•9903 

8 

0.4 

82 

.9903 

.9907 

.9911 

.9914 

.9918 

.9922 

•9925 

7 

0.4 

83 

.9925 

.9929 

•9932 

•  9936 

•9939 

•  9942 

•9945 

6 

o-3 

84 

•9945 

.9948 

•9951 

•9954 

•9957 

•9959 

.9962 

5 

0-3  • 

85 

.9962 

.9964 

.9967 

.9969 

.9971 

•9974 

.9976 

4 

O.2 

86 

.9976 

.9978 

.9980 

.9981 

.9983 

•9985 

.9986 

3 

O.2 

87 

.9986 

.9988 

.9989 

.9990 

•9992 

•9993 

•9994 

2 

O.I 

88 

•9994 

•9995 

.9996 

•9997 

•9997 

.9998 

.9998 

I 

O.I 

89 

.9998 

•9999 

•9999 

I.OOOO 

I.OOOO 

I.OOOO 

I.OOOO 

0 

O.O 

60' 

50' 

40' 

30/ 

20' 

10' 

0' 

Angle. 

SMITHSONIAN  TABLES. 


Natural   Cosines. 
237 


TABLE  98. 


NATURAL   TANGENTS   AND    COTANGENTS. 
Natural    Tangents. 


Angle. 

0' 

10' 

20' 

30' 

40' 

50' 

60'  . 

Angle. 

Prop.  Parts 
for  1'. 

0° 

.00000 

.00291 

.00582 

.00873 

.01164 

•0145  5 

.01746 

89° 

2.9 

i 

.0174  6 

.0203  6 

.0232  8 

.0261  9 

.0291  o 

.0320  i 

.0349  2 

88 

2.9 

2 

.0349  2 

.03783 

.0407  5 

.0436  6 

.0465  8 

•0494  9 

.0524  I 

87 

2-9 

3 

.0524  i 

•0553  3 

.0582  4 

.0611  6 

.0640  8 

.0670  o 

.0699  3 

86 

2.9 

4 

.06993 

.0728  5 

.07578 

.0787  o 

.08163 

.0845  6 

.0874  9 

85 

2.9 

5 

.0874  9 

.0904  2 

.0933  5 

.0962  9 

•0992  3 

.1021  6 

.10510 

84 

2.9 

6 

.1051  o 

.10805 

.11099 

•II394 

.11688 

.11983 

.12278 

83 

2.9 

7 

.1227  8 

•12574 

.12869 

4$l65 

.1346 

.1376 

.1405 

82 

3-° 

8 

.1405 

.1435 

.1465 

•1495 

•1524 

.1554 

.1584 

81 

3-o 

9 

.1584 

.1614 

.1644 

.1673 

.1703 

•1733 

.1763 

80 

3-o 

10 

.1763 

•1793 

.1823 

•1853 

.1883 

.1914 

.1944 

79 

3-o 

ii 

.1944 

.1974 

.2004 

•2035 

.2065 

.2095 

.2126 

78 

3-0 

12 

.2126 

.2156 

.2186 

.2217 

•2247 

.2278 

•2309 

77 

3-1 

13 

.2309 

•2339 

.2370 

.2401 

.2432 

.2462 

•2493 

76 

3-i 

14 

•2493 

.2524 

•2555 

.2586 

.2617 

.2648 

.2679 

75 

3-1 

15 

.2679 

.2711 

.2742 

•2773 

.2805 

.2836 

.2867 

74 

3-1 

16 

.2867 

.2899 

.2931 

.2962 

•2994 

.3026 

•3057 

73 

3-2 

17 

.3057 

.3089 

.3121 

•3153 

•3185 

.3217 

•3249 

72 

3-2 

18 

•3249 

.3281 

.3314 

.3346 

.3378 

.3411 

•3443 

7i 

3-2 

19 

•3443 

.3476 

.3508 

•3541 

•3574 

.3607 

.3640 

7o 

3-3 

20 

.3640 

.3673 

.3706 

•3739 

•3772 

•3805 

•3839 

69 

3-3 

21 

.3839 

.3872 

.3906 

•3939 

•3973 

.4006 

.4040 

68 

34 

22 

.4040 

.4074 

.4108 

.4142 

.4176 

.4210 

4245 

67 

34 

23 

4245 

4279 

4314 

4348 

4383 

.4417 

4452 

66 

3-5 

24 

•4452 

.4487 

4522 

4557 

4592 

.4628 

.4663 

65 

3-5 

25 

.4663 

.4699 

4734 

4770 

.4806 

.4841 

.4877 

64 

3-6 

26 

.4877 

4913 

4950 

.4986 

.5022 

•5059 

•5095 

:  63 

3-6 

27 

.5095 

•5132 

•5169 

.5206 

.5243 

.5280 

•5317 

1  62 

3-7 

28 

.5317 

•5354 

•5392 

•5430 

.5467 

.5505 

•5543 

61 

3-8 

29 

•5543 

.558i 

•5619 

•5658 

.5696 

•5735  - 

•5774 

60 

3-8 

30 

•5774 

.5812 

.5851 

.5890 

•5930 

•5969 

.6009 

59 

3-9 

3i 

.6009 

.6048 

.6088 

.6128 

.6168 

.6208 

.6249 

58 

4.0 

32 

.6249 

.6289 

.633° 

.6371 

.6412 

•6453 

.6494 

57 

4.1 

33 

.6494 

.6536 

.6577 

.6619 

.6661 

.6703 

.6745 

56 

4.2 

34 

•6745 

.6787 

.6830 

.6873 

.6916 

.6959 

.7002 

55 

4-3 

35 

.7002 

.7046 

.7089 

•7133 

.7177 

.7221 

.7265 

54 

44 

36 

.7265 

.7310 

•7355 

.7400 

•7445 

.7490 

•7536 

53 

4-5 

37 

.7536 

.758i 

.7627 

.7673 

.7720 

.7766 

.7813 

52 

4.6 

38 

•7813 

.7860 

.7907 

•7954 

.8002 

.8050 

.8098 

5i 

4-7 

39 

.8098 

.8146 

.8195 

.8243 

.8292 

.8342 

•8391 

50 

4-9 

40 

.8391 

.8441 

.8491 

.8541 

•8591 

.8642 

•8693 

49 

5-0 

4i 

.8693 

.8744 

.8796 

.8847 

.8899 

•8952 

.9004 

48 

5-2 

42 

.9004 

•9°57 

.9110 

.9163 

.9217 

.9271 

.9325 

47 

54 

43 

•9325 

.9380 

•9435 

•9490 

•9545 

.9601 

•9657 

46 

5-5 

44 

.9657 

.9713 

.9770 

•9827 

.9884 

.9942 

1.  0000 

45 

5-7 

60' 

50/ 

40' 

30' 

20' 

10' 

0' 

Angle. 

Natural    Cotangents 
238 


TABLE  98, 


NATURAL   TANGENTS  AND    COTANGENTS. 
Natural    Tangents. 


Angle. 

0' 

10' 

20' 

30' 

40' 

50/ 

60' 

Angle. 

Prop.  Parts 
for  1'. 

45° 

1.  0000 

1.0058 

1.0117 

1.0176 

1.0235 

•0295 

•0355 

44° 

5-9 

46 

1.0355 

1.0416 

1.0477 

1.0538 

1-0599 

.0661 

.0724 

43 

6.1 

47 

1.0724 

1.0786 

1.0850 

1.0913 

1.0977 

.1041 

.1106 

42 

6.4 

48 

1.1106 

1.1171 

1.1237 

1.1303 

1.1369 

.1436 

.1504 

4i 

6.6 

49 

1.1504 

I-I57I 

1.1640 

1.1708 

1.1778 

•1847 

.1918 

40 

6-9 

50 

1.1918 

1.1988 

1.2059 

1.2131 

1.2203 

.2276 

.2349 

39 

7-2 

5i 

1-2349 

1.2423 

1.2497 

1.2572 

1.2647 

.2723 

.2799 

38 

7-5 

52 

1.2799 

1.2876 

1-2954 

1.3032 

1.3111 

.3190 

.3270 

37 

7-9 

53 

1.3270 

T-335I 

1.3432 

I.35I4 

1-3597 

.3680 

.3764 

36 

8.2 

54 

1.3764 

1.3848 

1-3934 

1.4019 

1.4106 

I.4I93 

.4281 

35 

86 

55 

1.4281 

1-4370 

1.4460 

1-4550 

1.4641 

1-4733 

1.4826 

34 

9.1 

56 

1.4826 

1.4919 

1.5013 

1.5108 

1.5204 

i-530i 

1-5399 

33 

9-6 

57 

1-5399 

1-5497 

1-5597 

1.5697 

1.5798 

1.5900 

1.6003 

32 

10.  1 

58 

1.6003 

1.6107 

1.6212 

1.6319 

1.6426 

1.6534 

1.6643 

3i 

10.7 

59 

1.6643 

1.6753 

1.6864 

1.6977 

1.7090 

1.7205 

1.7321 

30 

ir-3 

60 

1.7321 

1-7437 

1.7556 

1.7675 

1.7796 

1.7917 

1.8040 

29 

12.0 

61 

1.8040 

1.8165 

1.8291 

1.8418 

1.8546 

1.8676 

1.8807 

28 

12.8 

62 

1.8807 

i  .8940 

1.9074 

1.9210 

1-9347 

1.9486 

1.9626 

27 

13-6 

63 

1.9626 

1.9768 

1.9912 

2.0057 

2.0204 

2.0353 

2.0503 

26 

14.6 

64 

2.0503 

2.0655 

2.0809 

2.0965 

2.1123 

2.1283 

2.1445 

25 

15.7 

65 

2.1445 

2.1609 

2.1775 

2.1943 

2.2113 

2.2286 

2.2460 

24 

16.9 

66 

2.2460 

2.2637 

2.2817 

2.2998 

2.3183 

2.3369 

2-3559 

23 

I8.3 

67 

2-3559 

2.3750 

2-3945 

2.4142 

2.4342 

2-4545 

2.4751 

22 

19.9 

68 

2.4751 

2.4960 

2.5172 

2.5386 

2.5605 

2.5826 

2.6051 

21 

21.7 

69 

2.6051 

2.6279 

2.6511 

2.6746 

2.6985 

2.7228 

2.7475 

20 

23.7 

70 

2-7475 

2.7725 

2.7980 

2.8239 

2.8502 

2.8770 

2.9042 

19 

7i 

2.9042 

2.9319 

2.9600 

2.9887 

3.0178 

3-0475 

3.0777 

18 

72 

3.0777 

3.1084 

3.1397 

3.i7i6 

3.2041 

3-2371 

3-2709 

17 

73 

3.2709 

3-3052 

3-3402 

3-3759 

3.4124 

3-4495 

3.4874 

16 

74 

34874 

3-526i 

3-5656 

3.6059 

3-6470 

3-6891 

3-7321 

15 

75 

3.7321 

3.776o 

3.8208 

3.8667 

3.9136 

3.9617 

4.0108 

14 

76 

4.0108 

4.0611 

4.1126 

4.1653 

4.2193 

4.2747 

4.3315 

13 

77 

4.3315 

4.3897 

4-4494 

4.5107 

4.5736 

4.6382 

4.7046 

12 

78 

4.7046 

4.7729 

4-8430 

4.9152 

4.9894 

5.0658 

5.1446 

II 

79 

5.1446 

5.2257 

5.3093 

5.3955 

54845 

5.5764 

5.67I3' 

10 

80 

5-67I3 

5.7694 

5.8708 

5.9758 

6.0844 

6.1970 

6.3138 

9 

81 

6.3138 

6.4348 

6.5606 

6.6912 

6.8269 

6.9682 

7.H54 

8 

82 

7-IT54 

7.2687 

7.4287 

7.5958 

7.7704 

7-9530 

8.1443 

7 

83 

8.1443 

8.3450 

8.5555 

8.7769 

9.0098 

9.2553 

9.5I44 

6 

84 

9.5144 

9.7882 

10.0780 

10.3854 

10.7119 

11.0594 

11.4301 

5 

85 

11.4301 

11.8262 

12.2505 

12.7062 

13.1969 

13.7267 

14.3007 

4 

86 

14.3007 

14.9244 

15.6048 

16.3499 

17.1693 

18.0750 

19.0811 

3 

87 

19.0811 

20.2056 

21.4704 

22.9038 

24.5418 

26.4316 

28.6363 

2 

88 

28.6363 

31.2416 

34.3678 

38.1885 

42.9641 

49.1039 

57.2900 

I 

89 

57.2900 

68.7501 

85.9398 

114.5887 

171-8854 

343-7737 

CO 

O 

60' 

50' 

40' 

30/ 

20' 

10' 

0' 

Angle. 

Natural    Cotangents. 
239 


TABLE  99. 


LOGARITHMS   OF    NUMBERS. 


N. 

O   1    2   3   4 

56789 

d. 

Pr< 

>P.  1 

'arts 

\. 

o 

oooo  3010  4771  6021 

6QQO  7782  84SI  QO^I  QS42 

-7  s^  1  i  Wa"  wtfrO    37*5    sd^" 

i 

oooo  0414  0792  1139  1461 

1761  2041  2304  2553  2788 

2 

3010  3222  3424  3617  3802 

3979  4i5o  4314  4472  4624 

3 

4771  4914  5051  5185  5315 

5441  5563  5682  5798  5911 

i 

43 

4,3 

42 

4,2 

41 

4,1 

40 

4,o 

4 

6021  6128  6232  6335  6435 

6532  6628  6721  6812  6902 

2 

8,6 

8,4 

8,2 

8,0 

i 

6990  7076  7160  7243  7324 

7782  7853  7924  7993  8062 

7404  7482  7559  7634  7709 
8129  8195  8261  8325  8388 

3 
4 
5 

12,9 
17,2 

21,5 

12,6 

16,8 

21,0 

12,3 

16,4 
20,5 

I2,O 

16,0 
20,0 

7 

8451  8513  8573  8633  8692 

8751  8808  8865  8921  8976 

6 
7 

25,8 
30,1 

25,2 
29,4 

24,6 
28,7 

24,0 
28,0 

8 

9031  9085  9138  9191  9243 

9294  9345  9395  9445  9494 

8 

34,4 

33,6 

32,8 

32,o 

9 

9542  9590  9638  9685  9731 

9777  9823  9868  9912  9956 

9 

38,7 

37,8 

36,9 

36,0 

10 

oooo  0043  0086  0128  0170 

0212  0253  0294  0334  0374 

41 

ii 

0414  0453  0492  0531  0569 

0607  0645  0682  0719  0755 

38 

12 

0792  0828  0864  0899  0934 

0969  1004  1038  1072  1106 

35 

39 

38 

37 

36 

13 

1139  1173  1206  1239  1271 

1303  1335  1367  1399  M30 

32 

i 

3,9 

3,8 

3,7 

3,6 

14 

1461  1492  1523  1553  1584 

1614  1644  1673  1703  1732 

30 

2 

3 

7,8 

7,6 
11,4 

7,4 
n,  i 

7,2 

10,8 

15 

1761  1790  1818  1847  1875 

1903  1931  1959  1987  2014 

28 

4 

I5J6 

15,2 

14,8 

14,4 

16 

2041  2068  2095  2122  2148 

2175  22OI  2227  2253  2279 

26 

I 

19,5 
23,4 

19,0 

22,8 

18,5 

22,2 

18,0 

21,6 

17 

2304  2330  2355  2380  2405 

2430  2455  2480  2504  2529 

25 

7 

27,3 

26,6 

25,9 

25,2 

18 

2553  2577  2601  2625  2648 

2672  2695  27l8  2742  2765 

24 

8 

3i,2 

30,4 

29,6 

28,8 

19 

2788  2810  2833  2856  2878 

2900  2923  2945  2967  2989 

22 

9 

35,  i 

34,2 

33,3 

32,4 

20 

3010  3032  3054  3075  3096 

3Il8  3139  3160  3181  3201 

21 

21 

3222  3243  3263  3284  3304 

3324  3345  3365  3385  3404 

20 

22 

3424  3444  3464  3483  3502 

3522  354i  356o  3579  3598 

19 

35 

34 

33 

32 

23 

3617  3636  3655  3674  3692 

3711  3729  3747  3766  3784 

18 

i 

3,5 

11 

i'i 

24 

3802  3820  3838  3856  3874 

3892  3909  3927  3945  3962 

18 

2 

3 

io!s 

O,O 
10,2 

0,0 
9,9 

6,4 
9,6 

25 

3979  3997  4014  4031  4048 

4065  4082  4099  4116  4133 

17 

4 

14,0 

13,6 

13,2 

12,8 

26 

4150  4166  4183  4200  4216 

4232  4249  4265  4281  4298 

16 

| 

17,5 

21,0 

17,0 
20,4 

16,5 
19,8 

16,0 
19,2 

27 

4314  4330  4346  4362  4378 

4393  4409  4425  4440  4456 

16 

7 

24,5 

83,1 

23,1 

22,4 

28 
29 

4472  4487  4502  4518  4533 
4624  4639  4654  4669  4683 

4548  4564  4579  4594  4609 
4698  4713  4728  4742  4757 

15 

15 

8 
9 

28,0 
3i,5 

27,2 
30,6 

26,4 
29,7 

25,6 

30 

4771  4786  4800  4814  4829 

4843  4857  4871  4886  4900 

14 

31 

4914  4928  4942  4955  4969 

4983  4997  Son  5024  5038 

14 

32 

5051  5065  5079  5092  5105 

5119  5132  5145  5159  5172 

13 

31 

30 

29 

28 

_  0 

33 

5185  5198  5211  5224  5237 

5250  5263  5276  5289  5302 

13 

2 

63,'2 

3,° 
60 

if 

2,o 

5,6 

34 

5315  5328  5340  5353  5366 

5378  5391  5403  54i6  5428 

13 

3 

9,3 

90 

8,4 

35 

5441  5453  5465  5478  5490 

5502  5514  5527  5539  5551 

12 

4 

c 

12,4 

JCC 

12  O 

15  o 

J4>5 

11,2 
I4,O 

36 

5563  5575  5587  5599  5611 

5623  5635  5647  5658  5670 

12 

6 

18,6 

180 

17,4 

37 

5682  5694  5705  5717  5729 

5740  5752  5763  5775  5786 

12 

87 

21>7 

21  O 

20,3 

27  2 

19,6 

38 

5798  5809  5821  5832  5843 

5855  5866  5877  5888  5899 

II 

9 

27,9 

27Jo 

f 
26,1 

25^2 

39 

5911  5922  5933  5944  5955 

5966  5977  5988  5999  6010 

II 

40 

6021  6031  6042  6053  6064 

6075  6085  6096  6107  6117 

II 

4i 

6128  6138  6149  6160  6170 

6180  6191  6201  6212  6222 

10 

27 

26 

25 

24 

42 

6232  6243  6253  6263  6274 

6284  6294  6304  6314  6325 

10 

i 

2,7 

2,6 

2,5 

2A 

43 

6335  6345  6355  6365  6375 

6385  6395  6405  6415  6425 

10 

2 

3 

5,4 
8,1 

7,'S 

5,0 

7,5 

4,8 

44 

6435  6444  6454  6464  6474 

6484  6493  6503  6513  6522 

10 

4 

10,8 

10,4 

10,0 

9^6 

45 

6532  6542  6551  6561  6571 

6580  6590  6599  6609  6618 

10 

5 

il'i 

13,0 
ic  g 

12,5 

TC  O 

I2,O 

14  4 

46 

6628  6637  6646  6656  6665 

6675  6684  6693  6702  6712 

9 

7 

18^9 

AO)U 

18,2 

*OP* 

17,5 

16,8 

47 

48 

6721  6730  6739  6749  6758 
6812  6821  6830  6839  6848 

6767  6776  6785  6794  6803 
6857  6866  6875  6884  6893 

9 
9 

8 
9 

21,6 

24,3 

20,8 

23,4 

20,0 

22,5 

19,2 

21,6 

49 

6902  6911  6920  6928  6937 

6946  6955  6964  6972  6981 

9 

50 

6990  6998  7007  7016  7024 

7033  7042  7050  7059  7067 

9 

N. 

01234 

56789 

d. 

PPC 

P.  F 

'arts 

L 

SMITHSONIAN  TABLE*. 


240 


TABLE  99. 


LOGARITHMS    OF    NUMBERS. 


N. 

01234 

56789 

d. 

Prop.  Parts. 

50 

5i 
52 
53 
54 

P 
11 

59 
60 

61 
62 
63 
64 

65 
66 

67 
68 
69 

70 

7i 
72 

73 
74 
75 
76 

77 
78 
79 

80 

81 

82 
83 
84 
85 
86 

87 
88 

89 
90 

9i 
92 

93 
94 
95 
96 

97 
98 

99 
100 

6990  6998  7007  7016  7024 

7033  7042  7050  7059  7067 

9 

i 

2 

3 
4 

1 

I 

9 
i 

2 

3 
4 

9 

i 

2 

3 
4 

1 

9 

2 

3 
4 

1 

9 

23 

% 

6,9 
9,2 
11,5 

i6',i 
18,4 
20,7 

18 

1,8 
3,6 
5,4 

7,2 

9,o 
10,8 

12,6 

14,4 
16,2 

13 

3 

3,9 
S,2 

7|8 
9,1 
10.4 

"t7 

8 

0,8 
1,6 

2,4 
3,2 

4,0 

$ 

6,4 

7,2 

22 

2,2 

8 

8,8 

11,0 

13,2 
15,4 
17,6 
19,8 

17 

i,7 
3,4 
5,1 
6,8 
8,5 

IO,2 

11,9 

13,6 
15,3 

12 

1,2 

% 
& 

7,2 

8,4 
9,6 
10,8 

7 

o,7 
i,4 

2,1 
2,8 

3,5 

4,2 

4,9 

% 

21 

2,1 

% 

8,4 
10,5 

12,6 

14,7 

16,8 
18,9 

16 

1,6 

f 

i;0 

9,6 

11,2 
12,8 
14,4 

11 

1,1 

2,2 

3,3 
4,4 

i:l 
% 

9,9 

6 

0,6 

1,2 

1,8 

24 

& 
& 

5,4 

20 

2,0 
4,0 
6,0 
8,0 

IO,O 
12,0 
14,0 

16,0 
18,0 

15 

i,5 
3,o 
4,5 
6,0 
7,5 
9,o 
10,5 

12,0 

13,5 

10 

1,0 
2,0 
3,o 
4,0 
5,o 
6,0 
7,° 
8,0 
9,o 

5 

o,5 

1,0 

i,5 
2,0 

2,5 

3,0 
3,5 
4,o 
4,5 

19 

i,9 
3,8 
5,7 
7,6 
9,5 
11,4 
i3,3 
15,2 
I7,i 

14 

2,1 
% 

7,o 
8,4 
9,8 

11,2 
12,6 

9 

?:l 

2,7 

3,6 

4,5 

g 
g 

4 

0,4 
0,8 

1,2 

1,6 
2,0 

8 

!;! 

7076  7084  7093  7101  7110 
7160  7168  7177  7185  7193 
7243  7251  7259  7267  7275 
7324  7332  7340  7348  7356 
7404  7412  7419  7427  7435 
7482  7490  7497  7505  7513 

7559  7566  7574  7582  7589 
7634  7642  7649  7657  7664 
7709  7716  7723  7731  7738 

7118  7126  7135  7143  7152 
7202  7210  7218  7226  7235 
7284  7292  7300  7308  7316 
7364  7372  7380  7388  7396 
7443  7451  7459  7466  7474 
7520  7528  7536  7543  7551 
7597  7604  7612  7619  7627 
7672  7679  7686  7694  7701 
7745  7752  776o  7767  7774 

8 
8 
8 
8 
8 
8 
8 
7 
7 

7 

7782  7789  7796  7803  7810 

7818  7825  7832  7839  7846 

7853  7860  7868  7875  7882 
7924  7931  7938  7945  7952 
7993  8000  8007  8014  8021 
8062  8069  8075  8082  8089 
8129  8136  8142  8149  8156 
8195  8202  8209  8215  8222 
8261  8267  8274  8280  8287 
8325  8331  8338  8344  8351 
8388  8395  8401  8407  8414 

7889  7896  7903  7910  7917 
7959  7966  7973  7980  7987 
8028  8035  8041  8048  8055 
8096  8102  8109  8116  8122 
8162  8169  8176  8182  8189 
8228  8235  8241  8248  8254 
8293  8299  8306  8312  8319 
8357  8363  8370  8376  8382 
8420  8426  8432  8439  8445 

7 
7 
7 
7 
7 
7 
6 
6 
6 

8451  8457  8463  8470  8476 

8482  8488  8494  8500  8506 

6 

8513  8519  8525  8531  8537 

8573  8579  8585  8591  8597 
8633  8639  8645  8651  8657 

8692  8698  8704  8710  8716 
8751  8756  8762  8768  8774 
8808  8814  8820  8825  8831 
8865  8871  8876  8882  8887 
8921  8927  8932  8938  8943 
8976  8982  8987  8993  8998 

8543  8549  8555  8561  8567 
8603  8609  8615  8621  8627 
8663  8669  8675  8681  8686 
8722  8727  8733  8739  8745 
8779  8785  8791  8797  8802 
8837  8842  8848  8854  8859 
8893  8899  8904  8910  8915 
8949  8954  8960  8965  8971 
9004  9009  9015  9020  9025 

6 
6 
6 
6 
6 
6 
6 
6 
5 

9031  9036  9042  9047  9053 

9058  9063  9069  9074  9079 

5 

9085  9090  9096  9101  9106 
9138  9143  9149  9154  9159 
9191  9196  9201  9206  9212 
9243  9248  9253  9258  9263 
9294  9299  9304  9309  9315 
9345  9350  9355  9360  9365 
9395  94oo  9405  94io  9415 
9445  9450  9455  9460  9465 
9494  9499  95Q4  9509  95*3 

9112  9117  9122  9128  9133 
9165  9170  9175  9180  9186 
9217  9222  9227  9232  9238 
9269  9274  9279  9284  9289 
9320  9325  9330  9335  9340 
9370  9375  9380  9385  9390 
9420  9425  9430  9435  9440 
9469  9474  9479  9484  9489 
95i8  9523  9528  9533  9538 

5 
5 
5 
5 
5 
5 
5 
5 
5 

9542  9547  9552  9557  9562 

9566  9571  9576  9581  9586 

5 

959°  9595  9600  9605  9609 
9638  9643  9647  9652  9657 
9685  9689  9694  9699  9703 

9731  9736  974i  9745  9750 
9777  9782  9786  9791  9795 
9823  9827  9832  9836  9841 
9868  9872  9877  9881  9886 
9912  9917  9921  9926  9930 
9956  9961  9965  9969  9974 

9614  9619  9624  9628  9633 
9661  9666  9671  9675  9680 
9708  9713  9717  9722  9727 

9754  9759  9763  9768  9773 
9800  9805  9809  9814  9818 
9845  9850  9854  9859  9863 
9890  9894  9899  9903  9908 
9934  9939  9943  9948  9952 
9978  9983  9987  999i  9996 

5 
5 
5 
5 
5 
4 
4 
4 
4 

oooo  0004  0009  0013  0017 

0022  0026  0030  0035  0039 

4 

N. 

01234 

56789 

d. 

Prop.  Parts. 

SMITHSONIAN  TABLES. 


24I 


LIST    OF    METEOROLOGICAL   STATIONS. 

NORTH  AMERICA — 

Canada PAGE  244 

Central  America     .     . 244 

Greenland 244 

Mexico      ....     ,     .     .    ,* 244 

United  States      .     .•'.     .     ..',:*' 245 

West  Indies 244 

SOUTH  AMERICA      .     .    .    V    .    .    .    . PAGE  246 

EUROPE  — 

Austro- Hungary PAGE  247 

Belgium 248 

British  Isles 248 

Denmark 249 

France 249 

Germany 250 

Greece  .     .     ..    ..-.   .     .  *• *   . . 248 

Holland     .....' 248 

Italy     ......     ............  251 

Norway 249 

Portugal    ...........   '....-•   ....  253 

Roumania 248 

Russia ...*..  251 

Spain .     .     .     .     .     .     .     .  253 

Sweden 249 

Switzerland 253 

Turkey 248 

ASIA PAGE  254 

AUSTRALASIA PAGE  256 

AFRICA  AND  NEIGHBORING  ISLANDS PAGE  256 

INTERNATIONAL  POLAR  STATIONS  .     .    .    .....    .    •  PAGE  257 

MISCELLANEOUS  ISLANDS PAGE  257 


243 


TABLE  100. 


LIST    OF    METEOROLOGICAL   STATIONS. 

(The  asterisk  *  designates  stations  of  the  first  order.) 


NORTH    AMERICA. 

CANADA, 
pather  Point                

Latitude. 

Longitude 
from 
Greenwich. 

Height  above 
Sea-level. 

48°  31'  N. 
45    57 
44    39 
44    14 

45    30 
45     19 
50    44 
46    48 

45     17 
46      8 
43    29 
49     12 
49    5i 
43      8 

64    ii   N. 
61     12 

72    47 

32     18  N. 

21         0 

23      8 
17    58 
21      7 
23     II 
19    26 

25      5 
18      6 
22      4 

18    34 
19      2 
18    20 
25     25 

22         9 

13    44 
J9    55 
19    24 

J9      12 

22    47 

68°  28'  W. 
66    38 

63    36 
76    29 

73    35 
80      o 
103    42 

7i     13 
66      3 
•  60    10 
79    23 
122    53 
97      7 
80    47 

51    46  W. 
48     ii 
55    53 

64    47  W. 
ioi     15 
76    35 
76    48 
ioi     41 
106    25 
99      8 
77    21 
76    42 

IO2       12 
72      21 
98      II 
64      56 

ioo    38 
ioo    58 
89      9 
75    50 
99    12 
96      8 
ioo    15 

Feet. 

20 
164 

122 

3°*7 
187 
641 

293 
116 

37 
350 
33 
758 
980 

36 
16 

39 

151 
6759 
62 

10 

5899 
249 
7487 
44 
3800 
6312 
118 
7119 
131 
5358 
6201 
2156 

21 
7621 
23 
8189 

m. 

6 
50 
37 
94 
57 
195 

89 

35 
ii 
107 
10 
231 
299 

ii 
5 

12 

46 
2060 

19 

3 
1798 
76 
2282 

13 
1158 
1924 
36 
2170 
40 

1633 
1890 

657 
6 

2323 
7 
2496 

*  Halifax    

*  Montreal                  

Ou'Appelle                

*  Quebec  

*  Saint  John           

*  Sydney  

*  ^Westminster               

*  Woodstock           

CENTRAL  AMERICA. 
(See  MEXICO.) 

GREENLAND. 
Godthaab                        

Iviktut         

Upernivik                    

MEXICO,  CENTRAL  AMERICA, 
WEST  INDIES,  ETC. 
Bermuda  West  Indies  

Guanajuato   Mexico 

*Habana   Cuba  

Kingston  West  Indies  

Leon  Mexico 

Mazatlan   Mexico  

Mexico  (City  of) 

New  Castle  Jamaica               .... 

Pabellon   Mexico 

Port  au  Prince   Haiti  

Puebla   Mexico                            .  .  . 

St  Thomas  West  Indies 

Saltillo  Mexico  

San  Luis  Potosi   Mexico 

San  Salvador,  Central  America  .  . 
Santiago   Cuba    

Tacubaya  Mexico     

Vera  Cruz  Mexico                   . 

Zacatecas   Mexico    

SMITHSONIAN  TABLES. 


244 


TABLE   100. 


LIST    OF    METEOROLOGICAL   STATIONS. 

(The  asterisk  *  designates  stations  of  the  first  order.) 


WEST  INDIES. 
(See  MEXICO.) 

UNITED  STATES. 
*  Abilene,    Texas  

Latitude. 

Longitude 
from 
Greenwich. 

Height  above 

Sea-level. 

32°  23'  N. 
42    39 
45      5 
33    45 
33    28 
46    47 
42     13 

42      21 

42    53 
4i    52 
39      6 
4i    30 
39    58 
4i    30 
39    45 
4i    35 

42      20 

37    45 
46    48 

44    54 
3i    47 
48    32 
29    18 
37    20 
46    34 
44    21 
39    46 
30    20 

39      5 
36    35 
24    34 
35    56 
37    25 
44    13 
46    34 
35      9 
43      2 
46    52 
41     17 
36    10 
29    58 
40    43 
40    46 
36    51 

99°  4C/W. 
73    45 
83    30 
84    23 
81    54 
100    38 
71      7 
7i      4 
78    53 
87    38 
84    30 
81    42 
83      o 
90    38 
105      o 
93    37 
83      3 

100        0 

92      6 
66    59 
106    30 
109    42 
94    50 
121     39 
112      4 
98    14 
86    10 
81    39 
94    37 
117    50 

81    49 
83    58 
79      9 
86    16 

87    24 
90      3 
87    54 
96    44 
70      6 
86    47 
90      4 
74      o 
73    58 
76    17 

Feet. 

1748 

85 
609 
1131 
209 
1698 
640 
125 
690 
824 
628 
751 
837 
613 
5287 
869 

724 
2523 
656 
53 
3796 
2690 
42 
4300 
4118 
1310 
766 
43 
963 
3622 

22 
980 
685 
615 

734 
330 
673 
935 
14 
553 
54 
185 
97 
43 

m. 

533 
26 
186 

345 
64 
5i8 
195 
38 

210 

251 
I9I 
229 

255 

I87 

1612 

265 

221 
769 
200 

16 

1157 
820 

13 
1311 
1255 

399 
234 
13 
294 
1104 

7 
299 
209 

187 
224 

101 

205 
285 
4 
169 
16 
56 
30 
13 

*  Albany  New  York  

*  Alpena  Michigan 

*  Atlanta    Georgia 

*  Augusta,  Georgia   

*  Bismarck  North  Dakota 

*  Blue  Hill   Massachusetts 

^Boston,  Massachusetts    ....... 

*  Buffalo,  New  York   

*  Chicago  Illinois 

*  Cincinnati,  Ohio    

*  Cleveland,  Ohio  

*  Columbus,  Ohio  

*  Davenport  Iowa 

*  Denver,  Colorado  

*  Des  Moines,  Iowa  

*  Detroit  Michigan  . 

*  Dodge  City,  Kansas  

*  Duluth,  Minnesota    

*  Kastport  Maine 

*  Bl  Paso,  Texas    

*  Fort  Assiniboine,  Montana  
*  Galveston  Texas 

*  Hamilton,  Mount,  California  .... 
*  Helena,  Montana  ... 

*  Huron  South  Dakota 

*  Indianapolis,  Indiana  

*  Jacksonville,  Florida  

*  Kansas  City,  Missouri    

*Keeler  California 

*  Key  West,  Florida    

*  Knoxville,  Tennessee  

*  I/ynchburg  Virginia 

*Manistee,  Michigan  

*  Marquette,  Michigan  

*  Memphis  Tennessee 

*  Milwaukee  Wisconsin 

*Moorhead,  Minnesota  

*  Nan  tucket,  Massachusetts   

*  Nashville,  Tennessee               .... 

*  New  Orleans  Louisiana 

*  New  York  City,  (  Weather  Bureau)  . 
*  New  York,  (Central  Park}  

*  Norfolk,  Virginia  

SMITHSONIAN  TABLES. 


245 


TABLE  100. 


LIST  OF   METEOROLOGICAL  STATIONS. 

(The  asterisk  *  designates  stations  of  the  first  order.) 


UNITED  STATES. 

(Continued.) 

Latitude. 

Longitude 
from 
Greenwich. 

Height  above 
Sea-level. 

47°     3'N. 
41     16 
39    58 
39    57 
38    50 
40    32 

45    32 
43      8 
43    13 
38    38 
44    58 
40    46 
32    43 
37    48 
35    4i 
46    28 

32      5 
57      3 
47    40 
27    57 
41    40 

53    53 
32    22 

38    54 
38    54 
44     16 
34    14 
32    45 

16    22  S. 

38    44  S. 
4    36  N. 
34    36  S. 
27      3  S. 
10    31  N. 
28    28  S. 
4    56  N. 

3i     23  S. 
29    56  S. 
31     25  S. 
27     28  S. 

6    47  N. 

20      12  S. 

34    55  S. 

122°  53'  W. 
95    56 
75     ii 
75      9 

105         2 
80         2 

122    43 
77    42 

123      20 
90      12 

93      3 
in    54 
117    10 

122      26 

105    57 

84      22 

81      5 
135     19 
117    25 
82     27 

83    34 
166    32 

90    53 
77      3 
77      3 
71     18 

77    57 
114    36 

71    22  W. 
62     ii 

73     15 
58    22 
70    53 
66    55 
65    56 

52      21 

58      4 

71      21 
64      12 
58      50 

58      9 

70      II 

57    54 

Feet. 

44 
1113 

112 
117 

I4I34 
847 
80 
523 
523 
571 
851 

4345 
93 
109 
7026 
642 
87 
63 
1938 
36 
674 

13 
254 

112 
110 
6279 
78 
141 

8050 

49 

72 
85 

1788 
16650 

200 
72 

1434 
253 
19300 

26 

m. 

13 
339 
34 
36 
4308 
258 
24 
159 
159 
174 
259 
1324 
28 

33 
2142 
196 
26 
19 
59i 
ii 

205 
4 
77 
34 
33 
1914 
24 
43 

2454 
15 

22 

26 

545 

5075 
61 

22 

437 
77 
5883 

8 

*  Philadelphia,  (Girard  College]  .  . 
*  Philadelphia,  (  Weather  Bureau}  . 
*  Pike's  Peak   Colorado  

•x-  pittsbursf  Pennsylvania  

*  Rochester   New  York    

*  Roseburcr    Oregon                      .  .  . 

*St    Paul,  Minnesota  

*Salt  Lake  City  Utah    

*  San  Diego   California      

*  San  Francisco    California 

*  Santa  F6  New  Mexico  

*  Sault  de  Ste.  Marie,  Michigan    .  . 
*  Savannah    Georgia    

Sitka  Alaska                            .  . 

*  Spokane,  Washington  
*  Tampa  Florida              

*  Toledo,  Ohio  

Unalaska   Alaska  

*  Vicksburg    Mississippi              .  .  . 

*  Washington  City,  (  Weather  Bureau") 
*  Washington  City,  (Naval  Obs'tfy). 
Washington,  Mount,  N.  H   .... 
*  Wilmington,  North  Carolina  .  .  . 

SOUTH  AMERICA. 

Bahia-Blanca,  Argentine  Republic 
Bogota,  United  States  of  Colombia 
Buenos  Aires,  Argentine  Republic 
Caldera   Chile                       

Caracas  Venezuela 

Catamarca,  Argentine  Republic    . 
Cayenne  French  Guiana   .      ... 

Charchani,  Peru,  (Arequipa)    .  .  . 
Concordia,  Argentine  Republic  .  . 
Coquimbo  Chile 

Cordoba,  Argentine  Republic  .  .  . 
Corrientes,  Argentine  Republic  .  . 
El  Misti,  Peru,  (Arequipa)     .... 
Georgetown,  British  Guiana    .  .  . 
Iquique,  Chile    

La  Plata,  Argentine  Republic    .  . 

SMITHSONIAN  TABLES 


246 


LIST  OF   METEOROLOGICAL  STATIONS. 

(The  asterisk  *  designates  stations  of  the  first  order.) 


TABLE  100. 


Latitude. 

Longitude 
from 
Greenwich. 

Height 

Sea-l 

above 
evel. 

SOUTH  AMERICA. 

(Continued.) 
I/ima    Peru  (Unanue)    

12°     4'S. 

77°     3XW. 

Feet, 
con 

m. 
IS8 

Matanzas,  Argentine  Republic   .  . 
JMontevidio   Uruguay       

34    49 

•24         C-2 

58    37 
s6    is 

Natal    Brazil  

5    5° 

3S     II 

Paramaribo,  Dutch  Guiana   .... 
Parana,  Argentine  Republic    .  .  . 
Potosi    Bolivia         

5    49  N. 
3i    43  S. 

IQ     35 

55     22 
60    16 
6s     3S 

256 
13324 

78 
4061 

Punta  Arenas  Chile                  .  .  . 

C-2         JO 

7o     S4 

•••00^4 

Quito    E^ouador                             .  . 

O      14 

78     45 

2008 

Rio  de  Janeiro  Brazil 

22      54 

43      IO 

yo^1 

^yuo 

Rio  de  Janeiro,  Brazil,  (new)  .  .  . 
Rioja,  Argentine  Republic    .... 
Santa  Cruz  de  la  Sierra,  Bolivia  .  . 
Santiago  Chile 

29      I9 
17     50 
33      27 

67     10 
63      o 

7O     41 

3500 
1772 

1067 
540 

tTQ 

23     37 

46     4O 

*/M3 

o*y 

Valdivia    Chile  

an     40 

73     16 

3Q 

12 

Valparaiso  Chile                     .... 

^        2 

71      3Q 

oy 

T3I 

4O 

Villa  Colon  Uruguay 

^4      CQ 

SO     IO 

-"•o-1 

T1!/! 

41 

Villa  Formoza,  Argentine  Republic 

EUROPE. 

AUSTRO-HUNGARY. 
*  Agram  (Zdgrdb)   

26      12 

45    49  N. 

58      6 
IS     SQ  K. 

134 
269 

S3S 

82 
163 

*Barzdorf     

50    23 

17       S 

827 

2S2 

Bregenz         ...         .      

47    3i 

o     45 

1352 

412 

49     ii 

16     36 

7S8 

231 

*  Budapest    

47    3° 

19        2 

SO2 

153 

48    18 

2S     S6 

774 

236 

*  Eerer 

So       5 

12      22 

ISIQ 

463 

*  Fiume                              .      .      ... 

At:      IQ 

14     27 

^o^y 
16 

Gleichenberg                                 .  . 

46      53' 

IS      SS 

Q74 

2Q7 

Gorz  

45    57 

13   •  37 

y/4 

2QQ 

•*y/ 
Qi 

Gries        

46    30 

II     2O 

QS8 

2Q2 

Krakow                      

50      4 

IQ     S7 

722 

2  2O 

48      3 

14      8 

1280 

3QO 

49    So 

24       2 

Q78 

298 

43     Io 

16    27 

3O 

9 

t/ienz                       

46    so 

12      46 

2231 

680 

*Obir                                  

46    30 

14      2Q 

67l6 

2047 

O-Gyalla                   .               .... 

47       ej^J 

18     12 

364 

in 

*Pisek     

49     19 

14        Q 

1280 

390 

Pola  

44    52 

13       SO 

IOS 

32 

Prasr  . 

so     s 

14     2S 

663 

202 

*  Prerau  

49     27 

17     27 

70S 

2IS 

*  Riva  

4S     S3 

10    50 

2QS 

go 

*  Salzburg                 .            .      .... 

47     48 

13        2 

1434 

437 

SMITHSONIAN  TABLES 


247 


TABLE    100. 


LIST    OF    METEOROLOGICAL   STATIONS. 

(The  asterisk  *  designates  stations  of  the  first  order.) 


Latitude. 

Longitude 
from 
Greenwich. 

Height  above 
Sea-level. 

AUSTRO-HUNGARY. 

(Continued.) 

47°  47'  N. 
47      3 
45    39 
48     15 

37    58  N. 
33     19 
33    54 
44    25 
41      2 
41     18 
45    21 
42      i 

45      9 
41       i 

49    40  N. 
50    51 
5i      4 
53     13 
52    57 
50    37 
5i      6 
50    51 
5i     14 
52      5 

57     10  N. 
54    21 
56    48 
53    22 

56  28 

55    56 
50      9 
55    53 
51     28 

55      o 
54    ii 
5i    46 
5i     29 

13°  26'  E. 
12     57 
13     46 
16    21 

23    45  B. 
44    26 
35    28 
26      6 
28    59 
36    19 
25    34 
35     19 
29    40 

39    45 

5    48  E. 
4    22 

2      40 

6    34 
4    45 
5    34 
5    48 
5    4i 
2    55 
5      7 

2      6  W. 
6    39 

5      8 

6      21 
2      56 

3     ii 
5      4 
4    18 
o    19 

7     19 
8    27 

I       20 
O        O 

Feet. 

5827 
10154 
85 
663 

112 

285 

26 
2822 

49 
7 
92 

1286 

177 

10 

49 
o 

200 

H5 

164 

16 
43 

88 
196 
4406 

155 

160 

183 
180 

34 

220 
122 
212 
159 

m. 

1776 

3095 
26 
2O2 

34 
87 

8 
860 
15 

2 

28 

392 

54 
3 
15 

0 

61 
35 
50 
5 
13 

27 
60 

1343 

47 
49 

56 
55 
10 

67 
37 
65 
48 

*Triest           

*\Vien                        

Zdgrab  (see  Agrcwri]          

GREECE,  ROUMANIA,  TURKEY. 

Ba.jjcla.cl.  Asiatic  Turkey               .  .  . 

Beirut  Turkey               

*  Bucarest  Roumaiiia                     .  .  • 

Constantinople  Turkey  

Sanisoun  Asiatic  Turkey               .  . 

Sinaia  Roumania         

Sinope  Turkey                         .... 

Trebizond  Asiatic  Turkey  

BELGIUM  AND   HOLLAND. 
Arlon   Belgium          

Bruxelies  Belgium 

*  Groningen    Holland   .         ... 

*Helder  Holland 

*  Liege  Belgium              

IMaeseyck  Belgium 

Maestricht  Holland  

^Ostende  Belgium  . 

*  Utrecht    Holland  

BRITISH  ISLES. 

*  Aberdeen 

*  Armagh    

*Ben  Nevis   .... 

Dublin 

Dundee  

Edinburgh  

*Falmouth       .  . 

*  Glasgow  ,.  .  . 

*Kew    

Londonderry  

*  Markree  Castle 

*  Oxford 

Greenwich  Observatory 

SMITHSONIAN  TABLES. 


248 


LIST  OF   METEOROLOGICAL  STATIONS. 

(The  asterisk  *  designates  stations  of  the  first  order.) 


TABLE  100. 


BRITISH  ISLES. 
(Continued.) 

Southampton 

Latitude. 

Longitude 
from 
Greenwich. 

Height  above 
Sea-level. 

50°  55'  N. 
50    44 
53    5i 
5i     55 
53    57 

67     17  N. 
56     10 
59    55 
63      7 
62      5 
55    27 
61    36 
65    50 
62    38 

55    4i 
57    44 
59      9 
59    21 
59    52 
55     25 

43      4N. 
47    14 
44    50 
48    24 

49    39 
45    55 
5i      3 
47    52 
45    4i 
43  -17 
45    50 
44    17 
47    13 
43    43 
48    49 
48    52 
48    49 
42    42 
42    57 
45    46 
45    47 
43    35 
43    37 

i°   24'  W. 

I     48 

2      28 

10    18 
i      5 

14    24  E. 
14    52 
10    43 
7    45 
9      7 
8    24 
5      2 
24      9 
17    57 

12      36 
10      38 

5     16 

18      4 
17    38 
9    18 

o      9  E. 
5    59  E. 
o    31  W. 
4    30  W. 
i    30  W. 
7      2  E. 

2      22   E. 

5    20  E. 
4    47  E. 
5    23  E. 
7      2  E. 
5    16  E. 
i    33  W. 
7    18  E. 
2    30  E. 
2    18  E. 

2      20   E. 

2    53  E. 
o      8  E. 
3      5  E. 
2    57  *E. 
i     16  W. 
i    26  E. 

Feet. 

78 
295 
375 
23 
167 

23 
30 
82 
52 

2110 
2O 
26 
30 

49 

43 

10 

13 
144 

131 

1795 
896 

210 

3406 
23 
1529 
981 
246 
15780 
6234 
135 
IH5 

161 
1027 

105 
938o 
1273 
4813 
131 
636 

m. 

24 
90 
114 

7 
5i 

7 
9 
25 
16 

643 
6 
8 
9 
15 
13 
3 
4 
44 

40 

547 
273 

64 

1038 

7 
466 
299 

75 
4810 
1900 
4i 
340 
49 
3i3 

32 
2859 
388 
1467 
40 
194 

Southbourne    

*  Stonyhurst    

*  Valencia     

York 

DENMARK,  NORWAY,  SWEDEN. 
Bodo,  Norway    

Carlshatnn,  Sweden    

*  Christiania,  Norway      

Christiansund,  Norway    . 

Dovre   Norway 

Fano,  Denmark    

Haparanda,  Sweden    

Hernosand,  Sweden      .            ... 

Kjobenhavn  Denmark 

Skagen,  Denmark   

Skudesnes,  Norway   

Stockholm   Sweden   . 

*  Upsal,  Sweden   

*  Vandrup,  Denmark    

FRANCE. 
B  agn  £r  es-de-Bigorre 

Besancon   . 

Bordeaux   

Brest     

Cherbourg 

Chamonix                            . 

Dunkerque   

I^angres  

*  Lyon 

*  Marseille    

Mont  Blanc  (Haute  Savoie)     .  .  . 
*  Mont  Ventoux  .      ... 

Nantes    . 

Nice  . 

*  Paris,  (Pare  de  Saint-Maur]    .  .  . 
*  Paris,  (Tour  Eiffel} 

Paris   (Montsouris) 

*  Peroiefnan 

*  Pic-du-Midi  

Puy-de-Dome,  (Plaine)    

*  Puy-de-Dome,  (Sommet  )    

*  Saint-Martin-de-Hinx   

*  Toulouse 

SMITHSONIAN  TABLES 


249 


TABLE  100. 


LIST   OF    METEOROLOGICAL   STATIONS. 

(The  asterisk  *  designates  stations  of  the  first  order.) 


GERMANY. 


Bamberg,  Bavaria 49°  54'  N. 

Berlin,  Prussia 52  30 

Borkum,  Prussia 53  35 

Bremen 53  51 

Breslau,  Prussia 51  7 

Bromberg,  Prussia 53  8 

Chemnitz,  Saxony 50  50 

Danzig,  Prussia 54  21 

Dresden,  Saxony 51  2 

Eichberg,  Prussia 50  55 

Freiberg,  Saxony 50  55 

Friedrichshafen,  Wiirttemberg  ...  47  39 

Gottingen,  Prussia 51  32 

Halle,  Prussia 51  29 

*  Hamburg 53  33 

Heidelberg,  Baden 49  25 

Hirschberg,  Bavaria    47  40 

Hohenpeissenberg,  Bavaria 47  48 

Jena,  Saxony 50  56 

*  Kaiserslautern,  Bavaria 49  27 

Karlsruhe,  Baden 49  i 

Kassel,  Prussia 51  19 

*  Keitum,  Prussia 54  54 

Kiel,  Prussia 54  20 

Leipzig,  Saxony 51  20 

*  Magdeburg,  Prussia 52  8 

Mannheim,  Baden 49  29 

*Memel,  Prussia 55  43 

Metz,  Lorraine 49  7 

Miilhausen,  Alsace 47  45 

*Miinchen,  Bavaria 48  9 

*  Neufahrwasser,  Prussia 54  24 

Niirnberg,  Bavaria 40  27 

Regensburg,  Bavaria 49  x 

Rostock,  Mecklenburg 54  5 

Riigenwaldermiinde,  Prussia  ....  54  26 

Schneekoppe,  Prussia 50  44 

Strassburg,  Alsace 48  35 

Stuttgart,  Wiirttemberg 48  47 

*  Swine rniinde,  Prussia c-j  eg 

Wendelstein,  Bavaria 47  ^2 

Wilhelmshaven,  Oldenburg    ....  53  32 

Wiirzburg,  Bavaria 4^  48 

*Wustrow,  Mecklenburg 1-4  21 


(See  BELGIUM.) 


Latitude. 


Longitude 

from 
Greenwich. 


10°  53'  B. 

13  23 

6  40 

8  48 

17  2 

18  o 

12  55 
18  40 

13  44 

15  48 

13  21 

9  28 
9  56 

ii  38 

9  58 

8  42 

ii  42 

11  i 
ir  35 

7  46 

8  25 

9  30 

8  22 

10  9 

12  23 

11  38 

8  28 
21  7 

6  10 

7  20 
ii  36 
18  40 

11  4 

12  6 

12  7 

16  23 
15  44 

7  45 

9  10 

14  16 

12  I 

8  9 

9  56 

12  24 


Height  above 
Sea-level. 


Feet. 
817 
161 

33 

13 

482 

138 

1037 

72 

390 
H45 
1335 
1335 

492 

364 
85 

394 
4954 
3261 

525 
794 
407 
669 
30 
154 
390 
177 

367 

13 

600 

787 
1736 

13 

1033 
H75 

72 

13 

5259 

472 

879 

33 

5666 

26 

587 

23 


SMITHSONIAN  TABLES. 


250 


TABLE  100. 


LIST    OF    METEOROLOGICAL   STATIONS. 

(The  asterisk  *  designates  stations  of  the  first  order.) 


Latitude. 

Longitude 
from 
Greenwich. 

Heigh 
Sea- 

t  above 
level. 

ITAI.Y. 
Agnone   

41°  48'  N. 

14°   22rB. 

Feet. 

2644 

in. 
806 

Allessandria       

44.     54 

8     77 

722 

08 

Bologna  .  . 

AA       7O 

II     20 

27Q 

85 

Catania  Sicily 

77        c 

IA.      ^'J 

I  O2 

71 

Cosenza  

7Q     IQ 

16     17 

840 

256 

Firenze    

4*     46 

II      ic. 

24O 

77 

Geneva   

AA       *2A 

8     ss 

177 

Milano 

4«r     28 

911 

4.82 

147 

Modena  

44     3Q 

10    56 

2IO 

-        64 

Moncalieri   

45         O 

7     41 

846 

258 

Napoli 

40    50 

14     IO 

187 

57 

Palermo 

78      7 

17      21 

277 

71 

Parma 

AA        A& 

IO      IQ 

2QC 

QO 

Riposto   

77      41 

I*?     14 

*y9 

46 

14 

*Roma    

41     54 

12      2Q 

164 

5O 

Siracusa  

77          7 

1C        1C 

72 

22 

*  Torino        

AC          A 

7     41 

QO2 

275 

Veuezia 

4.c      26 

12     2O 

60 

21 

4*5     26 

II        I 

wy 
217 

66 

NORWAY. 

(See  DENMARK.) 

PORTUGAL. 
(See  SPAIN.) 

ROUMANIA. 
(See  GREECE.) 

RUSSIA. 
Alexandrowka,  Siberia  

50°   ^N. 

142°    7'  B. 

52 

16 

Astrachan  

46     21 

4.8        2 

46 

14 

Baranowo  

c6     2^ 

18     *6 

CQ7 

182 

Barnaul  Siberia                                 . 

C'l          2O 

87      47 

A  CQ 

I4O 

6^    56 

65      4 

^•oy 

IO5 

72 

Bogoslowsk  

CO       AX 

60       I 

6l7 

188 

Brest-I/itowsk   

C2       «; 

27      4O 

/I  A  7 

175 

Brjansk                                

£:•?      jc 

74      22 

6c6 

AoO 
2OO 

58     27 

26     47 

2IO 

64 

48      71 

72      17 

4O7 

124 

Bnisseisk,  Siberia  

c8      27 

Q2        6 

27Q 

85 

Kriwan    .  ,                            

4O      IO 

44     3O 

726l 

QQ4 

Gudaur 

42     28 

/14     ^8 

7251 

V:7H- 
22IO 

60    10 

24     «?7 

66 

2O 

*  Irkutsk,  Siberia  

52      l6 

IO4.      IQ 

1611 

4QI 

Kaluga  

M7I 

•;6    16 

647 

106 

Kargopol  

6l       7O 

•28     57 

AAO 

174 

SMITHSONIAN  TABLES. 


251 


TABLE  100. 


LIST   OF    METEOROLOGICAL   STATIONS. 

(The  asterisk  *  designates  stations  of  the  first  order.) 


RUSSIA. 
(Continued.) 

Kars 40°  37' 

Kasan 55  47 

*  Katherinenburg 56  50 

Kiew 50  27 

Krassnyj-Koljadin 50  56 

Libau 56  31 

Lugan 48  35 

Malyj-Usen 50  31 

Marchinskae,  Siberia 62  10 

Melitopol 46  51 

Mesen 65  50 

Moskau 55  46 

Nertschinsk,  (Hiittenw.)  Siberia  .  .  51  19 

Nikolaewsk  a.  A.,  Siberia 53  8 

Nikolaewskij-Sawod,  Siberia  ....  55  55 

Nikolsk 59  32 

Noshowka 57  5 

Noworossijsk 44  43 

Obdorsk 66  31 

Odessa 46  29 

Omsk,  Siberia 54  58 

Orenburg 51  45 

*  Pawlowsk 59  41 

Pensa 53  n 

Perm 58  i 

Pernau 58  23 

Petrosawodsk 61  47 

Petrowsk    . 42  59 

Pinsk 52  7 

Pjatigorsk 44  3 

Pleskau 57  49 

Polibino 53  44 

Rostow,  a.  D 47  13 

Rykowskoe,  Siberia 50  47 

*  St.  Petersburg 59  56 

Schenkursk 62  6 

Skopin. 53  49 

Slatoust 55  10 

Ssimferopol 44  57 

Ssmolensk 54  47 

Ssofijskij  Priisk,  Siberia 52  27 

Ssolowezkij-Kloster 65  i 

Staro-Ssidorowa,  Siberia 55  26 

Tambow 52  44 

Tara,  Siberia 56  54 

*Tiflis 41  43 


Latitude. 


Longitude 

from 
Greenwich. 


43°  5'B. 

49  8 

60  38 

30  3° 

33  3 

21  I 

39  20 

47  37 

129  43 

35  23 

44  16 
37  40 

"9  37 

140  45 

101  28 

45  27 

54  45 
37  46 
66  35 
30  44 

73  20 

55  6 
30  29 
45  i 

56  16 
24  30 

34  23 
47  3i 
26  6 

43  5 

28  20 

52  56 

39  43 

142  55 

30  16 

42  54 

39  33 

59  4i 

34  6 
32  4 

134  7 

35  45 
65  10 
41  28 

74  17 

44  48 


Height  above 
Sea-level. 


Feet. 

5722 
226 
928 
600 

538 

20 
164 

95 

5i8 

56 

52 

469 

2156 

85 

1198 
486 

387 
66 

121 

213 
292 

354 
I31 
722 

384 

33 

220 

33 
459 
1657 
148 
322 
292 
449 

20 

138 

512 

1476 

882 

692 

39 

344 

433 

259 

1342 


SMITHSONIAN  TABLES. 


252 


TABLE  100. 


LIST    OF    METEOROLOGICAL   STATIONS. 

(The  asterisk  *  designates  stations  of  the  first  order.) 


Latitude. 

Longitude 
from 
Greenwich. 

Heighl 
Sea- 

above 
level. 

RUSSIA. 
(Continued.) 

Tjumeu,  Siberia           

«57°    lo'N. 

65°    32XB. 

Feet. 

272 

ra. 

83 

Tobolsk,  Siberia 

58      12 

68     14 

171 

S2 

Tomsk,  Siberia    

56     30 

84     58 

3OS 

93 

Tunka,  Siberia  

51    45 

IO2     33 

2434 

742 

Umaii    

48    45 

^O       1^ 

73S 

224 

Uralsk  .... 

si     12 

SI      22 

98 

^O 

Urjupinskaja  

5°    48 

42      o 

302 

92 

Ust-Ssyssolsk  

6  1    40 

5°    51 

413 

126 

Walaam,  Finland 

61     23 

30     S7 

141 

43 

Warschau  

52     13 

21         2 

39° 

119 

Wernvj,  Siberia   

43    J6 

76    53 

2402 

732 

Wilna   

54    41 

25     18 

348 

106 

Wjatka    

58    36 

49     41 

587 

179 

Wladikawkas  ....*... 

43       2 

44    41 

2244 

684 

Wologda    

59      14 

30     £53 

387 

118 

Wyschnij-Wolotschek   

57     35 

34    34 

545 

166 

SPAIN   AND   PORTUGAL. 
Barcelona,  Spain    

41     22  N. 

2      10    B. 

69 

21 

Cddiz,  Spain   

36     31 

6    18  W. 

*  Coimbra,  Portugal  

40     12 

8    25  W. 

4SQ 

I4O 

Gibralter  

36      6 

5    21   W. 

53 

16 

*  Ivisboa,  Portugal  

38    43 

9      9  W. 

312 

95 

Madrid,  Spain  

40    24 

3    41  W. 

2149 

655 

Oporto,  Portugal    

41         Q 

8    27  W. 

279 

85 

Oviedo,  Spain    

43    23 

5    48  W. 

801 

244 

San  Fernando,  Spain  

36    28 

o    25  W. 

92 

28 

*  Sierra  da  Estrella,  Portugal  .... 
Valencia,  Spain  

40    25 

30      28 

7    35  W. 

0      22    W. 

4728 
59 

1441 
18 

SWEDEN. 
(See  DENMARK.) 

SWITZERLAND. 
Altstatten  

977     T? 

jr/io 

47O 

Altdorf  

4/      *6    **• 

A£\    ^7 

66    -c'« 

87Q 

•LD4'S 
TcQQ 

xQ/f 

Basel  

4U      Oo 

39 

4°4 
278 

*Bern    

47     33 

35 

*7        Ofi 

912 

TCQn 

•/<* 

177 

Castasegna   . 

4°     o/ 
46     20 

7     2O 

97T 

22Q7 

O/O 

7OO 

Chaumont  

A7          T 

Ox 

7.7OI 

1128 

Gabris  

4/         * 
A1       27 

o    oy 

9-28 

4III 

I2S3 

Genf  

4/      *0 

A()       T2 

fi           0 

I77Q 

408 

Lugano   

o      9 

Q       c« 

Aooy 

QO2 

27C 

Neuenburg  

A7        O 

°       O/ 
6       £J7 

yu-c 
1601 

488 

Rigi-Kulm    .  .  *  

A7         7 

u      O/ 
87O 

c873 

I79O 

*  St.  Bernhard  

4/         O 

AC          CO 

7TT 

8l3O 

2478 

40      O-^ 

** 

SMITHSONIAN  TABLES. 


253 


TABLE  100. 


LIST   OF   METEOROLOGICAL  STATIONS. 

(The  asterisk  *  designates  stations  of  the  first  order.) 


SWITZERLAND. 

(Continued.) 
*  Santis                        

Latitude. 

Longitude 
from 
Greenwich. 

Height  above 
Sea-level. 

47°  I5'N. 
46    26 
47    23 

12    45  N. 
26    28 

20      28 
25      26 

ii      6 
12    59 
15    52 
15      9 

25      20 

24      6 

24      12 

18    54 
28    59 
22    32 
32    34 
37    29 

22      21 

6    56 

20      29 

23    43 
24    16 
28    40 
26      7 
15    52 
35      6 
41     46 
34    23 

22      18 
25       25 

22    44 
26    55 
25    27 
23      9 
3i    35 
36    33 
7     18 
39    25 
27    42 
25    20 

9°  20'  E. 
9    46 
8    33 

45      3  B. 
74    37 
92    57 
81     52 
72    48 
77    38 
74    42 
76    57 
83      2 
88     17 
96    58 
72    49 
5o    49 
88    20 
76     10 
126    33 
9^    50 
79    52 
85    54 
90    27 
72     14 
77     16 
89    50 
94     19 
129    30 
140    44 
132    27 
114    ii 
68    27 
75    53 
75    50 
78    37 
79    59 
130    33 
136    40 
80    40 
76      7 

85      12 
121      46 

Feet. 
8202 
5938 
1542 

94 
1611 

20 

309 
15 
2981 

2524 
1475 

267 

66 

37 
25 

21 
3005 
30 

87 
40 
80 
22 
466 
7l8 
H5 
41 

10 

14 
1  10 

117 
1823 

1431 
840 

1341 
13 

95 
1696 

3999 
4388 
33 

m. 

2500 
1810 

470 
29 

49  1 
6 

94 
5 
909 
769 
450 
81 

20 
II 

8 
6 
916 

9 
26 

12 
24 

7 
142 
219 
35 

12 

3 
4 
34 
36 
556 
436 
256* 
409 
4 
29 
517 
1219 

1338 

10 

Sils-Maria                              .      ... 

Ziirich              

TURKEY. 
(See  GREECE.) 

ASIA. 

[The  Stations  are  in  India  unless  otherwise 
indicated.     For  Siberian  Stations, 
see  RUSSIA.] 

Aden   Arabia 

Ajmere    

Akyab            .                          ... 

*  Allahabad 

Amini  Divi      

Bangalore 

Belgaum     

Bellary                    .      .         ... 

Benares 

Berhampore     

Bhamo 

*  Bombay  

Bushire,  Persia  

*  Calcutta 

Chamba  

Chemulpo,  Corea                     .  . 

Chittagong   

Colombo                   

Cuttack 

Dacca  

Deesa 

Delhi    

Dhubri       .  . 

Diamond  Island    

Fusan,  Corea         .  .         .         ... 

Hakodate  Japan 

Hiroshima,  Japan    

*  Hong-Kong,  China 

Hyderabad  

Indore     

Tevpore 

Jhansi 

Jubbulpore    

Kagoshima,  Japan  

Kanazawa  Japan 

Kandy     

Kaschgar,  China  

Katmandu 

Kelung  China 

SMITHSONIAN  TABLES 


254 


LIST  OF   METEOROLOGICAL  STATIONS. 

(The  asterisk  *  designates  stations  of  the  first  order.) 


LE  1OO. 


ASIA. 

(Continued.) 

Kioto,  Japan 35°  i' 

Kurrachee 24  47 

*  Lahore 31  34 

Leh 34  10 

Lucknow 26  50 

Madras 13  4 

Mandalay 21  59 

Mangalore 12  52 

Matsuyama,  Japan 33  50 

Mergui 12  ii 

Moulmein 16  29 

Mussooree 30  28 

Nagasaki,  Japan 32  44 

Nagoya,  Japan 35  10 

Nagpur 21  9 

Nemuro,  Japan 43  20 

Niigata,  Japan 37  55 

Oita,  Japan 33  13 

Osaka,  Japan 34  42 

Patna 25  37 

Peking,  China j|  .  ..  39  57 

Peshawar 34  2 

Poona 18  28 

Quetta,  Beluchistan 30  n 

Raipur 21  15 

Rajkot 22  17 

Rangoon 16  46 

Sakai,  Japan 35  33 

Sapporo,  Japan 43  4 

Saugor  Island 21  39 

Silchar 24  49 

Simla    . 31  6 

Si-wan-tse,  China 40  59 

Soul,  Corea 37  35 

Soya,  Japan     45  31 

Surat 21  13 

Taku,  China 38  59 

Tezpur 26  36 

Tokio,  Japan 35  41 

Trichinopoly 10  50 

Udan,  China 44  35 

Urga,  China 47  55 

Vizagapatam 17  42 

Wakayama,  Japan 34  14 

Yuensan,  Corea 39  10 

*Zi-Ka-Wei,  China    .  .  31  12 


Latitude. 


Longitude 

from 
Greenwich. 


135°  46'  K. 
67      4 

74  20 

77  42 
81      o 

80  14 

96  8 
74  54 

132  45 
98  38 

97  40 

78  7 
129  52 
136  55 

79  ii 

145  35 
139      3 

131  36 

135  3i 

85  14 

116  28 

71  37 
74  10 
67      3 

81  41 
70  52 

96  12 

133  H 
141  22 

88      5 

92  50 

77  12 
115  18 
127      7 

141  55 

72  46 

117  40 
92  50 

139  45 

78  44 

III  10 

106  50 

83  22 

135      9 

127  25 
119      6 


Height  above 
Sea-level. 


Feet. 

161 

49 
702 

H503 
369 

22 

26 

105 
96 

94 

6881 

190 

49 
1025 

89 
85 
26 

23 
183 
125 

IIIO 

1840 

5502 

960 

429 

4i 

7 

56 

25 

104 

7048 

39°4 
118 

79 
36 
33 
251 
69 

255 

3773 
3i 
49 

23 


m. 

49 

15 

214 

3506 

112 

7 

8 
32 

29 
29 

2097 

58 

15 

312 

27 

26 

8 

7 

56 

38 

338 

56i 

1677 

293 

131 

12 

2 

17 

8 

32 

2148 

1190 

36 

24 

ii 

10 

76 

21 

78 

1150 

9 
15 


TABLES 


255 


TABLE  100. 


LIST   OF    METEOROLOGICAL   STATIONS. 

(The  asterisk  *  designates  stations  of  the  first  order.) 


AUSTRALASIA. 

Adelaide  South  Australia  

Latitude. 

Longitude 
from 
Greenwich. 

Height  above 
Sea-level. 

34°  57'  S. 
35      2 
23    38 
36    50 
6     ii 
22    55 
30      3 
27    28 

17    48 
15     28 
17     18 
3i    45 
42    53 
21      9 

2      10    N. 

14    35  N. 
37    50  S. 
5      2  N. 
3i    57  S. 
12    28  S. 

5      22    N. 

i     17  N. 
33    52  S. 
27    58  S. 
10    34  S. 
41     16  S. 

31     12  N. 
12    59 
36    47 
34    5i 
37     17 
30      5 
33    56  S. 
33    22  S. 

36      22    N. 

32     ii   S. 
29    36  S. 

36    38  N. 
33    53  N. 
32    35  N. 
33    20  S. 
30    36  N. 
28    43  S. 

138°  35'  E. 
H7    54 
133    37 
174    5i 
106    50 

139    38 
145    58 
153      6 
139    34 
145     17 
123    39 
128    58 
147    20 
149     J3 

102     .14 
120      58 
145         0 
100      20 
H5      52 
130      51 

loo    30 

103      51 
151       12 

143    43 

142      12 

174    47 

29    53  H. 
42    45 
3      4 
5    40 
9    50 
3i     17 
18    29 
19    20 
6    37 
25    38 
30    23 
4    12 
10      7 
3    40 
26    33 
32     16 
26    46 

Feet. 
88 

2100 
258 
26 

347 
137 

17 
7 
190 

12 

46 

91 
2O 

47 
70 

43 

10 

155 
140 

62 
36 
125 
400 

20 

40 

1493 
2l65 
2856 
2200 
3005 

33 
1706 
1800 

30 
4050 

m. 

27 
640 

79 
8 

106 

42 

5 

2 

58 

4 
14 
28 
6 
14 

21 
13 

3 
47 

43 

19 
ii 

38 

122 

6 

12 

455 
660 
870 
671 
916 

10 

520 
549 
9 
1234 

Albany  West  Australia    

Alice  Springs,  South  Australia  .  .  . 
Auckland   New  Zealand  

*  Batavia  Java  .  .         .... 

*  Boulia,  Queensland  

Bourke,  New  South  Wales  

*  Brisbane   Queensland 

*Burketown,  Queensland   

*Cooktown,  Queensland 

Derby,  West  Australia    

Kucla,  South  Australia  . 

Hobart  Tasmania 

*  Mackay,  Queensland  

Malacca,  Straits  Settlements  .... 
*  Manila,  Philippine  Islands  

Melbourne,  Victoria  .  . 

Penang,  Straits  Settlement  

Perth,  West  Australia  

Port  Darwin,  South  Australia   .  .  . 
Province  Wellesley,  Straits  Settle- 
ment. 
Singapore,  Straits  Settlement    .  .  . 
*  Sydney,  New  South  Wales 

*  Thargomindah,  Queensland   .... 
*  Thursday  Island,  Queensland   .  .  . 
Wellington,  New  Zealand    

AFRICA  AND  NEIGHBOR- 
ING ISLANDS. 

Alexandria,  Kgypt    .  .  . 

Assab,  Abyssinia    

Alger,  Algeria  

Biskra,  Algeria    

Bizerte,  Tunis  

Cairo,  Kgypt  

Cape  Town,  Cape  Colony  

Ceres,  Cape  Colony  

Constantine,  Algeria   . 

Cradock,  Cape  Colony  

Fort  Napier,  Natal  

Fort  National,  Algeria  . 

Gabes,  Tunis  

Ghardaia,  Algeria  

Grahamstown,  Cape  Colony    .... 
Ismailia,  Kgypt   . 

Kimberley,  Cape  Colony   .... 

SMITHSONIAN  TABLES. 


256 


LIST  OF   METEOROLOGICAL  STATIONS. 

(The  asterisk  *  designates  stations  of  the  first  order.) 


TABLE    1OO, 


AFRICA  AND  NEIGHBOR- 
ING ISLANDS. 

(Continued.) 
Laghouat  Algeria               

Latitude. 

Longitude 
from 
Greenwich. 

Height  above 
Sea-level. 

33°  48'N. 
35      6N. 
35    42  N. 
33    57  S. 
31     16  N. 
31    5i  S. 
8    49  S. 
8    30  N. 
35      2N. 
29    59  N. 
18    10  S. 
18    55  S. 
32    53  N. 
5    40  S. 

69    57  N. 
73    30 
62    39 
64    ii 
7o    59 
66    36 

81    44 
72    30 
55    3i  S. 
71    23  N. 
73    23  N. 
67     27  N. 
78     28  N. 
54    3i  S. 

13      8  N. 
21     18 

35    30 
27    28 

35    54 
15    36 
20      6  S. 
15    55  S. 
28    29  N. 

51  41  s. 

65      5N. 
62      2  N. 

2°  51'  E. 
I     51  W. 
o    39  W. 
25    37  B. 
32     18  E. 
26    51  E. 
13      7  B. 
13      9  W. 
o    39  W. 
32    30  B. 
49    25  E. 
47    36  E. 
13    ii  E. 
13    49  B. 

23    15  B. 
81      o  E. 
115    44  W. 
51    44  W. 
8    28  W. 

67      9  W. 

64    45  W. 
52    45  B. 
70    25  W. 
156    40  W. 
124      5  B. 
26    36  E. 
15    42  E. 
36      o  W. 

59    40  W. 

157  50  w. 

24      o  E. 
15    27  W. 
14    3i  B. 
39    27  E. 

57    33  B. 
5    43  W. 

16      21    W. 

57    5i  W. 

22      46   W. 

6    44  W. 

Feet. 

2454 
13 
197 

181 

20 
3500 
I94 
224 
1562 
10 
10 

4593 
66 

364 

3* 

50 
141 
30 
70 
10 
180 
40 
118 

36 
30 

m. 

748 

4 
60 

55 
6 
1067 

59 
68 
•  476 
3 
3 
1400 

20 

in 

9 

15 
43 
9 

21 

3 
55 

12 
36 

II 

9 

Memours  Algeria 

Oran,  Algeria  

Port  Elizabeth,  Cape  Colony   .  .  . 
Port-Said  Egypt  . 

Queenstown,  Cape  Colony    .... 
*  St.  Paul  de  Loando,  Angolo    .  .  . 
Sierra  Leone,  Senegambia    .... 
Sid1'  -Bel  -Abbe's  Algeria 

Suez,  Eervpt 

Tamatave,  Madagascar    

Tananarive    Madagascar    

Tripoli 

Vivi    Congo 

INTERNATIONAL  POLAR 
STATIONS. 

Bossekop    (Norway)     

Dicksonhavn    (Holland) 

Fort  Rae  (Great  Britain)  . 

Godthaab,  (Denmark)     

Jan  Mayen   (Austria)         

Kingua-Fjord,  Cumberland  Sound, 
(Germany}. 
Lady  Franklin  Bay,  (United  States) 
Nowaja  Semlja,  (Russia)   
Orange  Baie,  Cape  Horn,  (France) 
Point  Barrow,  (United  States)    .  . 
Sagastyr,  Lena  River,  (Russia)  .  . 
Sodankyla   (Finland) 

Spitzbergen,  (Sweden),  Cap  Thordsen 
Siid-Georgien,  (Germany)    .... 

MISCELLANEOUS 
ISLANDS. 

Barbados    .  .         

Honolulu,  Hawaiian  Islands  .  .  . 
La  Cane"e,  Crete    

Las  Palmas,  Canaries    

Malta,  Mediterranean   

Massaua,  Red  Sea    . 

*  Port  Louis  Mauritius  . 

*St  Helena 

Sainte-Croix    Teneriffe 

Stanley,  Falkland  Islands  

Stykkisholm,  Iceland  

Thorshavn  Faroe  Islands  .      ... 

SMITHSONIAN  TABLES 


257 


APPENDIX. 


CONSTANTS. 


Numerical  Constants. 

Base  of  natural  (Naperian)  logarithms, 
I^og  £,  modulus  of  common  logarithms, 
Circumference  of  circle  in  degrees, 
"  "       "      in  minutes, 

"  "       "      in  seconds, 

Circumference  of  circle,  diameter  unity, 

Number.  logarithm. 

27T  =  6.2831853         0.7981799 

—   =  1.0471976         0.0200286 


—   =0.3183099 


9.5028501  — 10 


Tf-2    =9.8696044  0.9942997 

The  arc  of  a  circle  equal  to  its  radius  is 

in  degrees,  p°   =  iSo/V 

in  minutes,  p'  =  60  P° 

in  seconds,  p"  =  60  p' 
For  a  circle  of  unit  radius,  the 

arc  of  i°  =  i/p° 

arc  of  ix  =i  /p' 

arc  (or  sine)  of  i"  =  i/p" 


Number. 

£=  2.7182818 

M=  0.4342945 

360 

=  21  6OO 

=    i  296  ooo 

7T=   3.14159265 
I/7T2   =  O.IOI32I2 
y'F     =    1.7724539 
-L     =0.5641896 


1.4142136 
1.7320508 

57*29578 
3437.7468' 
206  264.8" 

0.017  4533 
o.ooo  2909 
o.ooo  00485 


Logarithm. 

0.4342945 

9.6377843  - 10 

2.5563025 

4.3344538 

6.1126050 

0.4971499 

9.0057003  — 10 
0.2485749 

9.7514251  - 10 

0.1505150 
0.2385607 

1.7581226 

3.5362739 
5.3144251 

8.2418774  —  10 
6.4637261  — 10 
4.6855749  - 10 


Geodetical  Constants. 

Dimensions  of  the  earth  (Clarke's  spheroid,  1866)  and  derived  quantities  : 
Equatorial  semi-axis  in  feet,  a  =  20926062.  7.3206875 

in  miles,  a  =         3963-3         3.5980536 

Polar  semi-axis  in  feet,  b  =  20855121.  7.3192127 

in  miles,  b  =          3949-8          3.5965788 


(Eccentricity)*  = 


Flattening  = 


a-b 


2  =  0.00676866 

8  =    1/294.9784 

=  24  859.76 
=  24901.96 
=  196940400 


7.8305030  — 10 


miles. 


Perimeter  of  meridian  ellipse, 

Circumference  of  equator, 

Area  of  earth's  surface,  =  196  940  400      square  miles. 

Mean  density  of  the  earth  (HARKNESS)  =  5.576  ±0.016. 

Surface  density  "          "  "  =  2.56  ±  0.16. 

Acceleration  of  gravity  (HARKNESS)  : 

g$  (cm.  per  second)  =  980.60  (i  —0.002662  cos  2  <£),for  latitude  <J>  and  sea  level. 

g,  at  equator  =  977.99  ;     g,  at  Washington  =  980.07  ;    g,  at  Paris  =  980.94. 

g,  at  poles     =983.21;     g,  at  Greenwich    =981.17; 
Length  of  the  seconds  pendulum  (HARKNESS)  : 

/  ==  39.012540  +  0.208268  sin*  <£  inches    =    0.990910  +  0.005290  sin2  <£  metres. 


SMITHSONIAN  TABLES. 


258 


APPENDIX. 
CONSTANTS.-  Continued. 


Weight  in  grammes. 

62°  F.  4°  C. 

16.3479   16.3662 

0.9976    0.9987 


Astronomical  Constants  (HARKNESS). 

Sidereal  year  =  365.256357  8  mean  solar  days.  Tropical  year  =  365.2422  d. 

Sidereal  day  =  23*  56**  4.100*  mean  solar  time. 
Mean  solar  day  =  24^  3™  56.546*  sidereal  time. 
Mean  distance  of  the  earth  from  the  sun  =  92  800  ooo  miles. 

Physical  Constants. 

Velocity  of  light  (HARKNESS)  =  186337  miles  per  second  =  299878  km.  per  second. 
Velocity  of  sound  through  dry  air  =  1090  ^1+0.00367^°  C  feet  per  second. 

Weight  of  distilled  water,  free  from  air,  barometer  30  inches 

Weight  in  grains. 
Volume.  62o  jrm  4o  c 

I  cubic  inch  (determination  of  1890)      252.286     252.568 

i  cubic  centimetre  (1890)  15-3953      15.4125 

i  cubic  foot  (1890)  at  62°  F.  62.2786  Ibs. 

A  standard  atmosphere  is  the  pressure  of  a  vertical  column  of-  pure  mercury 
whose  height  is  760  mm.  and  temperature  o°  C.,  under  standard  gravity  at 
latitude  45°  and  at  sea  level. 

i  standard  atmosphere  =  1033  grammes  per  sq.  cm.  =  14.7  pounds  per  sq.  inch. 

Pressure  of  mercurial  column  i  inch  high  =  34.5  grammes  per  sq.  cm.  =  0.491 

pounds  per  sq.  inch. 
Weight  of  dry  air  (containing  0.0004  of  its  weight  of  carbonic  acid)  : 

i  cubic  centimetre  at  temperature  32°  F.  and  pressure  760  mm.  and  under 

the  standard  value  of  gravity  weighs  0.00129305  gramme. 
Density  of  mercury  at  o°  C.  (compared  with  water  of  maximum  density  under 

atmospheric  pressure)  =  13.5956. 

Freezing  point  of  mercury  =  —  38?5  C.     (REGNAUI/T,  1862.) 

Coefficient  of  expansion  of  air  (at  const,  pressure  of  j6omm)  for  i°  C.  (DO.):  0.003670. 
Coefficient  of  expansion  of  mercury  for  Centigrade  temperatures  (BROCH)  : 

/\  =  Ao  (1  —  0.000181 792  t  —  o. ooo  ooo  ooo  1 75  fr  —  .000000000035  116^). 
Coefficient  of  linear  expansion  of  brass  for  i°  C.,  ^3  =  0.0000174  to  0.0000190. 
Coefficient  of  cubical  expansion  of  glass  for  i°  C.,  7  =  0.000021  to  0.000028. 

Ordinary  glass  (RECKNAGEX) :  at  10°  C.t  y  =  0.0000255 ;  at  100°,  y  =  0.0000276. 
Specific  heat  of  dry  air  compared  with  an  equal  weight  of  water  : 

at  constant  pressure,  Kp  =  0.2374  (from  o°  to  100°  C.,  REGNAUI/T). 

at  constant  volume,  Kv  =  0.1689. 

Ratio  of  the  two  specific  heats  of  air  (RONTGEN):  Kp  / Kv=  1.4053. 
Thermal  conductivity  of  air  (GRAETz) :  k  =  0.0000484  (i  +0.001 85  f  C.)  gramme  . 

[The  quantity  of  heat  that  passes  in  unit  time  through  unit  area  of  a  plate  of  unit  thick- 
ness, when  its  opposite  faces  differ  in  temperature  by  one  degree.] 

Latent  heat  of  liquefaction  of  ice  (BUNSEN)  =  80.025  mass-degrees,  C. 
Latent  heat  of  vaporization  of  water  =1606. 5  —  0.695  t°  C. 

Absolute  zero  of  temperature  (THOMSON,  Heat,  Encyc.  Brit.}:  —273?©  C.  =  — 459?4  F. 
Mechanical  equivalent  of  heat*: 

i  pound-degree,  F.  (the  British  thermal  unit)  =  about  778  foot-pounds. 

i  pound-degree,  C.  =  1400  foot-pounds. 

i  calorie  or  kilogramme-degree,  C.  =  3087  foot-pounds  =  426.8  kilogram- 
metres  =  4187  joules  (for  g  =  981  cm.). 


*  Based  on  Prof.  Rowland's  determinations.    (Proc.  Am.  Acad.  Arts  and  Sri.,  1880.) 


SMITHSONIAN  TABLES. 


259 


APPENDIX, 


SYNOPTIC    CONVERSION    OF    ENGLISH    AND    METRIC    UNITS. 
English   to    Metric. 


Units  of  length, 

i  inch, 
foot, 
yard, 
mile. 

Units  of  area. 

square  inch, 
square  foot, 
square  yard, 
acre. 

square  mile. 
•  <<          <* 

Units  of  volume. 

i  cubic  inch, 
i  cubic  foot. 
I  cubic  yard. 


2.54000 
0.304801 
0.914402 
1.60935 


Metric  equivalents. 

centimetres; 

metre, 
« 

kilometres. 


6.4516  square  centimetres. 
929.034 

0.83613  square  metre. 

0.404687  hectares. 

2.5900  square  kilometres. 

259  hectares. 


16.3872       cubic  centimetres. 
0.028317    cubic  metres  or  steres. 
0.76456     cubic  metres  or  steres. 


3.78544  litres. 
0.94636  litres. 
4.5468  litres. 


Units  of  capacity. 

i  gallon  (U.  S.)  =  231  cubic  inches. 

i  quart  (U.  S.) 

i  Imperial  gallon  (British). 

277.463  cubic  inches  (1890). 
i  bushel  (U.  S.)  =2150.42  cubic  inches, 
i  bushel  (British). 

Units  of  mass. 

64.7989       milligrammes. 

0.4535924  kilogrammes. 
28.3495        grammes. 
31.1035       grammes. 

1.01605      tonnes. 


35-2393 
36.3477 


litres, 
litres. 


i  grain. 

i  pound  avoirdupois. 

i  ounce  avoirdupois. 

I  ounce  troy. 

i  ton  (224olbs.). 


Logarithms. 

0.404835 
9.484  016  — 10 
9.961  137  - 10 
0.206  650 


0.809  669 
2.968  032 
9.922  274  — 10 

9.607  120  —  10 
0.413  300 
2.413300 


I.2I4504 

8.452  047  - 10 
9.883411  — 10 


0.578  116 
9.976056  —  10 
0.657  709 

1.547027 
1.560477 


1.811  568 
9.656  666  — 10 
1.452  546 
1.492  809 
0.006  914 


Units  of  velocity. 


i  foot  per  sec.  (0.6818  miles  per  hr.)  =0.30480  metres  per  sec.  =  1.0973  km.  per  hr. 
i  mile  per  hr.  (1.46667  feet  per  sec.)  =0.44704  metres  per  sec.  =  1.6093  km.  per  hr. 

Units  of  force. 

i  poundal.  13825.5  dynes.  4.140682 

Weight  of  i  grain  (for  g  —  981  cm.).  63.57  dynes.  1.803  237 

Weight  of  i  pound  av.  (for g  =  981  cm.).     4.45  X  io5  dynes.  5.648  335 

Units  Of  Stress— in  gravitation  measure. 

i  pound  per  square  inch  =  70.307    grammes  per  sq.  centimetre.  1.846  997 

i  pound  per  square  foot  =  4.8824  kilogrammes  per  sq.  metre.  0.688  634 

Units  Of  work — in  absolute  measure, 
i  foot-poundal.  421 403  ergs.  5.624697 

— in  gravitation  measure. 

i  foot-pound  (for^-  =  981  cm.)  =  1356.3  X  io4  ergs  =  0.138255  kilogram-metres. 
Units  of  activity  (rate  of  doing  work). 

i  foot-pound  per  minute  (for  £-  =  981  cm.)  =0.022605  watts. 

i  horse-power  (33  ooo  foot-pounds  per  min.)  =  746  watts  =  1.01387  force  de  cheval. 

Units  of  heat. 

i  pound-degree,  F. 
i  pound-degree,  C. 


=  252  small  calories  or  gramme-degrees,  C. 
=  1.8  pound-degrees,  F. 


SMITHSONIAN  TABLES. 


26O 


APPENDIX. 


SYNOPTIC    CONVERSION    OF    ENGLISH    AND    METRIC    UNITS. 
Metric   to    English. 


Units  of  length. 

i  metre  (io6  microns). 

i  kilometre. 

Units  of  area. 

i   square  centimetre. 
i   square  metre. 

i    are  ( =  100  square  metres). 
I  hectare. 
I   square  kilometre. 
Units  of  volume. 

i  cubic  centimetre, 
i  cubic  metre  or  stere. 

Units  of  capacity. 

i  litre  (61.023  cubic  inches). 

M 

i  hectolitre. 

Units  of  mass. 

i  gramme, 
i  kilogramme. 


39.3700 
3.28083 
1.09361 
0.62137 


0.15500 
10.7639 

1.19599 
"9-599 

2.47104 

0.38610 


English  equivalents. 

inches, 
feet, 
yards, 
miles. 

square  inches, 
square  feet, 
square  yards, 
square  yards, 
acres, 
square  miles. 


Logarithms. 

1-595  165 
0.515  984 
p.o38863 
9.793  350 


0.0610234  cubic  inches. 
35'3i45       cubic  feet. 
1.30794     cubic  yards. 


0.26417 
1.05668 
0.21993 
2.83774 
2.7512 


15.4324 
2.20462 

35-274 
32.1507 
0.98421 


gallons  (U.  S.). 
quarts  (U.  S.). 


io 


9.190331-10 
1.031  968 
0.077  726 
2.077  726 
0.392880 
9.586700—  io 


8.785496-10 

1-547  953 
0.116589 


9.421  884  —  io 
0.023  944 


Imp.  gallons  (British).    9.342  291  —  io 
bushels  (U.  S.).  0.452  973 

bushels  (British).  0.439  523 

1.188432 

0.343  334 
1.547454 
1.507  191 
9.993086  —  10 


grains. 

pounds  avoirdupois, 
ounces  avoirdupois, 
ounces  troy, 
tons  (2240  Ibs.). 


3.2808 
2.2369 
0.62137 


feet  per  second, 
miles  per  hour, 
miles  per  hour. 


i  tonne. 

Units  of  velocity, 

i  metre  per  second. 
(t         ((        « 

i  km.  perhr.  (o.  2778m.  per  sec.) 

Units  of  force. 
i  dyne  (weight  of  (981)-*  grammes,  for^^  981  cm.)  =  7.2330  X  io 

Units  Of  Stress — in  gravitation  measure. 

i  gramme  per  square  centimetre.  0.014223  pounds  per  sq.  inch, 
i  kilogramme  per  square  metre.  0.20482  pounds  per  sq.  foot, 
i  standard  atmosphere.  14.7  pounds  per  sq.  inch. 

Units  Of  work— In  absolute  measure. 


0.515  984 

0-349  653 
9-793350-10 


poundals. 


(See  def.  p.  259.) 


i  erg. 


2.3730  X  10" 
le  =  io7  ergs. 


foot-poundals. 


i  megalerg  =  io9  ergs  ;  i  joule 

—  in  gravitation  measure. 

i  kilogram-metre  (for  £-  =  981  cm.)  =981  X  ios  ergs  =  7.  2330  foot-pounds. 
Units  of  activity  (rate  of  doing  work). 


i  watt.  44.2385  foot-pounds  per  minute,  for^-  =  981  cm. 

i  watt  =  i  joule  per  sec.  =  0.10194  kilogram-metre  per  sec.,  for  g  =  981  cm. 
i  force  de  cheval  =  75  kilogram-metres  per  sec.  =  735!  watts  =  0.98632  horse-power. 

Units  of  heat. 

i  calorie  or  kilogramme-degree  =  3.968  pound-degrees,  F.  =  2.2046  pound-degrees,  C. 
i  small  calorie  or  therm,  or  gramme-degree  =  o.ooi  calorie  or  kilogramme-degree. 


SMITHSONIAN  TABLES. 


261 


APPENDIX. 


DIMENSIONS    OF   PHYSICAL   QUANTITIES. 

L  =  length ;   M  =  mass  ;   T  —  time. 


Quantity. 

Area. 

Volume. 

Mass. 

Density. 

Velocity. 

Acceleration. 

Angle. 


Dimensions. 


Dimensions. 


[M] 
[MI,-3] 


[0] 


Angular  Velocity.     [T-1] 


Quantity. 

Momentum. 

Moment  of  Inertia. 

Force. 

Stress  (per  unit  area). 

Work  or  Energy. 

Rate  of  Working  (power)  [I?  M  T-3] 

Heat.  [Iv'MT^J 

Thermal  Conductivity.    [I,-1  M  T-1] 


[L,  M  T"1] 
[M  L2] 
[L  M  T~2] 
[Ir1  M  T-2 
[L8  M 


In  Electrostatics. 

Quantity  of  Electricity. 

Surface  Density:  quantity  per  unit  area. 

Difference  of  Potential:  quantity  of  work  required 
to  move  a  quantity  of  electricity  ;  (work  done)  -r-  (quan- 
tity moved). 

Electric  Force,  or  Electro-motive  Intensity: 
(quantity)  -«-  (distance2). 

Capacity  of  an  accumulator:  e-^-E. 

Specific  Inductive  Capacity. 

In  Magnetics. 

Quantity  of  Magnetism,  or  Strength  of  Pole. 
Strength  or  Intensity  of  Field: 

(quantity)  -r-  (distance2). 
Magnetic  Force. 

Magnetic  Moment:  (quantity)  X  (length). 
Intensity  of  Magnetization:  magnetic  moment  per 

unit  volume. 
Magnetic  Potential :  work  done  in  moving  a  quantity 

of  magnetism  ;  (work  done)  -=-  (quantity  moved). 
Magnetic  Inductive  Capacity. 


Symbol. 

e 
<r 
E 


Corq 


m 
S 


ml 
I 


Dimensions  in 
electrostatic  system. 


[IT* 


[IT* 


T-1] 
T-1] 


[L1 


Dimensions  in 

electro-magnetic 

system. 

T-1] 
TJ] 

[IT*  M*  T-1] 
[L*  M*  T-1] 
M*  T-1] 


In  Electro-magnetics. 

Intensity  of  Current. 

Quantity  of  Electricity  conveyed  by  cur- 
rent :  (intensity)  x  (time). 

Potential,  or  difference  of  potential :  (work 
done)  -T-  quantity  of  electricity  upon  which 
work  is  done. 

Electric  Force:  the  mechanical  force  act- 
ing on  electro-magnetic  unit  of  quantity ; 
(mechanical  force)  -5-  (quantity). 

Resistance  of  a  conductor:  E-s-i. 

Capacity  :  quantity  of  electricity  stored  up 
per  unit  potential-difference  produced  by  it. 

Specific  Conductivity:  the  intensity  of 
current  passing  across  unit  area  under  the 
action  of  unit  electric  force. 

Specific  Resistance:  the  reciprocal  of 
specific  conductivity. 


Symbol. 

i 
e 


R 
9 


Dimensions  in 

electro-magnetic 

system. 

[L*  M*  T-1] 
[I,*  M*] 

[Iv§  M*  T-2] 


[LT-1] 
[IT'T2] 

[IT2  T] 


[0] 

Name  of 
practical  unit. 

Ampere. 
Coulomb. 

Volt. 


Ohm. 
Farad. 


SMITHSONIAN  TABLES. 


262 


INTERNATIONAL   METEOROLOGICAL  SYMBOLS. 


The  International  Meteorological  Congress,  held  at  Vienna,  in  Septem- 
ber, 1873,  decided  that  it  was  desirable  to  introduce  for  various  meteorolo- 
gical conditions,  symbols  which  should  be  independent  of  any  national 
language  and  therefore  universally  intelligible.  From  the  symbols  and 
abbreviations  then  in  use  among  different  nations,  the  Permanent  Committee 
of  the  Congress  selected  a  number  for  international  use.  The  symbols  were 
modified  by  the  Congress  at  Munich,  in  1891,  and  the  abbreviations  for 
clouds  by  the  Conference  at  Upsala,  in  1894. 

References  : 

"  Summary  of  Resolutions  of  the  Vienna  Congress,  Appendix  K."  p,  64.     Prepared 

by  Mr.  Robert  H.  Scott,  Secretary. 

<c  Bericht  iiber  die  Int.  Meteor.  Confer enz  in  Miinchen,  1891,"  p.  19. 
"  Report  of  the  Int.  Met.  Conference  at  Munich,"  p.  20. 
"  Circular  of  the  U.  S.  Weather  Bureau,  January  i,  1894. 

The  intensity  of  the  condition  is  indicated  by  the  small  figures  °  and  2 
which  are  used  as  exponents  of  the  symbols.  Zero  (°)  denotes  very  slight 
intensity;  two  (2)  strong  or  marked.  Absence  of  an  exponent  indicates 
moderate  intensity.  A  dash  ( — )  indicates  continuance. 

Example.  Translation. 

%°  Light  rain. 

0  Moderate  rain. 
^2  Heavy  rain. 

1  <£  9  p.  —  10  p.  in  E.  ist.  Silent  lightning  from  9-10  p.  m.  in 

the  E. 

4  ^2  —  10  a  ;  15.  3  p.  —  5  p.  4th.  Heavy  rain  ended  10  a.  m. ;  thunder- 
storm from  3  to  5  p.  m. 

i6oo2a;  -)£2ii.3oa  —  2.50  p.  i6th.  Dense  haze  in  the  morning;  heavy 

snow  from  11.30  a.  m.  to  2.50  p.  m. 

The  time  of  occurrence  is  expressed  in  hours ;  morning  and  afternoon 
by  a.  and  p.  respectively.  The  hours  are  counted  from  o  to  12  commencing 
with  midnight. 

Where  tables  are  printed,  maximum  and  minimum  values  will  be  in 
heavy-faced  type. 

263 


264 


APPENDIX. 


Absence  of  precipitation  is  denoted  by  a 
.01  inch  (formerly  marked  T)  are  recorded 


dot  (.),  and  amounts  less  than 
.00. 


0  means  Degree. 

F  '       Fahrenheit. 

C  '       Centigrade. 

Ci.  *       Cirrus. 

Ci.  Cu.  Cirro-cumulus. 

Ci.  S.  Cirro-stratus. 

A.  Cu.  Alto-cumulus. 

Cu.  Cumulus. 

S.  Cu.  Strato-cumulus. 

S  Stratus. 

Max.  '        Maximum. 

Min.  Minimum. 


Mi. 

Kil. 

N. 

AS. 

CuN. 

Fr.  Cu. 

Fr.  N. 

Fr.  S. 

Scf. 

Ncf. 

MCu. 


,  Miles. 
Kilometers. 
Nimbus. 
Alto-stratus. 
Cumulo-nimbus. 
Fracto-cumulus. 
Fracto-nimbus. 
Fracto-stratus. 
Stratus  cumuliformis. 
Nimbus  cumuliformis 
Mammato  cumulus. 


i. 


2.    * 

3-   ^ 


5-  V 


6. 


7. 


RAINFALL — Indicates  that  an  appreciable  quantity  of  rain  (one  hun- 
dredth of  an  inch  or  more)  has  fallen  during  the  day  or  since  the 
last  observation;  also,  that  the  day  is  a  rainy  day  as  distinguished 
from  snowy  or  clear  days. 

SNOWFALL — Indicates  that  an  appreciable  quantity  of  snow  has  fallen 
during  the  day.  -)f°  may  be  used  to  denote  flurries  of  snow. 

HAILSTONES — Hard  semi-transparent  ice,  whether  small  or  large, 
crystalline  or  rounded.  ^°  small  quantity  of  hailstones;  ^2 
large  quantity  of  hailstones. 

SLEET — Or  pellets  of  snow  or  soft  hail  without  any  crystalline  struc- 
ture. This  symbol  is  used  by  the  Germans  for  Graupeln,  or 
snow  pellets,  and  for  the  semi-transparent  mixture  of  snow  and 
ice  that  in  the  dry  weather  of  Central  Europe  nearly  corresponds 
to  the  sleet  of  the  coasts  of  England  and  America.  ^°  small 
quantity  of  sleet;  /^*  much  sleet. 

SILVER  FROST — (English,  "silver  thaw,"  French,  givre,  German, 
Rauhfrost  or  duft-anhang)-,  this  refers  to  an  accumulation  of 
snow  and  sleet  on  the  limbs  of  trees,  in  which  the  snow  is  the 
main  feature,  so  that  the  external  appearance  is  silvery  white 
and  rough. 

)  GLAZED  FROST — (French,  verglas,  German,  Glatteis) ;  this  refers  to 
an  accumulation  of  snow  and  ice  on  the  trees,  in  which  the  ice  is 
in  excess  and  the  external  appearance  is  smooth  and  transparent. 
In  using  the  symbols  for  "silver  frost''  and  '  'glazed  frost, "  the 
Munich  Conference  requests  that  these  terms  be  considered  as 
descriptive  of  the  resulting  phenomena,  no  matter  how  they  are 
brought  about,  therefore  the  definitions  avoid  any  statement  as 
to  the  conditions  attending  the  formation  of  the  depositions. 
The  same  rule  applies  to  the  use  of  the  symbol  for  ''hoar  frost." 

-  ICE-NEEDLES — (Not  yet  well  defined  by  international  usage). 


INTERNATIONAL    METEOROLOGICAL    SYMBOLS.  265 

8.  -4*-  DRIFTING  SNOW — (German,  schneegestober}\  this  symbol  indicates 
that  stiong  winds  are  raising  the  snow  from  the  ground,  filling 
the  air  with  it  like  dust,  and  transporting  it  horizontally;  this 
may  occur  under  a  clear  sky.  The  symbol  does  not  refer  to 
snow  falling  from  the  clouds,  nor  to  the  mere  fact  that  the  snow 
is  lying  in  drifts  on  the  ground.  When  the  air  is  filled  with 
blinding  snow-dust,  use  the  symbol  -4*"2,  but  for  light  winds  and 
light  snow-dust  use  -4>°. 

9.  H  SNOW-COVERING — Or  quantity  of  snow  lying  on  the  ground ;  when 
more  than  half  the  soil  in  the  neighborhood  of  any  station  is 
covered  with  snow  this  is  indicated  by  H,  if  the  snow  covering  is 
thin,  use  H°,  but  if  it  is  considered  deep  for  that  station  use  EEK 

10.  ^  FOG  55  Ground  fog  not  exceeding  height  of  a  man;   ^°  thin  fog  or 

mist  enveloping  and  above  the  observer ;  ^2  heavy  fog  or  mist, 
such  as  the  Scotch  mist,  drizzling  down  upon  the  observer. 
Fog  symbols  should  not  be  used  when  an  observer  at  a  high 
station  notices  fog  in  the  valley  below  him ;  this  should  be 
expressed  by  a  note  in  the  daily  journal. 

11.  oo  HIGH  HAZE — Such  as  makes  distant  mountains   appear   hazy,  or 

such  as  covers  the  sky  in  the  case  of  Indian  .summer  haze  or 
prairie  fires  ;  German,  Moorrauch.  If  clouds  are  also  prevalent 
in  connection  with  this  haze,  the  additional  cloud  signal  should 
be  given.  The  intensity,  or  density,  of  the  haze  is  expressed  by 
00°  for  light  haze  and  002  for  dense  haze.  The  symbol  oo  indi- 
cates merely  the  hazy  condition,  or  the  optical  result,  without 
considering  whether  the  haze  is  caused  by  dust  or  moisture. 

12.  -£±-  DEW;  -^-°  LIGHT  DEW;  -^-2  HEAVY  DEW — As  the  formation  of  dew 

depends  upon  the  nature  and  exposure  of  the  horizontal  surface 
on  which  dew  is  deposited,  the  observer  should  use  the  same 
horizontal  object  uniformly  throughout  the  season. 

13.  ' — '    HOAR   FROST;    i — |0  LIGHT   HOAR   FROST;    '     »2  HEAVY   HOARFROST, 

injurious  to  vegetation — The  expression  "frosty  weather"  refers 
to  the  low  temperature  as  such ;  but  the  expression  "  hoar 
frost ' '  to  the  crystalline  ice  deposited  upon  the  surface  of  solids 
in  the  open  air.  Hoar  frost  is  deposited  on  horizontal  objects 
generally  under  a  clear  sky  at  night. 

14.  — w"  STRONG  WIND — An  arrow  with  four  feathers  indicates  a  wind  whose 

strength  is  8,  9,  10,  n,  or  12  on  the  Beaufort  scale,  or  8,  9,  or 
10,  on  the  international  scale,  or  anything  in  excess  of  50  miles 
per  hour  or  20  metres  per  second  in  absolute  measures;  -W2  a 
remarkably  strong  wind  or  one  exceeding  n  on  the  Beaufort 
scale,  or  80  miles  per  hour,  or  35  metres  per  second. 

15.  -HL  THUNDERSTORM — Namely  thunder,  whether  with  or  without  light- 

ning, rain,  hail,  or  wind. 


266  APPENDIX. 

1 6.  ^  LIGHTNING — Distant  lightning  or  any  form  of  lightning  that  occurs 

without  audible  thunder,  even  when  it  occurs  in  the  zenith, 
which  is  sometimes  the  case  (this  latter  occurrence  should  be 
especially  described  in  the  journal  of  the  observer);  ^°  infre- 
quent lightning,  or  lightning  that  is  confined  to  a  small  region  of 
the  sky;  ^*  lightning  that  occurs  very  frequently  or  extends 
over  a  large  region  of  the  sky.  When  distant  lightning  appears 
at  a  definite  direction  in  the  horizon,  the  observer  should  add  the 
letters  indicating  the  points  of  the  compass,  for  instance,  <£° 
NW.  10  p.  indicates  that  occasional  distant  lightning  occurred 
in  the  northwest  at  ten  p.  m. 

17.  0  SOLAR  AUREOLA,  CORONA,    or  GLORY — German,  Kranz  Lichtkron, 

"Corona,"  Sonnenhof.  These  are  small  circles  of  prismatic 
colors  surrounding  the  sun,  the  radii  of  these  circles  are  usually 
less  than  six  degrees,  but  in  the  extreme  case  of  Bishop's  ring, 
its  radius  was  fifteen  degrees.  Several  concentric  circles  are 
sometimes  visible  ;  each  circular  band  of  prismatic  colors  has  its 
red  on  the  outside,  and  its  blue,  violet,  or  purple  on  the  inside, 
with  respect  to  the  sun  ;  such  rings  are  generally  formed  when 
the  sun  shines  through  a  thin  cloud  and  may  be  seen  if  the  sun 
is  viewed  through  neutral-tinted  glass  or  by  reflection  in  water. 
Similar  circles  surrounding  the  shadow  of  the  observer's  head 
,  are  called  "anthelia,"  "aureolse,"  *  'glories,"  or  "fog-shadows," 
(German,  Gegensonne,  Brockenspectra) . 

1 8.  u/  LUNAR  AUREOLA   or  CORONA — (German,    Mondhof);  circles  sur- 

rounding the  moon  similar  to  the  solar  corona. 

19.  ©  SOLAR  HALO — (German,  Sonnenring)\  these  are  larger  circles  sur- 

rounding the  sun  whose  sizes  are  quite  definite,  namely,  about 
twenty-two  degrees  and  about  forty  degrees  radius  from  the  sun  ; 
they  are  easily  distinguishable  from  the  coronse  by  the  fact  that 
the  colors  are  feebler  and  are  so  arranged  that  the  red  light  is 
inside  or  nearest  the  sun  and  the  blue  light  is  outside ;  the 
greater  part  of  the  breadth  of  the  halo  is  white.  Complex  com- 
binations of  halos,  parhelia,  horizontal  circles,  and  vertical 
columns  sometimes  occur,  all  of  which  may  be  indicated  in 
general  by  the  symbol  02,  where  the  figure  2  indicates  that  the 
display  is  more  brilliant  than  usual ;  a  detailed  statement  of  the 
•  radii  or  diameters  of  the  rings  and  columns  and  of  their  arrange- 
ments should  be  given  in  the  text. 

20.  *D  LUNAR  HALO — (German,   Mondring);  phenomena  surrounding  the 

moon  similar  to  the  solar  halo. 

21.  ^  RAINBOW — Double  rainbows  and  those  with  adjacent  supernumerary 

bows  may  be  indicated  by  >^2. 

22.  ^±^  AURORAL  LIGHTS — Namely,  any  display  of  the  Aurora  Borealis. 


INDEX. 


Abbe,  C.,  work  cited xxxiii,  Iv 

Absolute  measure 260,  261 

zero  of  temperature 259 

Acceleration,  dimensions  of. 262 

of  gravity 258 

Activity,  units  of. 260,  261 

Air,  coefficient  of  expansion  of. 259 

density  of,  at  different  humidities, 

British liv-lv,   221-223 

Metric liv-lvi,  225-228 

density  of,  at  different  pressures, 

British liv,  Iv,  Ivi,  221-223 

Metric liv-lvi,   225-228 

density  of,  at  different  temperatures, 

British liv-lv,  220 

Metric liv-lvi,  224-225 

specific  heat  of  dry 259 

thermal  conductivity  of. 259 

weight  of,  dry 259 

Ampere,  dimensions  of. 262 

Angle, 262 

conversion  of  days  into 212-215 

Angular  velocity,  dimensions  of. 262 

Angot,  A.,  treatise  cited xxii 

Aqueous    vapor,   decrease    of  pressure 

with  altitude '...xliii,  146 

pressure  of, 

British xxxviii,  xxxix,  134,  135 

Metric xli,  142,  143 

pressure  of,  at  low  temperature, 

xxxvi,  130,  131 
in  saturated  air, 

British xxxv,  xxxvi,  122-127 

Metric xxxv,  xxxvi,  128,  129 

weight  of,  British xxxvii,  132 

weight  of,  Metric xxxvii,  133 

Arc,  conversion  into  time li,  210 

of  circle  equal  to  its  radius 258 

Area,  dimensions  of. 262 

of  surface  of  earth 258 

units  of. 260,  261 

Astronomical  constants 259 

Atmosphere,  standard  pressure  of.. .259,  261 

weight  of  unit  of  volume 259 

Aureola,  solar 266 


Aureola,  lunar 266 

Auroral  lights 266 

Avoirdupois,  conversion  into  metric, 

Ivi,  229-230,  260 


Babinet,  barometric  formula  of....xxxii,  118 
Barometer,  correction  for  average  de- 
gree of  humidity, 

xxviii,  xxix,  xxx,  108,  112,  113 
latitude  and  weight  of  mercury, 

xxviii,  xxx,  106,  107,  114 
variation  of  gravity  with  altitude, 

xix,  109,  115 

determination  of  heights  by, 
British  measures, 

xxvi-xxix,  xxxii,  100-109,  I][8 
Metric  measures, 

xxix-xxxi,  xxxii,  110-115,  IJ8 
difference  of  height  corresponding 

to  .01  inch  change xxxi,  116 

i  mm.          "        xxxii,  117 

Barometric  readings, 

reduction  to  standard  gravity, 

xviii-xx,  58-59 

sea  level,  British xx-xxv,  60-77 

Metric xx-xxvi,  78-98 

standard  temperature, 

British xv-xvii,  14-33 

Metric xvii-xviii,  34-56 

when  below  O°C xviii 

pressures  corresponding  to  tempera- 
ture of  boiling  water, xxxv,  119 

Beaufort,  Admiral,  wind,  scale  xlvi,  160,  265 

Belli,  work  cited xxxviii 

Bessel,     "      "     liii 

Bishop's  ring 266 

Boiling  point,  of  water xxxiii,  119 

corresponding  barometric  pressures, 

xxxv,  119 

Brass,  coefficient  of  linear  expansion 259 

Broch,  work  cited xxxv,  Iv,  259 

Brockenspectra 266 

Bunsen,  work  cited 259 


267 


268 


INDEX. 


Caloric 259,  260,  261 

Capacity,  electromagnetic 262 

magnetic  inductive 262 

measures  of,  British 260 

"  Metric 261 

of  an  accumulator 262 

specific  inductive 262 

units  of. 260,  261 

Centigrade,  conversion  into  Fahrenheit, 

xii,  7-9 

when  near  the  boiling  point xii,  9 

of  differences  into  Fahrenheit xiii,  9 

C.  G.  S.  unit  of  magnetic  intensity...lvii,  231 

Circle,  arc  of. 258 

circumference  of. 258 

diameter 258 

circumference  of  earth 258 

equator 258 

Clarke,  A.  R.,  treatise  cited xxii,  xlvii 

Clarke's  spheroid xlvii,  258 

Clouds,  names  and  abbreviations 264 

Coefficient  of  expansion  of  air 259 

linear  "          "  brass 259 

cubical  "          "   glass 259 

expansion  of  mercury 259 

Conductivity,  dimensions  of,  thermal... 262 

specific,  electromagnetic 262 

thermal,  of  air 259 

Conductor,  resistance  of. 262 

Constants,  astronomical 259 

geodetical 258 

numerical 258 

physical 259 

Continental    measures    of  length    and 

equivalents 208 

Conversion  of   measures  of  time  and 

angle li,  209-218 

linear  measures xlix,  180-208 

British  and  Metric  units 260261 

thermometric  scales xi,  2-9 

Correction,  for  air  temperature  in  de- 
termining    heights     by    barometer, 

British xxvii-xxviii,  104-105 

for  air  temperature  in  determining 
heights  by  barometer,  Metric, 

xxix-xxx,  in 
for  temperature  of  the  Mercury  in 

the  thermometer  stem xiv,  12 

for  gravity,  in  determining  heights 

by  the  barometer,  British,  xxviii,  109 
for  gravity,  in  determining  heights 

by  the  barometer,  Metric... xxxi,  115 
for  humidity  in  determining  heights 
by  the  barometer,  British,  xxviii,  108 


Correction  (Continued}. 

for  humidity  in  determining  heights 

by  the  barometer,  Metric,  xxx,  112-113 
for  latitude,  in  determining  heights 
by  the  barometer,  British, 

xxviii,  106-107 
for  latitude,  in  determining  heights 

by  the  barometer,  Metric xxx,  114 

Corona  266 

Cosines,  table  of  natural lix,  236-237 

Cotangents,  table  of  natural lix,  238-239 

Coulomb 262 

Current,  intensity  of. 262 

Days,  conversion  into  decimals  of  year 

and  angle Hi,  212-215 

Day  decimals  of,  into  hours,    minutes 

and  seconds liii,  216 

mean  solar 259 

sidereal 259 

Declination  of  sun xlix,  177 

Degree,  length  of,  of  meridian  and  any 

parallel xlvii,  164,  165 

length    of,    of   meridian  and    any 
parallel  at  different  latitudes, 

xlvii,  164,  165 
Degrees,    Centigrade    into    Fahrenheit 

and  Reaumur xi,  xii,  7,  8,  9 

Fahrenheit  into  Centigrade  xi,  xii,  3-6 
Reaumur  into  Fahrenheit  and  Cen- 
tigrade  xi,  2 

Density,  of  air liv-lvi,  220-228,  259 

of  earth,  mean 258 

surface 258 

dimensions  of 262 

surface 262 

of  mercury 259 

Depth  of  rainfall,  corresponding  quan- 
tity of  water Iviii,  232 

Determination  of  heights  by  barometer, 

British  measures xxvi-xxix,  100-109 

Metric  measures xxix-xxxi,  110-115 

Depression  of  dew-point 138-141 


Dew. 


.265 


Dew-point xxxviii-xli 

Difference    of    heights  by   barometer, 

xxxi,  xxxii,  116,  117 
of  potential 262 

Differences  Fahrenheit  to  Centigrade,  xiii,  9 
Centigrade  to  Fahrenheit xiii,  9 

Dimensions,  in  electrostatic  system 262 

electromagnetic  system 262 

of  the  earth 258 

physical  quantities 262 


INDEX. 


269 


Distance,  mean  of  earth  from  sun 259 

Division  tables  of,  for  28,   29  and  31, 

Iviii,  lix,  233-235 

Dove's  pentades Iviii,  232 

Dry  air,  weight  of. 259 

Drifting  snow 265 

Duft-anhang .265 

Duration  of  sunshine xlviii,  166-177 

Dyne Ivii,  231,  260,  261 

Earth,  area  of  surface  of. 258 

density  of. 258 

dimensions  of. 258 

eccentricity  of. 258 

elliplicity  of. 258 

equatorial  semi-axis 258 

flattening  of. 258 

mean  distance  from  the  sun 259 

El,  value  of  the 208 

Electricity  quantity  of. 262 

Electric  force  or  electro-motive  intensity, 

262 

Electrostatics,  quantities  in 262 

Electromagnetics     "         " 262 

Energy,  dimensions  of. 262 

Equator,  circumference  of. 258 

Equator,  length  of  semi-axis 258 

Erg 260,  261 

Espy,  treatise  cited xxxviii 

Expansion,  coefficient  of,  air 259 

brass 259 

glass 259 

mercury 259 

Fahrenheit,  conversion  into  Centigrade 

and  Reaumur xi,  xii,  3-6 

differences  into  differences  Centi- 
grade  xiii,  9 

Farad,  dimensions  of. 262 

Fathom,  Swedish,  value  of. 208 

Ferrel,  Wm. ,  treatise  cited, 

xxii,  xxxi,  xxxix,  xlix 

Feet,  conversion  into  metres 1,  200-201 

per  second  into  miles  per  hour,  xlv,  155 

metres  per  second 260 

kilometres  per  hour 260 

Flattening  of  the  earth 258 

Fog,  symbol  for 265 

Foot,  value  of,  Austrian 208 

old  French 208 

Russian 208 

Rhenish 208 

Spanish 208 

Swedish...  ....208 


Foot-pound ' 260,  261 

Foot-poundal 260,  261 

Force,  dimensions  of. 262 

units  of. 260,  261 

electric ..262 

magnetic 262 

electromagnetic 262 

Force-de-cheval 260,  261 

Formula,  Babinet's  barometric.... xxxii,  118 
Lambert's,  wind  direction,  xliii,  148-153 

Freezing  point  of  mercury 259 

Frost,  glazed,  hoar,  silver,  symbols,  264,  265 


Gallon  (U.  S.)  and  Imperial 260,  261 

Gaussian  units ...Ivii,  231 

Gegensonne,  symbol  for 266 

Geodetical  constants 258 

tables xlvi,  161 

Givre  or  silver  frost 264 

Glass,  coefficient  of  cubical  expansion... 259 

Glatteis,  or  glazed  frost 264 

Glazed  frost 264 

Glory  or  corona,  symbol  for 266 

Graetz,  work  cited 259 

Grains,  conversion  into  grammes... Ivii,  230 
Grammes,  conversion  into  grains... Ivii,  231 

Gramme-degree  or  therm 261 

Grammes  per  square  centimetre 261 

Graupeln 264 

Gravitation  measure,  units  in 260,  261 

Gravity,  acceleration  of. 258 

correction    for    variation    of,   with 
altitude, xix,  xxxi,  109,  115 

correction    for    variation    of,   with 
latitude xix,  xxx,  106,  114 

reduction  of  barometric  readings  to 
standard xviii-xxiv,  58-98 

relative  acceleration  of,  in  different 

latitudes xlvi,  162,  163 

Guyot,  A.,  treatise  cited xxii 


Hailstones,  description  and  symbol  for.. 264 

Halo,  solar  and  lunar 266 

Hann,  J.,  treatise  cited xliii 

Harkness,  Wm.,  treatise  cited, 

xix,  xxii,  xlvi,  258,  259 

Haze,  symbol  for 265 

Hazen,  H^A.,  treatise  cited.. xliv,  xlv,  Iviii 

Heat,  dimensions  of. 262 

latent,  of  liquefaction  of  ice 259 

vaporization  of  water 259 

mechanical  equivalent  of. 259 


270 


INDEX. 


Heat  (Continued). 

specific,  of  dry  air 259 

ratio  of  the  two,  of  air 259 

units  of. 260,  261 

Hectare 260,  261 

Hectolitre 261 

Heights,  determinatian  of,  by  barometer, 

British.... xxvi-xxix,  100-109 

Metric xxix-xxxi,  110-115 

thermometrical    measurement     of, 

xxxiii,  119 

Hoar-frost,  symbol  for 265 

Horse-power 260,  261 

Hours,   conversion  into  decimals  of  a 

day lii,  216 

of  minutes  and  seconds  into  deci- 
mals of. liii,  217 

Humidity  relative,  British, 

xxxviii-xlii,  138-141 
Metric, 

xxxviii-xlii,  144-145 

term  for Ivi,  225 

Hygrometrical  tables xxxv,  122-146 

Hypsometry xxxiii,  xxxiv,  119 

Ice,  latent  heat  of  liquefaction  of. 259 

needles,  symbol  for 264 

Inches,   conversion    into    millimetres, 

xlix,  180-186 

Inductive  capacity,  magnetic 262 

specific 262 

Inertia,  moment  of. 262 

Intensity,  electro-motive 262 

of  current 262 

of  field 262 

of  magnetization 262 

Interconversion,  of  British  and  Metric 

units 260,  261 

nautical  and  statute  miles li,  208 

sidereal  and  solar  time liii,  218 

International  meteorological  symbols... 263 

James,  H.,  treatise  cited 160 

Joule,  value  of. 259,  261 

Kilogramme-degree 259 

Kilogrammes,  conversion  into  avoirdu- 
pois  Ivi,  230,  260 

Kilogram-metres 260,  261 

Kilogramme,  prototype Ivi 

Kilometres  into  miles li,  206,  207 

per  hour  into  metres  per  second, 

xlvi,  159 
miles  per  hour 261 


Klafter,  Wiener,  value  in  metres  and 

feet 208 

Kranz  or  corona 266 

Lambert's  formula,  mean  wind  direc- 

tion xliii,  148-153 

Laplace,  formula  of. Xx 

Latent  heat  of  liquefaction  of  ice 259 

vaporization  of  water 259 

Latitude,  gravity  correction  for, 

xix,  xxx,  1 06,  114 

Laughton,J.  K.  treatise  cited 160 

Length  of  arc  of  meridian xlvii,  164 

parallel xlvii,  165 

dimensions  of. 262 

of  equator  of  earth 258 

meridian  circumference  of. 258 

second's  pendulum 258 

measures  of.  Continental  with  met- 
ric and  British  equivalents li,  208 

units  of. 260 

Libby,  Wm.,  work  cited, 

xxxviii,  xlviii,  Ivii 

Lichtkron  or  corona 266 

Light,  velocity  of 259 

Lightning,  symbol  for 266 

Line,  old  French,  value  of. 208 

Linear  measures xlix,  179-208 

Litre,  value  of. 260,  261 

Logarithms,  table  of lix,  240-241 

Naperian  base 258 

Modulus  of  common 258 

Lunar  aureola,  halo,  corona 266 

Magnetic  force 262 

inductive  capacity 262 

intensity,  units  of. Ivii 

table  for  converting Ivii,  231 

moment 262 

potential 262 

Magnetism,  quantity  of 262 

Magnetization,  intensity  of. 262 

Marek,  M.,  treatise  cited xxi 

Marvin,  C.  F.,  treatise  cited xxxvi 

Mass,  dimensions  of. 262 

units  of. 260,  261 

Mean  density  of  the  earth 258 

Mean  distance  of  earth  from  sun 259 

Mean  solar  time,  con  version  into  sidereal, 

liii,  218 

Mean  time  at  apparent  noon liii,  217 

Measures  of  angle li,  209 

of  length,  continental,  Metric  and 
British li,  208 


INDEX. 


271 


Measures  (Continued). 

time li,  209 

tables  for  interconversion  of.... 260,  261 

Mechanical  equivalent  of  heat 259 

Megalerg 261 

Mercury,  coefficient  of  expansion... xvi,  259 

density  of. 259 

freezing  point  of. 259 

Mercurial  column,  one  inch  high,  pres- 
sure of. 259 

Meridian,  arcs  of  terrestrial xlvii 

length  of  a  degree xlvii,  164 

ellipse,  perimeter  of. 258 

Meteorological  stations,  list  of...lix,  243-257 

Metre vi,  xlix,  260,  261 

Metres,  conversion  into  feet,  1,  202-203,  261 
per  second  into  kilometres  per  hour, 

xlvi,  158,  159 
miles  per  hour....xlv,  156,  157,  261 

Micron 261 

Mile,  Austrian  post,  value  of 208 

Danish,  "       208 

German  sea,  "       208 

Nautical,  "       li,  208 

Netherlands  (migl),  "       208 

Norwegian,  "       208 

Prussian,  "       208 

Swedish,  "       208 

Statute  (British),       "       208 

Miles,  conversion  into  kilometres, 

li,  204-205,  261 

nautical li,  208 

statute H,  208 

per  hour  into  feet  per  second, 

xlv,  154,  155 

metres  per  second,  xlv,  154,  157,  260 
kilometres  per  hour... xlv,  154,  260 
Millimetres,  conversion  into  inches, 

1,  187-199 

Minutes  of  time,  into  arc lii,  211 

into  decimals  of  a  day lii,  216 

conversion  of  day  into liii,  216 

conversion  into  decimals  of  an  hour, 

liii,  217 

Moment  of  inertia 262 

Momentum,  dimensions  of. 262 

Mondhof  or  lunar  corona 266 

Mondring  or  lunar  halo 266 

Moorrauch  or  high  haze 265 

Moritz,  A.,  treatise  cited xxxv 

Munich  Conference 263,  264 

Naperian  base  of  logarithms 258 

Nautical  mile,  equivalent  in  statute,  li,  208 


Neumayer,  G.,  treatise  cited 160 

Numerical  constants 258 

Numbers,  logarithms  of. lix,  240,  241 

Ohm,  dimensions  of 262 

Ounces,  conversion   into  kilogrammes, 

Ivi,  229 
kilogrammes  into Ivi,  Ivii,  230,  261 

Palm,  Netherlands,  value  of. 208 

Parallel,  length  of  a  degree  on xlvii,  165 

Pendulum,  length  of  second's 258 

Pentades,  Dove's Iviii,  232 

Perimeter  of  meridian  ellipse 258 

Physical  constants 259 

quantities,  dimensions  of. ; 262 

Potential,  difference  of. 262 

in  electro-magnetics 262 

magnetic 262 

Pound,    avoirdupois,    conversion    into 
kilogramme Ivi,  229,  260 

imperial  standard Ivi 

Pounds,  per  square  foot 260 

inch 260 

Poundal 260,  261 

Pound-degree 259,  260,  261 

Power  or  rate  of  working 262 

Pressure  of  aqueous  vapor,    British, 

xxxviii,  122,  128,  134,  135 
Pressure  of  aqueous  vapor,  Metric, 

xli,  128,  129,  142 

Pressure  of  aqueous  vapor  at  low  tem- 
peratures  xxxvi,  130,  131 

Pressure  of  standard  atmosphere 259 

decrease  of  vapor  pressure  with  alti- 
tude  xliii,  146 

Prototype  kilogramme Ivi 

Psychrometer,  whirled xxxviii,  xxxix 

Psychrometric  observations, 

reduction  of,  British xxxix,  134,  137 

Metric xli,  142-143 

Quantity  of  electricity 262 

conveyed  by  current 262 

magnetism 262 

Quantities  physical,  dimensions  of. 262 

Quantity    of  water    corresponding    to 
given  depths  of  rainfall Iviii,  232 

Rainbow,  symbol  for 266 

Rainfall,  conversion  of  depth  of,  into 

gallons  and  tons Iviii,  232 

symbol  for. 264 


272 


INDKX. 


Rate  of  decrease  of  vapor  pressure  with 

altitude xliii,  146 

Rate  of  working,  dimensions  of. 262 

Ratio  of  specific  heats  of  air 259 

yard  to  metre vi 

Rauhfrost,  or  silver  frost 264 

Reaumur,  conversion  to  centigrade xi,  2 

Fahrenheit xi,  2 

Regnault,  treatise  cited... xxxiv,  xxxv,  259 

Recknagel,  work  cited 259 

Reduction  of  barometer  to  sea    level, 

xx-xxiv,  60-98 
standard  temperature,  xv-xix,  14-56 

gravity xxxi,  58,  59 

psychrometric  observations,  xli,i42,i43 

of  snowfall  measurement xlii,  146 

Relative  humidity, 

xxxviii,  xlii,  138-141,  144-145 
Relative    intensity    of  solar  radiation, 

xlix,  178 

Resistance  of  a  conductor 262 

specific 262 

Rode,  Danish,  value  of. 208 

Rontgen,  work  cited 259 

Rowland,  H.  A.,  treatise  cited 259 

Ruthe,  Prussian,  value  of. 208 

Norwegian,         "        208 

Sagene  (Russian),  value  of 208 

Scales,  comparison  of  thermometric xi 

Reaumur  to  Fahrenheit 2 

Centigrade 2 

Fahrenheit  to  Centigrade 3-6 

Centigrade  to  Fahrenheit 7-9 

Schott,  C.  A.,  treatise  cited 160 

Scott,  R.  H.,  treatise  cited 160 

Schneegestober  or  drifting  snow 265 

Sea-level,  reduction  of  barometer  to, 

British .xx-xxv,  60-77 

Metric xx-xxvi,  78-98 

Seconds,  of  time  into  arc 211 

decimals  of  a  day Hi,  216 

conversion  of  decimals  of  a  day  into, 

liii,  216 
of  time  into  decimals  of  an  hour, 

liii,  217 

pendulum,  length  of. 258 

reduction  for,  sidereal  or  solar  time, 

liv,  218 

circumference  of  circle  in 258 

arc  of  circle  in 258 

Sidereal  day  and  year 259 

time,   conversion  to  mean   solar, 

liii,  liv,  218 


Silver  frost 264 

Sines,  table  of  natural , lix,  236-237 

Sleet,  symbol  for 264 

Snowfall,  symbol  for 264 

weight  of  and  corresponding  depth 

of  water xlii-xliii,  146 

Solar,  day  mean 259 

time,  mean,  conversion  to  sideral, 

liii,  liv,  218 

aureola,  symbol  for 266 

corona         "        "  266 

halo  "         "   .266 

radiation,  relative  intensity  of, 

xlix,  178 

Sonnenhof,  symbol  for 266 

Sonnenring       "         "  266 

Sound,  velocity  of. 259 

Specific  heat  of  dry  air 259 

heats,  ratio  of,  of  air 259 

conductivity 262 

inductive  capacity 262 

resistance 262 

Spheroid,  Clarke's xlvii,  258 

Standard  atmosphere 259,  261 

Stations,  International  Polar 257 

list  of  meteorological lix,  243-257 

of  first  order lix 

in  Africa 256-257 

Asia,  254-255,  Australasia,  256, 
Europe,  247-254,  North  America, 
244-246,  South  America,  246-247, 
Austro-Hungary,  247-248,  Bel- 
gium, 248,  British  Isles,  248-249, 
Canada,  244,  Central  America,  244, 
Denmark,  249,  France,  249,  Ger- 
many, 250,  Greece,  248,  Green- 
land, 244,  Holland,  248,  Italy, 
251,  Mexico,  244,  Norway,  249, 
Portugal,  253,  Roumania,  248, 
Russia,  251-253,  Spain,  253, 
Sweden,  249,  Switzerland,  253, 
254,  Turkey,  248,  United  States, 
245-246,  West  Indies,  244. 

Statute  miles,  conversion  of. li,  208 

Stere,  value  of 260,  261 

Strength  of  field 262 

pole,  in  magnetics 262 

Stress,  dimensions  of. 262 

units  of. 260,  261 

Sun,  declination  of xlix,  177 

mean  distance  from  the  earth 259 

Sunshine,  duration  of,  at  different  lati- 
tudes and  declinations xlviii,  166-177 

Surface  (area),  unitsof. 260,  261 


INDEX. 


273 


Surface  (Continued). 

density  of  the  earth 258 

in  electro-statics 262 

Symbols,    International   Meteorologic, 

263-266 

Synoptic     conversion    of   British    and 
Metric  units....  ...260-261 


Table  for  conversion  of  arc  into  time  li,  210 

linear  measures 180-208 

mean  solar  into  sidereal liii,  liv,  218 

measures  of  weight 229-23 1 

sidereal  into  mean  solar liii,  liv,  218 

time  into  arc lii,  211 

Centigrade   readings  into  Fahren- 
heit and  Reaumur xi,  xii,  7,  8,  9 

near  boiling  point xii,  9 

velocities 154-159 

differences  F  to  differences  C xiii,  9 

C  "  F xiii,  9 

Fahrenheit    readings    into    Centi- 
grade  xi,  xii,  3-6 

Reaumur  readings  into  F  and  C...xi,  2 
determination  of  heights  by  baro- 
meter, British 100-109 

determination  of  heights  by  baro- 
meter, Metric 110-115 

decrease  of  vapor  pressure  with  al- 
titude  146 

dividing  by  28 Iviii,  lix,  233 

29 Iviii,  lix,  234 

30 Iviii,  lix,  235 

density  of  air 220,  228 

reduction  of  barometer  to  standard 

temperature 14-56 

gravity 58-59 

sea-level 60-98 

psychrometric    observations, 

136-145 

snowfall  measurements 146 

temperature  to  sea-level 10,  n 

of  duration  of  sunshine 166-177 

intensity  of  solar  radiation 178 

lengths  of  degree 164-165 

natural  cosines  and  sines 236-237 

cotangents  and  tangents.... 238-239 

pressure  of  aqueous  vapor 122-131 

pressures  and  corresponding  boil- 
ing points 119 

quantity    of   rainfall    and    corres- 
ponding depths 232 

of  relative  acceleration  of  gravity, 

162,  163 


Tables  of  relative  humidity, 

138-141,  144-145 
Table  of  weight  of  aqueous  vapor...  13 2-1 33 

Tangents,  table  of  natural lix,  238,  239 

Temperature,  absolute  zero  of 259 

of  freezing  point  of  mercury 259 

decrease  of,  with  altitude, 

xiii,  xiv,  10,  n 
reduction  to  sea  level,  British, 

xiii,  xiv,  10 
reduction  to  sea  level,  Metric, 

xiii,  xiv,  ii 

Thermometer,  hypsometric xxxi v 

stem,  correction  for  temperature  of 

mercury xiv,  12 

Therm  or  gramme  degree 261 

Thermal  conduct! vely  of  air 259 

Thermometric  scales xi,  2-0 

Thomson,  W.,  treatise  cited 259 

Thorpe,  T.  B.,  "          xiv 

Thunderstorm,  symbol  for 265 

Time,  conversion  into  arc lii,  211 

of  arc  into li,  210 

dimensions  of 262 

mean,  at  apparent  noon liii,  217 

mean  solar  into  sidereal liii-liv,  218 

minutes  of,  into  arc 211 

seconds  of,         "      211 

sidereal  into  mean  solar liii-liv,  218 

Tois£,  old  French 208 

Ton 260 

Tonne 261 

Tropical  year liii,  259 

Units  of  magnetic  intensity Ivii,  231 

interconversion  of  British  and  Met- 
ric  260,  261 

Vapor  aqueous,  pressure  of,  British, 

xxxv,  122-127 
Metric,  xxxvi,  128-129 

at  low  temperature xxxvi,  130,  131 

decrease  of  pressure  with  altitude, 

xliii,  146 

weight  of. xxxvii,  xxxviii,  132,  133 

Vaporization,  latent  heat  of,  of  water... 259 

Vara,  Mexican,  value  of. 208 

Spanish,  "         208 

Velocity,  dimensions  of. 262 

of  light 259 

sound 259 

units  of. 260,  261 

Velocities,  conversion  of... xiv,  xlvi,  154-159 
Verglas  or  glazed  frost,  symbol  for 264 


274 


INDEX. 


Versta  orWerst  (Russian) 208 

Volt,  dimensions  of. 262 

Volume,  dimensions  of 262 

units  of. 260,  261 

of  distilled  water 259 


Water,  distilled,  volume  and  weight  of, 

259 

latent  heat  of  vaporization  of. 259 

specific  heat  of,  compared  with  air... 259 

Watt 260,261 

Weight  of  aqueous  vapor, 

xxxvii,  xxxviii,  132,  133 

distilled  water 259 

dry  air 259 

one  grain  in  dynes 260 

pound  in  dynes 260 

dyne  261 


Werstor  versta,  Russian 208 

Wind,   mean    direction    by    Lambert's 

formula xliii,  148-153 

scale,  Beaufort,  conversion xlvi,  160 

symbols  for 265 

tables xliii,  148-160 

Work,  dimensions  of. 262 

units  of,  in  absolute  measure... 260,  261 

Working,  rate  of. 262 

Yard,  ratio  of  to  metre ..vi 

Year,  conversion  of  days  into  decimals 

of,  and  angle Hi,  212-215 

bissextile,  days  into    decimals   of, 

lii,  212-215 

length  of  tropical liii,  259 

sidereal 259 

Zero,  absolute,  of  temperature 259 


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